Log in

Relevant bibliographies by topics / Polyether resins / Journal articles

To see the other types of publications on this topic, follow the link: Polyether resins.

Journal articles on the topic 'Polyether resins'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Polyether resins.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Bamane, Swapnil S., Prashik S. Gaikwad, Matthew S. Radue, S. Gowtham, and Gregory M. Odegard. "Wetting Simulations of High-Performance Polymer Resins on Carbon Surfaces as a Function of Temperature Using Molecular Dynamics." Polymers 13, no. 13 (June 30, 2021): 2162. http://dx.doi.org/10.3390/polym13132162.

Full text

Abstract:

Resin/reinforcement wetting is a key parameter in the manufacturing of carbon nanotube (CNT)-based composite materials. Determining the contact angle between combinations of liquid resin and reinforcement surfaces is a common method for quantifying wettability. As experimental measurement of contact angle can be difficult when screening multiple high-performance resins with CNT materials such as CNT bundles or yarns, computational approaches are necessary to facilitate CNT composite material design. A molecular dynamics simulation method is developed to predict the contact angle of high-performance polymer resins on CNT surfaces dominated by aromatic carbon, aliphatic carbon, or a mixture thereof (amorphous carbon). Several resin systems are simulated and compared. The results indicate that the monomer chain length, chemical groups on the monomer, and simulation temperature have a significant impact on the predicted contact angle values on the CNT surface. Difunctional epoxy and cyanate ester resins show the overall highest levels of wettability, regardless of the aromatic/aliphatic nature of the CNT material surface. Tetrafunctional epoxy demonstrates excellent wettability on aliphatic-dominated surfaces at elevated temperatures. Bismaleimide and benzoxazine resins show intermediate levels of wetting, while typical molecular weights of polyether ether ketone demonstrate poor wetting on the CNT surfaces.

APA, Harvard, Vancouver, ISO, and other styles

2

Lee, Lung-Ta, and Chin-Ping Yang. "Synthesis and properties of cationic resins derived from polyether/polyester-modified epoxy resins." Journal of Applied Polymer Science 46, no. 6 (October 25, 1992): 991–1000. http://dx.doi.org/10.1002/app.1992.070460607.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Laney, E. Elizabeth, Joung Hae Lee, Jong Seung Kim, Xiaowu Huang, Youngchan Jang, Hong-Sik Hwang, Takashi Hayashita, and Richard A. Bartsch. "Sorption of lead(II) by proton-ionizable polyether resins." Reactive and Functional Polymers 36, no. 2 (March 1998): 125–34. http://dx.doi.org/10.1016/s1381-5148(97)00108-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Viswanathan, Tito, Alan Toland, and Rui-Qin Liu. "Whey-based polyether polyols as modifiers of phenol—formaldehyde resins." Carbohydrate Polymers 28, no. 3 (November 1995): 203–7. http://dx.doi.org/10.1016/0144-8617(95)00122-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Kofler, Lukas, Markus Wambacher, Katrin Schweinzer, Maritta Scherl, and Heinz Kofler. "Allergic Reaction to Polyether Ether Ketone Following Cross-Reactivity to Epoxy Resin." Journal of Cutaneous Medicine and Surgery 21, no. 1 (August 20, 2016): 78–79. http://dx.doi.org/10.1177/1203475416665606.

Full text

Abstract:

Polyether ether ketone (PEEK) is a thermoplastic polymer frequently used in engineering but also in medical devices. Only 1 case of allergic reaction to PEEK used as an implanted medical device has been reported so far; however, the route of sensitization remained unclear. Here we report on a 62-year-old male patient with a preknown, severe type IV allergy to epoxy resin. He reported strong pain in his shoulder after implantation of a PEEK-containing device after a rotator cuff injury. For testing, the device was implanted in a small pouch subcutaneously on the abdomen. The patient reported massive pain starting 8 hours after the implantation, strictly limited to the procedural area and showing perifocal erythema. A possible explanation of the sensitization mode is the source material for PEEK and epoxy resin, as both are mainly based on bisphenols. An allergic reaction to PEEK with preknown epoxy resin sensitization has not been reported so far. As epoxy resins are a frequent cause of occupational contact dermatitis and PEEK is widely used for medical and nonmedical devices, we believe that this is of great clinical relevance.

APA, Harvard, Vancouver, ISO, and other styles

6

Ebner, Catharina, Julia Mitterer, Joamin Gonzalez-Gutierrez, Gisbert Rieß, and Wolfgang Kern. "Resins for Frontal Photopolymerization: Combining Depth-Cure and Tunable Mechanical Properties." Materials 14, no. 4 (February 5, 2021): 743. http://dx.doi.org/10.3390/ma14040743.

Full text

Abstract:

Photopolymerization has undergone significant development in recent years. It enables fast and easy processing of materials with customized properties and allows precise printing of complex surface geometries. Nevertheless, photopolymerization is mainly applied to cure thin films since the low curing depth limits the fast production of large volumes. Frontal photopolymerization (FPP) is suitable to overcome these limitations so that curing of centimeter-thick (meth)acrylic layers can be accomplished within minutes by light induction only. Prerequisites, however, are the low optical density of the resin and bleaching ability of the photoinitiator. To date, tailored FPP-resins are not commercially available. This study discusses the potential of long-chain polyether dimethacrylates, offering high-temperature resistance and low optical density, as crosslinkers in photobleaching resins and investigates the mechanical properties of photofrontally-cured copolymers. Characteristics ranging from ductile to hard and brittle are observed in tensile tests, demonstrating that deep curing and versatile material properties are achieved with FPP. Analyzed components display uniform polymerization over a depth of four centimeters in Fourier transform infrared spectroscopy and swelling tests.

APA, Harvard, Vancouver, ISO, and other styles

7

Yin, Hao, Yun Wan, Jinjun Zhou, Dewen Sun, Bo Li, and Qianping Ran. "Self-emulsified waterborne epoxy hardener without acid neutralizers and its emulsifying and curing properties." Pigment & Resin Technology 48, no. 3 (May 7, 2019): 223–28. http://dx.doi.org/10.1108/prt-06-2017-0058.

