Log in

Relevant bibliographies by topics / Ethylene copolymer / Journal articles

To see the other types of publications on this topic, follow the link: Ethylene copolymer.

Journal articles on the topic 'Ethylene copolymer'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 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 'Ethylene copolymer.'

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

Dang, Yan Liu, Yun Zhao, Chao Xiang Wang, Qing Ze Jiao, Han Sheng Li, and Qin Wu. "Synthesis of Ethylene-Propylene Copolymer and their Structures." Advanced Materials Research 1035 (October 2014): 149–54. http://dx.doi.org/10.4028/www.scientific.net/amr.1035.149.

Full text

Abstract:

This work reports copolymerization of ethylene-propylene (EP) using a novel phenoxy–ester ligated titanium catalyst. Copolymerization reactions were conducted in toluene at 70 °C with varied E/P flow ratios. Fourier transform infrared spectroscopy, X-ray diffractometer, nuclear magnetic resonance spectroscopy and differential scanning calorimetry analysis were performed to characterize the structures, compositions and glass transition temperatures of the copolymers. The results show that ethylene-propylene copolymers are random polymers and the link ratios of ethylene to propylene are between

APA, Harvard, Vancouver, ISO, and other styles

2

Trung, Nam Vu, Mai Ngoc Nguyen, Anh Nguyen Thi Ngoc, Ni Pham Thi, Tung Tran Quang, and Thuy Tran Thi. "Synthesis and Characterizations of Biobased Copolymer Poly(ethylene-co-butylene 2,5-Furandicarboxylate)." International Journal of Polymer Science 2021 (August 7, 2021): 1–8. http://dx.doi.org/10.1155/2021/9104546.

Full text

Abstract:

Homopolymers and copolymers derived from 2,5-furandicarboxylic acid have been extensively studied for their potential in the development of sustainable plastics. This research definitely spotlighted the synthesis of poly(ethylene-co-butylene 2,5-furandicarboxylate) copolymer via the two-step melting polycondensation with various ethylene glycol/1,4-butanediol molar ratios. The structural characterization of the obtained biobased copolymer was carried out by ATR-FTIR and 1H NMR. The average molecular weight of the obtained copolymer was determined by the intrinsic viscosity measurements