Full text

Abstract:

Purpose The purpose of this study is to prepare a new self-emulsified waterborne epoxy hardener which can emulsify the liquid epoxy resin in aqueous media without addition of acid neutralizers. Design/methodology/approach Two synthetic steps were adopted to prepare novel self-emulsified amine-epoxy adduct type hardener composition based on the reaction of a commercially available polyetheramine, bisphenol A epoxy resin and triethylene tetramine. The different factors affecting the synthesis of the waterborne epoxy hardener were explored by emulsifying and curing properties. The process and products were analyzed and confirmed by FIRT. Findings Compared to an introduction of polyether as a hydrophilic segment in previous literature, whose reaction required Lewis acid catalysts and strict control of the presence of water, the introduction of polyetheramine to obtain a novel self-emulsified waterborne epoxy hardener were concise and convenient by mere two amine-epoxy addition steps in this research. Moreover, the final product offered good film formation with a practical value of mechanical properties, glass transition temperature and water-resistant property. Practical implications The self-emulsified waterborne epoxy hardener can be used to prepare water-resistant waterborne coatings from liquid epoxy resins while also providing the option of zero VOC formulations. Originality/value Introduction of hydrophilic polyether amine to prepare self-emulsified waterborne epoxy hardener without acid neutralizers has not been systematically studied previously.

APA, Harvard, Vancouver, ISO, and other styles

8

TOYA, Hideki. "Synthesis of Polythiol Prepolymer Containing Polyether-Structure and Properties of Cured Resins." KOBUNSHI RONBUNSHU 49, no. 5 (1992): 455–58. http://dx.doi.org/10.1295/koron.49.455.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Theiler, Stefan, Stefanos E. Diamantouros, Stefan Jockenhoevel, Helmut Keul, and Martin Moeller. "Synthesis and characterization of biodegradable polyester/polyether resins via Michael-type addition." Polymer Chemistry 2, no. 10 (2011): 2273. http://dx.doi.org/10.1039/c1py00262g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Juraev, A. B., F. A. Magrupov, and M. G. Alimukhamedov. "Hardening condition of unsaturated polyether from alcoholysis products of secondary polyethylene terephthalate." Plasticheskie massy, no. 5-6 (July 17, 2021): 47–49. http://dx.doi.org/10.35164/0554-2901-2021-5-6-47-49.

Full text

Abstract:

The technological parameters of the curing of unsaturated polyesters synthesized on the basis of alcoholysis products of secondary polyethylene terephthalate and used in the production of fiberglass pipes have been studied. It is shown that unsaturated polyesters synthesized on the basis of alcoholysis products can completely substitute imported resins of 196 and 196A grades in the production of fi berglass pipes.

APA, Harvard, Vancouver, ISO, and other styles

11

Rigail-Cedeño, Andres F., Mayken Espinoza-Andaluz, Jorge Medina-Andrade, and Karol Leal-Zavala. "Expanded Graphite/Epoxy/Aliphatic Amine Composites for Bipolar Plates Applications in Polymer Electrolyte Fuel Cells." Key Engineering Materials 821 (September 2019): 426–32. http://dx.doi.org/10.4028/www.scientific.net/kem.821.426.

Full text

Abstract:

Suitable conductive fillers for resins and processing conditions are critical factors for the final properties of composite bipolar plates. This research is focused on the development of expanded graphite/epoxy/aliphatic amine composite as a potential replacement for conventional bipolar plates to meet global standards of Polymer Electrolyte Fuel Cells (PEFCs). The synergistic effects on the electrical conductivity of secondary fillers Carbon Black (CB) and Graphite nanoplatelets (GNP) with Expanded Graphite (EG) were studied in a diglycidyl ether of bisphenol A (DGEBA) epoxy/polyether triamine system. Compositions of secondary filler were varied in proportions of 5, 10, 15 and 20 wt % in a fixed 40 wt % EG / Epoxy resin (w/w) to find the right secondary fillers under direct mixing without solvent. A 10 wt % CB displayed the highest electrical conductivity around 3.05 QUOTE x10-2 S/cm. For a 60 wt % EG/10 wt % CB composite, the electrical conductivity (in plane) and flexural strength were at about 19 S/cm and 22 MPa, respectively.

APA, Harvard, Vancouver, ISO, and other styles

12

Yi, Jinhua, and Xin Yuan. "The Effect of Bisphenol A Polyether Polyols on the Synthesis of Hydrophilic Epoxy Resins." American Journal of Biochemistry and Biotechnology 17, no. 3 (March 1, 2021): 302–11. http://dx.doi.org/10.3844/ajbbsp.2021.302.311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Ma, Songqi, Weiqu Liu, Zhengfang Wang, Chaohui Hu, and Chunyi Tang. "Simultaneously Increasing Impact Resistance and Thermal Properties of Epoxy Resins Modified by Polyether-Grafted-EpoxidePolysiloxane." Polymer-Plastics Technology and Engineering 49, no. 5 (April 15, 2010): 467–73. http://dx.doi.org/10.1080/03602550903532190.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Mamiński, Mariusz Ł., Jerzy Pawlicki, Aleksander Zado, and Paweł Parzuchowski. "Hyperbranched Polyether as a Modifying Agent for Urea-Formaldehyde Resins—Hardness and Strength Control Tool." International Journal of Polymeric Materials 56, no. 4 (April 2007): 453–60. http://dx.doi.org/10.1080/00914030600904645.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Li, Ye-Shiu, Ming-Shiu Li, Chen-Chi M. Ma, Hung-Chung Hsia, and Der-Shyang Chen. "Polyether and polyester polyol based glycidyl-terminated polyurethane modified epoxy resins: Mechanical properties and morphology." Polymer International 35, no. 4 (December 1994): 371–78. http://dx.doi.org/10.1002/pi.1994.210350410.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Grittner, N., W. Kaminsky, and G. Obst. "Fluid bed pyrolysis of anhydride-hardened epoxy resins and polyether-polyurethane by the Hamburg process." Journal of Analytical and Applied Pyrolysis 25 (June 1993): 293–99. http://dx.doi.org/10.1016/0165-2370(93)80048-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Okayasu, Mitsuhiro, Yuki Tsuchiya, and Hiroaki Arai. "Experimentally and analyzed property of carbon fiber reinforced thermoplastic and thermoset plates." Journal of Materials Science Research 7, no. 3 (June 30, 2018): 12. http://dx.doi.org/10.5539/jmsr.v7n3p12.

Full text

Abstract:

The tensile and fatigue properties of long unidirectional (UD) and crossply (CR) carbon fiber reinforced plastics (CFRPs) were investigated. The CFRPs in this study were fabricated from 60% CF and various resins: epoxy, polyamide (PA6), polyphenylene sulfide (PPS), and polyether ether ketone (PEEK). The ultimate tensile strength sUTS of Epoxy-CFRP was found to be about twice that of PEEK-CFRP. Relatively high tensile strengths were found for PPS- and PA6-CFRP in the thermoset resin group, although these were still only about 85% of the strength of epoxy-CFRP. The tensile and fatigue strengths of the CR-CFRPs were less than half those of the UD-CFRPs, even though high ductilities were found for the CR-CFRPs. These high ductilities can be attributed to the crosslinking fiber effect and the low proportion of CFs in the loading direction. The sUTS values of CFRPs depend not only on the tensile strengths s and volume fractions V of CF and resin (i.e., through the conventional compound law sUTS = sfiberVfiber + sresinVresin), but also on several material properties, including the wettability of the CF by the resin. On the basis of the material properties, the ultimate tensile strengths of various UD- and CR-CFRPs were well estimated numerically through a statistical analysis, which afforded better estimates than those obtained from the compound law.

APA, Harvard, Vancouver, ISO, and other styles

18

Hayashita, Takashi, Mi Ja Goo, Jong Chan Lee, Jong Seung Kim, Jan Krzykawski, and Richard A. Bartsch. "Selective sorption of alkali-metal cations by carboxylic acid resins containing acyclic or cyclic polyether units." Analytical Chemistry 62, no. 21 (November 1990): 2283–87. http://dx.doi.org/10.1021/ac00220a006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Wang, F. H., L. B. Shen, H. Zhu, and K. F. Han. "The Preparation of a Polyether Demulsifier Modified by Nano-SiO2and the Effect on Asphaltenes and Resins." Petroleum Science and Technology 29, no. 24 (October 24, 2011): 2521–29. http://dx.doi.org/10.1080/10916460903393997.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Zhao, Heng, Shuangshuang Xu, Anru Guo, Jie Li, and Dong Liu. "The Curing Kinetics Analysis of Four Epoxy Resins Using a Diamine Terminated Polyether as Curing Agent." Thermochimica Acta 702 (August 2021): 178987. http://dx.doi.org/10.1016/j.tca.2021.178987.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Khalesi, Rayhaneh, Mahdi Abbasi, Zahra Shahidi, Masoumeh Hasani Tabatabaei, and Zohreh Moradi. "Interfacial Fracture Toughness Comparison of Three Indirect Resin Composites to Dentin and Polyether Ether Ketone Polymer." European Journal of Dentistry 14, no. 03 (July 2020): 456–61. http://dx.doi.org/10.1055/s-0040-1713309.

Full text

Abstract:

Abstract Objectives Advances in laboratory composites and their high wear resistance and fracture toughness have resulted in their growing popularity and increasing use for dental restorations. This study sought to assess the fracture toughness of three indirect composites bonded to dental substrate and polyether ether ketone (PEEK) polymer. Materials and Methods This in vitro study was conducted on two groups of dental and polymer substrates. Each substrate was bonded to three indirect composite resins. Sixty blocks (3 × 3 × 12 mm) were made of sound bovine anterior teeth and PEEK polymer. Sixty blocks (3 × 3 × 12 mm) were fabricated of CRIOS (Coltene, Germany), high impact polymer composite (HIPC; Bredent, Germany), and GRADIA (Indirect; GC, Japan) composite resins. Composites were bonded to dentin using Panavia F 2.0 (Kuraray, Japan). For bonding to PEEK, Combo.lign (Bredent) and Visio.Link (Bredent) luting cements were used. In all samples, a single-edge notch was created by a no. 11 surgical blade at the interface. The samples were subjected to 3,500 thermal cycles, and their fracture toughness was measured in a universal testing machine (Zwick/Roell, Germany) by application of four-point flexural load. Statistical Analysis Data were analyzed using one-way analysis of variance, Kruskal–Wallis. Results The fracture toughness of CRIOS–PEEK interface was significantly higher than HIPC–PEEK. The fracture toughness of GRADIA–PEEK was not significantly different from that of HIPC and CRIOS. The fracture toughness of GRADIA–dentin was significantly higher than HIPC–dentin. Conclusion Considering the limitations of this study, GRADIA has the highest bond strength to dentin, while CRIOS shows the highest bond strength to PEEK.

APA, Harvard, Vancouver, ISO, and other styles

22

Isarn, Isaac, Francesco Gamardella, Xavier Fernàndez-Francos, Àngels Serra, and Francesc Ferrando. "Thermal Conductive Composites Prepared by Addition of Several Ceramic Fillers to Thermally Cationic Curing Cycloaliphatic Epoxy Resins." Polymers 11, no. 1 (January 15, 2019): 138. http://dx.doi.org/10.3390/polym11010138.

Full text

Abstract:

Novel composite coatings prepared from 3,4-epoxy cyclohexylmethyl 3,4-epoxycyclohexane carboxylate (ECC) and different ceramic fillers have been prepared to improve the thermal dissipation of electronic devices. As latent cationic initiator, a benzylanilinium salt with triethanolamine has been used, which leads to a polyether matrix. Different proportions of Al2O3, AlN and SiC as fillers were added to the reactive formulation. The effect of the fillers selected and their proportions on the evolution of the curing was studied by calorimetry and rheometry. The thermal conductivity, thermal stability, thermal expansion coefficient and thermomechanical and mechanical properties of the composites were evaluated. An improvement of 820% in thermal conductivity in reference to the neat material was reached with a 75 wt % of AlN, whereas glass transition temperatures higher than 200 °C were determined in all the composites.

APA, Harvard, Vancouver, ISO, and other styles

23

Liu, Juan, Shan-Shan Jin, Ying-Ping Qi, Yong-Feng Shen, and Hua Li. "Preparation and Application of Polyurethane Coating Material Based on Epoxycyclohexane-Epoxychloropropane Protective for Paper." Coatings 11, no. 8 (August 23, 2021): 1005. http://dx.doi.org/10.3390/coatings11081005.

Full text

Abstract:

Paper historic relics are of great value to research and preserve. However, with the change of environment, paper cultural relics are constantly aging and damaged. Therefore, the reinforcement and conservation of the paper is an important topic in the field of cultural relics protection; thus, it is a crucial and arduous task to discover high-performance protective materials. The coating reinforcement method is a kind of commonsense method to strengthen the paper. Additionally, it is key to select appropriate reinforcing resins. Polyurethane has influence on the improvement of paper strength, stability, and appearance. The epoxycyclohexane-epoxychloropropane polyether polyol was prepared with epoxycyclohexane and epoxychloropropane as materials, glycerol as the initiator, boron trifluoride diethyl etherate as the catalyst, and dichloromethane as the solvent. Infrared (IR) spectroscopy as well as proton nuclear magnetic resonance (1HNMR) spectroscopy were adopted to characterize the structure of the synthetic copolyether. Then, polyurethane based on epoxycyclohexane-epoxychloropropane was prepared by the synthetic copolyether reacting with hexamethylene diisocyanate (HDI) trimer. The effect of the mass concentration of polyurethane on the tensile strength, elongation, folding endurance, and the tearing strength of paper samples were tested. When 10% polyurethane solution was applied to paper, not only were the mechanical properties greatly improved, but the gloss and brightness also changed slightly, which conformed to the principle of “repair as old”. The above results indicate that the synthetic polyurethane combines the advantages of epoxycyclohexane-poxychloropropane polyether polyol along with polyurethane, presenting excellent properties in paper reinforcement or conservation.

APA, Harvard, Vancouver, ISO, and other styles

24

Shah, Syed Sajid Ali, Habib Nasir, and Noaman Ul-Haq. "Synthesis of Cyanate Ester Based Thermoset Resin by Using Copper (II) Oxalate as Catalyst and its Application in Carbon Fiber Composites." Nano Hybrids and Composites 22 (September 2018): 1–9. http://dx.doi.org/10.4028/www.scientific.net/nhc.22.1.

Full text

Abstract:

Polymer matrix plays a crucial role in the development of advanced light weight composite materials, and is mainly responsible for thermal and mechanical properties. These polymer matrices are usually thermosetting plastics due to their ease of processing. Thermoset resins were prepared using different compositions of dicyanate ester of bisphenol A and polyether imide and carbon fiber laminates were prepared by wet layup technique. Small amount of epoxy (diglycidyl ether of bisphenol A) was also added to the composites to improve the (interfacial) bonding between the carbon fiber and the resin. The Copper (II) oxalate with 1,5-pentanediol was used as a catalyst for the first time to reduce the curing time from eight hours to four hours. The catalyst has also reduced the curing temperature from 400°C to 250°C. The catalyst Copper (II) oxalate is commercially available. The plasticizer has improved the thermal and mechanical properties of the matrix significantly. The addition of epoxy to the thermoset resin improved the (interfacial) bonding between the resin and carbon fiber. FTIR results suggest that the polymerization reaction of dicyanate results in the formation of trizine ring with phenolic group. SEM results show the interaction of bisphenol A dicyanate (BPADCy) monomer to form polymer matrix. SEM images also represent a uniform anchoring of matrix on the individual carbon filament. It is clear from thermal analysis that sample having 85% BPADCy and 15% polyetherimide (BPR-2) shows the greater thermal stability which is due to the reaction of epoxy with cyanate matrix.

APA, Harvard, Vancouver, ISO, and other styles

25

Wang, Xin, Lishuai Zong, Jianhua Han, Jinyan Wang, Cheng Liu, and Xigao Jian. "Toughening and reinforcing of benzoxazine resins using a new hyperbranched polyether epoxy as a non-phase-separation modifier." Polymer 121 (July 2017): 217–27. http://dx.doi.org/10.1016/j.polymer.2017.05.069.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Hayashita, T. "Influence of medium polarity upon selectivity and efficiency of alkali metal cation sorption by polyether carboxylic acid resins." Talanta 39, no. 7 (July 1992): 857–62. http://dx.doi.org/10.1016/0039-9140(92)80106-n.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Hu, Xiaolong, and Pengcheng Huang. "Influence of polyether chain and synergetic effect of mixed resins with different functionality on adhesion properties of epoxy adhesives." International Journal of Adhesion and Adhesives 25, no. 4 (August 2005): 296–300. http://dx.doi.org/10.1016/j.ijadhadh.2004.08.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Hayashita, Takashi, and Richard A. Bartsch. "Competitive sorption of alkali-metal and alkaline-earth-metal cations by carboxylic acid resins containing acyclic or cyclic polyether units." Analytical Chemistry 63, no. 17 (September 1991): 1847–50. http://dx.doi.org/10.1021/ac00017a033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Bednarczyk, Paulina, Izabela Irska, Konrad Gziut, and Paula Ossowicz-Rupniewska. "Novel Multifunctional Epoxy (Meth)acrylate Resins and Coatings Preparation via Cationic and Free-Radical Photopolymerization." Polymers 13, no. 11 (May 24, 2021): 1718. http://dx.doi.org/10.3390/polym13111718.

Full text

Abstract:

In this work, a series of novel multifunctional epoxy (meth)acrylate resins based on a low-viscosity aliphatic triepoxide triglycidyl ether of trimethylolethane (TMETGE) and acrylic acid (AA) or methacrylic acid (MMA) have been synthesized. Thanks to the performed modification, the obtained prepolymers have both epoxides as well as carbon–carbon double bonds and differ in their amount. The obtained results indicate that the carboxyl-epoxide addition esterification occurs in the presence of a catalyst (triphenylphosphine) at a temperature of 90 °C, whilst the required degree of conversion can be achieved simply by varying both the reagents ratio and reaction time. The structure of synthesized copolymers was confirmed by spectroscopic analyses (FT-IR, 1H NMR, 13C NMR) and studied regarding its nonvolatile matter content (NV), acid value (PAVs), as well as its epoxy equivalent value (EE). Due to the presence of both epoxy and double carbon–carbon pendant groups, one can apply two distinct mechanisms: (i) cationic ring-opening polymerization or (ii) free-radical polymerization to crosslink polymer chains. Synthesized epoxy (meth)acrylate prepolymers were further employed to formulate photocurable coating compositions. Hence, when cationic photoinitiators were applied, polyether-type polymer chains with pending acrylate or methacrylate groups were formed. In the case of free-radical polymerization, epoxy (meth)acrylates certainly formed a poly(meth)acrylate backbone with pending epoxy groups. Further, photopolymerization behavior and properties of cured coatings were investigated regarding some structural factors and parameters. Moreover, reaction rate coefficients of photo-cross-linking by both cationic ring-opening and free-radical photopolymerization of the received epoxy (meth)acrylate resins were determined via real-time infrared spectroscopy (RT-IR). Lastly, basic physicomechanical properties, such as tack-free time, hardness, adhesion, gloss, and yellowness index of cured coatings, were evaluated.

APA, Harvard, Vancouver, ISO, and other styles

30

Alam, Manawwer, and Naser M. Alandis. "Tannic acid-modified fatty amide anticorrosive coatings from Pongamia glabra oil." Anti-Corrosion Methods and Materials 61, no. 4 (May 27, 2014): 232–40. http://dx.doi.org/10.1108/acmm-01-2013-1234.

Full text

Abstract:

Purpose – The purpose of this investigation was to develop sustainable resource-based anticorrosive coating material using Pongamia glabra seed oil and tannic acid (TA), as well as to improve the coating properties. Design/methodology/approach – TA-modified fatty amide diol was synthesized by condensation polymerization. First, Pongamia glabra seed oil was converted to fatty amide diol (Pongamia oil fatty amide, PFA) that was further modified by TA with different parts per hundred of resin (10, 15 and 20) to develop a polyether fatty amide (PFA-TA). The confirmation of reaction between TA and PFA was carried out using Fourier transform infrared spectroscopy. The thermal behavior of PFA-TA was studied by thermogravimetric analyses. Coatings of several PFA-TA resins were applied to steel (i.e. plain carbon steel) coupons to investigate their physico-mechanical and anticorrosive performance. The corrosion protection performance was observed using AC impedance and polarization tests. Findings – TA-modified fatty amide coatings showed the highest scratch hardness of 2.5 kg, flexibility (1/8 inch) and gloss at 45° was 60-62. Among all compositions, PFA-TA15 showed the best physico-mechanical and anticorrosion performance. Corrosion tests of coated panels were examined in different corrosive media (3.5 wt per cent HCl, 3.5 wt per cent NaOH and 5.0 wt per cent NaCl) using potentiodynamic polarization and AC impedance measurements. PFA-TA may find application as an eco-friendly protective coating, and thermal analyses revealed that it can be safely used up to 300°C. Originality/value – This paper provides the development of protective coatings for steel from non-edible seed oil and TA to utilize sustainable resources.

APA, Harvard, Vancouver, ISO, and other styles

31

Cao, Zhongliang, Mingjun Dong, Kailei Liu, and Hongya Fu. "Temperature Field in the Heat Transfer Process of PEEK Thermoplastic Composite Fiber Placement." Materials 13, no. 19 (October 4, 2020): 4417. http://dx.doi.org/10.3390/ma13194417.

Full text

Abstract:

Under the effect of different process parameters, the temperature field inside the thermoplastic fiber is very complex and directly affects the fusion quality between the resins. Considering the heat transfer behavior of thermoplastic fiber polyether ether ketone (PEEK) as the research object, a mathematical model of heat transfer in the thermoplastic composite fiber placement with the relevant boundary conditions was established. Ansys Parametric Design Language (APDL) was used to generate the finite element model and simulate the transient process, not only to explore the influence of various process parameters on the temperature field, but also to build an online temperature field measurement system. The influence rules of placement process parameters and mold initial temperature with respect to the temperature field in the first layer were obtained. Combining the relationship between heating temperature and placement speed, when the first layer was laid, the placement process temperature could be quickly reached by low speed and high temperature. The temperature data were collected by the online detection system. Compared with the temperature data from the simulation, the error was below 8%, which verified the correctness of the heat transfer model. The academic research results will lay a theoretical foundation for the thermoplastic fiber placement.

APA, Harvard, Vancouver, ISO, and other styles

32

Hayashita, Takashi, Joung Hae Lee, Matthew G. Hankins, Jong Chan Lee, Jong Seung Kim, John M. Knobeloch, and Richard A. Bartsch. "Selective sorption and column concentration of alkali-metal cations by carboxylic acid resins with dibenzo-14-crown-4 subunits and their acyclic polyether analogs." Analytical Chemistry 64, no. 7 (April 1992): 815–19. http://dx.doi.org/10.1021/ac00031a021.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Trucillo, Paolo, Ernesto Di Maio, Amedeo Lancia, and Francesco Di Natale. "Selective Gold and Palladium Adsorption from Standard Aqueous Solutions." Processes 9, no. 8 (July 25, 2021): 1282. http://dx.doi.org/10.3390/pr9081282.

Full text

Abstract:

The intensive exploitation of resources on a global level has led to a progressive depletion of mineral reserves, which were proved to be insufficient to meet the high demand for high-technological devices. On the other hand, the continuous production of Waste from Electrical and Electronic Equipment (WEEE) is causing serious environmental problems, due to the complex composition of WEEE, which makes the recycling and reuse particularly challenging. The average metal content of WEEE is estimated to be around 30% and varies depending on the manufacturing period and brand of production. It contains base metals and precious metals, such as gold and palladium. The remaining 70% of WEEEs is composed of plastics, resins, and glassy materials. The recovery of metals from WEEEs is characterized by two main processes well represented by the literature: Pyrometallurgy and hydrometallurgy. Both of them require the pre-treatment of WEEEs, such as dismantling and magnetic separation of plastics. In this work, the selective adsorption of precious metals has been attempted, using copper, gold, and palladium aqueous solutions and mixtures of them. A screening on different adsorbent materials such as granular activated carbons and polymers, either as pellets or foams, has been performed. Among these, PolyEther Block Amide (PEBA) was elected as the most performing adsorbent in terms of gold selectivity over copper. Spent PEBA has been then characterized using scanning electron microscope, coupled with energy dispersive spectroscopy, demonstrating the predominant presence of gold in most analyzed sites, either in the pellet or foam form.

APA, Harvard, Vancouver, ISO, and other styles

34

Ge, Tiejun, Kaihong Tang, and Xiaojun Tang. "Preparation and Properties of Acetoacetic Ester-Terminated Polyether Pre-Synthesis Modified Phenolic Foam." Materials 12, no. 3 (January 22, 2019): 334. http://dx.doi.org/10.3390/ma12030334.

Full text

Abstract:

In the present study, acetoacetic ester-terminated polyether was selected as a modifier to prepare a new type of polyether phenolic resin, which was successfully prepared by pre-synthesis modification. It is used to prepare interpenetrating cross-linked network structure modified phenolic foam with excellent mechanical properties. Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1H NMR, 13C NMR) were used to characterize the molecular structure of the polyether phenolic resin. The results showed that the acetoacetic ester-terminated polyether successfully modified the phenolic resin and introduced a polyether skeleton into the resin structure. The effect of changing the added amount of acetoacetic ester-terminated polyether from 10% to 20% of the phenol content on the mechanical properties and microstructure of the modified phenolic foam was investigated. The results showed that when the amount of acetoacetic ester-terminated polyether was 16% the amount of phenol, this resulted in the best toughness of the modified foam, which had a bending deflection that could be increased to more than three times that of the base phenolic foam. The modified phenolic foam cell diameter was reduced by 36.3%, and the distribution was more uniform, which formed a denser network structure than that of the base phenolic foam. The bending strength was increased by 0.85 MPa, and the pulverization rate was as low as 1.3%.

APA, Harvard, Vancouver, ISO, and other styles

35

Su, Shunsheng, Haiqing Wang, Chuanjian Zhou, Yanxiang Wang, and Jianjun Liu. "Study on epoxy resin with high elongation-at-break using polyamide and polyether amine as a two-component curing agent." e-Polymers 18, no. 5 (September 25, 2018): 433–39. http://dx.doi.org/10.1515/epoly-2017-0252.

Full text

Abstract:

AbstractThis study aimed to improve the flexibility of E-51 epoxy resin by using polyamide/polyether amine as a two-component curing agent. Through solid state nuclear magnetic resonance (SSNMR), it was found that the cross-linking density of epoxy resin could be effectively reduced by adding the polyamide and polyether amine curing agent. The tensile tests showed that the elongation-at-break was remarkably improved. It was found by differential scanning calorimetry (DSC) that the curing behavior of the polyamide epoxy curing system varied with the addition of different polyether amine. Phase contrast microscope showed that phase separation occurred during the reaction of epoxy resin with the polyamide/polyether amine composite curing agent. In this paper, the modified epoxy resin was endowed with high elongation-at-break (>100%) and appropriate tensile strength (10~20 MPa).

APA, Harvard, Vancouver, ISO, and other styles

36

Zheng, Wenjian, Zhengjun Yao, Haiyan Lin, Jintang Zhou, Haishuo Cai, and Tongbaihui Qi. "Improved fracture toughness of carbon fiber fabric/epoxy composite laminates using polyether sulfone fibers." High Performance Polymers 31, no. 8 (December 10, 2018): 996–1005. http://dx.doi.org/10.1177/0954008318812151.

Full text

Abstract:

This study demonstrated that the addition of dissolvable polyether sulfone fibers to the interlaminar area of carbon fiber/epoxy composites can effectively increase the toughness with very high accuracy. Resin film infusion (RFI) is used to fabricate composite structures. RFI was applied to obtain polyether sulfone as an interleaf of chopped fibers between fabric piles of carbon fibers. The thermoplastic polyether sulfone fiber dissolved in the epoxy when it was cured at a high temperature. A phase-separated morphology with a polyether sulfone-rich secondary phase was formed during the curing process. Experimental results indicated that G Ic, which is the average value of Mode-I fracture toughness, was increased fivefold with the addition of 10 wt% polyether sulfone fiber (with respect to the gross content of the matrix). No detrimental effects were observed in other characteristics such as thermal stability, Young’s modulus, and tensile strength. In addition, the thermal and mechanical characteristics of neat epoxy–polyether sulfone blends were analyzed for comparison.

APA, Harvard, Vancouver, ISO, and other styles

37

Huang, Wei, Yuan Yao, Ying Huang, and Yunzhao Yu. "Surface modification of epoxy resin by polyether–polydimethylsiloxanes–polyether triblock copolymers." Polymer 42, no. 4 (February 2001): 1763–66. http://dx.doi.org/10.1016/s0032-3861(00)00393-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Yıldrım, Ayber, and Turgay Seçkin. "In SituPreparation of Polyether Amine Functionalized MWCNT Nanofiller as Reinforcing Agents." Advances in Materials Science and Engineering 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/356920.

Full text

Abstract:

In situpreparation of polyether amine functionalized cross-linked multiwalled carbon nanotube (MWCNT) nanofillers may improve the thermal and mechanical properties of the composites in which they are used as reinforcing agents. The reduction and functionalization of MWCNT using ethylenediamine in the presence of polyether amine produced stitched MWCNT's due to the presence of two amine (–NH2) functionalities on both sides of the polymer. Polyether amine was chosen to polymerize the carboxylated MWCNT due to its potential to form bonds with the amino groups and carboxyl groups of MWCNT which produces a resin used as polymeric matrix for nanocomposite materials. The attachment of the polyether amine (Jeffamine) groups was verified by TGA, FT-IR, XRD, SEM, and Raman spectroscopy. The temperature at which the curing enthalpy is maximum, observed by DSC, was shifted to higher values by adding functionalized MWCNT. SEM images show the polymer formation between MWCNT sheets.

APA, Harvard, Vancouver, ISO, and other styles

39

Huo, Ran, Zhiyu Zhang, Naveed Athir, Yanhao Fan, Jun Liu, and Ling Shi. "Designing high thermal conductivity of cross-linked epoxy resin via molecular dynamics simulations." Physical Chemistry Chemical Physics 22, no. 35 (2020): 19735–45. http://dx.doi.org/10.1039/d0cp02819c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Glatz, F. P., and R. Mdiilhaupt. "Semi-Interpenetrating Networks of Sulfur-Containing Bismaleimides." High Performance Polymers 5, no. 4 (August 1993): 297–305. http://dx.doi.org/10.1088/0954-0083/5/4/004.

Full text

Abstract:

Microphase-separated semi-interpenetrating polymer networks (semi-n Ns) were obtained by curing 4,4'-bismaleimidodiphenylmethane (BMII), which was advanced in situ with diamine-terminated oligo(phenylene sulfide) (PPS-DA), in the presence of a non-crosslinked linear high-T, aromatic polyether. Poly(thioether amide imide) (PTEAI) containing two phenylene sulfide units, Ultems 1000 poly(ether imide) (PEI) and benzophenone tetracarboxylic acid anhydride/diaminophenylindane polyimnide XU 218$ (PI) were used as non-crosslinked modifiers for the sulfur-containing BMI/PPS-DA resin system, which formed the continuous polymer matrix. Morphological and mechanical properties of the polyether-modified BMI/PPS-DA resin systems were investigated as a function of semi-n?,-compositions and polymer compatibilities. The soluble high-TA P1 gave improved strength and toughness without sacrificing the high T, of the resulting multiphase semi-iPNS.

APA, Harvard, Vancouver, ISO, and other styles

41

Berzins, Ritvars, Remo Merijs Meri, and Janis Zicans. "Compatibilizers Effect on Silyl-Terminated Polyether/Epoxy Resin System Mechanical and Rheological Properties." Key Engineering Materials 721 (December 2016): 441–45. http://dx.doi.org/10.4028/www.scientific.net/kem.721.441.

Full text

Abstract:

In this work we study influence of compatibilizers on tensile and rheological properties of new Silyl terminated polymer/Epoxy two component systems. In early works about that kind systems most of attention is devoted to polymers used (mainly silyl terminated polyether), while less attention is paid to catalysts, compatibilizers and additives [1-2]. One of the most important system elements are compatibilizers, while in this particular system silyl terminated polyether cannot react with epoxy groups directly. This work indicates that compatibilizer has a crucial meaning to reach material potential mechanical properties.

APA, Harvard, Vancouver, ISO, and other styles

42

Berzins, Ritvars, Remo Merijs Meri, and Janis Zicans. "Two Component Silyl-Terminated Polyether/Epoxy Resin Systems Mechanical and Rheological Properties." Solid State Phenomena 267 (October 2017): 28–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.267.28.

Full text

Abstract:

Two component model systems from Silyl-terminated polyether (SAX 520) and epoxy resin (D.E.R. 331) can produce higher mechanical properties than each system individually. This work is dedicated to explore two components (SAX 520/D.E.R. 331) systems and represent their benefits comparing to neat SAX 520 based system. Work shows that compositions with epoxy resin not only improves material mechanical properties, but also its stability after aging, workability time and adhesion on various substrates.

APA, Harvard, Vancouver, ISO, and other styles

43

Pujari, Malesh, Pooja Garg, and D. R. Prithviraj. "Evaluation of Accuracy of Casts of Multiple Internal Connection Implant Prosthesis Obtained From Different Impression Materials and Techniques: An In Vitro Study." Journal of Oral Implantology 40, no. 2 (April 1, 2014): 137–45. http://dx.doi.org/10.1563/aaid-joi-d-10-00207.

Full text

Abstract:

Movement of impression copings inside the impression material using a direct (open tray) impression technique during clinical and laboratory phases may cause inaccuracy in transferring the 3-dimensional spatial orientation of implants intraorally to the cast. Consequently, the prosthesis may require corrective procedures. This in vitro study evaluated the accuracy of 3 different impression techniques using polyether and vinyl polysiloxane (VPS) impression material to obtain a precise cast for multiple internal connection implants. A reference acrylic resin model with 4 internal connection implants was fabricated. Impressions of the reference model were made using 3 different techniques and 2 different impression materials. The study consisted of 24 specimens divided into 6 groups of 4 each. Impressions were poured with ADA type IV stone (Kalrock, Kalabhai Karson Pvt Ltd, Mumbai, India). All casts were evaluated for the positional accuracy (mm) of the implant replica heads using a profile projector. These measurements were compared to the measurements calculated on the reference resin model, which served as a control. Data were analyzed with 2-way analysis of variance (ANOVA) followed by Bonferroni multiple comparison procedures to evaluate group means. The results revealed significant difference for anterior implant distance between the 2 impression materials (P < .01) and also among the 3 different techniques (P < .05). The lowest mean variation was found with the polyether impression material and the splinted technique. For posterior implants, the results suggested no significant difference between the 2 impression materials (P ≥ .05). Although results were not statistically significant, the polyether impression material showed the lowest mean variation as compared to the VPS impression material. However, there was a significant difference among the 3 different techniques (P < .05). Among the 3 different techniques, the lowest mean variation between 2 posterior implants was found in the splinted technique. Casts obtained from impression techniques using square impression copings splinted together with autopolymerizing acrylic resin prior to the impression procedure were more accurate than casts obtained from impressions with nonmodified implant impression copings and with airborne particle–abraded, adhesive-coated copings. Casts obtained from polyether impression material were more accurate than casts obtained from vinyl polysiloxane impression material.

APA, Harvard, Vancouver, ISO, and other styles

44

Guo, Li Ying, Jin Lin Liu, Peng Cheng Huang, Jun Hai He, Shi Yang Bai, and Liang Tong. "Research of Epoxy Resin Modified by Polyether Imidazole Ionic Liquid." Advanced Materials Research 926-930 (May 2014): 198–201. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.198.

Full text

Abstract:

Polyether imidazole ionic liquid (PIIL) was blended with general-purpose epoxy resin (EP). PIIL/EP was cured by ethylenediamine curing agent. The structure of PIIL/EP was determined by FTIR. The effect of the content of PIIL on the impact strength of EP was studied. The toughness of epoxy resin could be significantly improved by PIIL. The impact strength of the modified EP was improved with the increase of PIIL and leveled off when the content of PIIL was more than 45%, and the modified EP showed rubber elasticity obviously.

APA, Harvard, Vancouver, ISO, and other styles

45

Jin, X. C., L. Y. Guo, L. L. Deng, and H. Wu. "Study on epoxy resin modified by polyether ionic liquid." IOP Conference Series: Materials Science and Engineering 213 (June 2017): 012037. http://dx.doi.org/10.1088/1757-899x/213/1/012037.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Raju, Minu. "Comparison of Exothermic Release during the Polymerization of Four Materials used to fabricate Provisional Restorations." International Journal of Prosthodontics and Restorative Dentistry 4, no. 1 (2014): 1–5. http://dx.doi.org/10.5005/jp-journals-10019-1097.

Full text

Abstract:

ABSTRACT Background and objectives This in vitro study compared and determined the temperature increase in the pulp chamber of permanent maxillary first premolar teeth placed in contact with different resins used for the fabrication of provisional resto- rations. Materials and methods Polymethyl methacrylate (DPI), poly- ethyl methacrylate (SNAP), polyvinylethyl methacrylate (TRIM), bis-acrylic composite (Protemp II) were compared with respect to their exothermic properties during polymerization. Eighty freshly extracted maxillary first premolars were prepared for complete coverage restoration were placed in an acrylic resin block. A thermal probe connected to a digital thermometer was placed into the pulp chamber. Specimens were submerged in a water bath to simulate intraoral conditions. The provisional materials were manipulated according to manufacturer's instructions. The resin mix was placed into template and was then positioned on the prepared tooth. The temperature was recorded during the polymerization at 30-second intervals until it was evident that the peak temperature had been reached. After complete polymerization, the template was removed from the tooth and the provisional crown was retrieved. Data was analyzed with one-way ANOVA and Bonferroni multiple comparisons test. Results Mean temperature increase for the provisional crown fabrication ranged from 38.78°C, 37.79°C, 37.71°C and 35.88°C for polymethyl methacrylate, polyethyl methacrylate, polyvinyl- ethyl methacrylate and bis-acrylic composite respectively. Polymethyl methacrylate, polyethyl methacrylate and bisacrylic composite were highly significant. Interpretation and conclusion All the materials used were in the safer limit. Hence, by comparing all the four material, Bis-acrylic composite showed least temperature rise in pulp chamber. How to cite this article Raju M. Comparison of Exothermic Release during the Polymerization of Four Materials used to fabricate Provisional Restorations. Int J Prosthodont Restor Dent 2014;4(1):1-5.

APA, Harvard, Vancouver, ISO, and other styles

47

Li, Jian, Xun Zhang Yu, and Kai Zhang. "Absorptive and Biodegraded Polyurethane Foamed Urea." Advanced Materials Research 152-153 (October 2010): 131–35. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.131.

Full text

Abstract:

In this article, konjac flour, super absorptive resin and pellet urea were added into flexible polyurethane foamed plastic with polyether polyol and isocyanate as the raw materials by a new water-foamed technology to manufacture a kind of absorptive and biodegraded polyurethane foamed fertilizer. Polyurethane foam was used as a carrier material and konjac flour was used as a biodegradable agent. The results showed that the slow-release velocity of urea could be controlled by regulating the densities of polyurethane foams, the content of konjac flour and super absorptive resin. The carrier material could be degraded konjac flour by naturally.

APA, Harvard, Vancouver, ISO, and other styles

48

Soares, Bluma G., Viviane Gonçalez, Rurik Galimberti, Alex S. Sirqueira, Fabio L. Barcia, and Renata A. Simão. "Toughening of an epoxy resin with an isocyanate-terminated polyether." Journal of Applied Polymer Science 108, no. 1 (2008): 159–66. http://dx.doi.org/10.1002/app.26991.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Molinero-Mourelle, Pedro, Miguel Gómez-Polo, Cristina Gómez-Polo, Rocio Ortega, Jaime del Río Highsmith, and Alicia Celemín-Viñuela. "Preliminary Study on the Assessment of the Marginal Fit of Three-Dimensional Methacrylate Oligomer Phosphine Oxide Provisional Fixed Dental Prostheses Made by Digital Light Processing." Prosthesis 2, no. 3 (September 7, 2020): 240–45. http://dx.doi.org/10.3390/prosthesis2030021.

Full text

Abstract:

This article aimed to assess the marginal fit of methacrylate-oligomer-phosphine-oxide curable-resin provisional-fixed dental prostheses made by digital-light-processing (DLP) three-dimensional (3D) printing. A stainless-steel master model with two abutments was scanned, and five three-unit provisional bridges were designed and printed in VITA shade A3.5 curable resin in 50 μm-thick layers. The marginal fit of each abutment was measured at six points using a profile projector. A descriptive data analysis of the fit measurements was performed by descriptive and explorative processes with the SPSS software. The curable-resin provisional restorations made by DLP 3D printing reached values of 46.37 μm (SD: 29.58 μm), which were considered clinically acceptable, with values similar to polyethylene-methacrylate and polyether-ether-ketone provisional restorations.

APA, Harvard, Vancouver, ISO, and other styles

50

Zhu, Li Bin, Bo Han, Ji You Gu, Yan Hua Zhang, Hai Yan Tan, and Ying Feng Zuo. "Preparation of Water-Resistance Plywood with UF Resin Modified by Emulsifiable Polyisocyanate." Applied Mechanics and Materials 26-28 (June 2010): 1056–60. http://dx.doi.org/10.4028/www.scientific.net/amm.26-28.1056.

Full text

Abstract:

The purpose of the study was to manufacture water-resistance plywood with using UF resin modified by emulsifiable polyisocyanate. The emulsifiable polyisocyanate which contains plenty of hydrophilic segments and teminal isocyanate groups were synthesized by reaction between various kinds of polyether polyols and polymeric methane dipthenyl diisocyanate (pMDI). A type of composite adhesive was obtained from the mixture of emulsifiable polyisocyanate and urea formaldehyde resin. The process parameters, such as the molar ratio of –NCO and –OH, mass fraction of emulsifiable polyisocyanate in UF resin and accessory ingredient have a great influence on the composite adhesive. X-ray photoelectron spectroscopy (XPS) had been used to analyze the chemical structure of bonding interface. The results showed that the composite adhesive consisting of UF resin and emulsifiable polyisocyanate content of 7.5% and kaolin content of 1.5% was used in plywood with high physical and mechanical properties, water resistance and low formaldehyde emission.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!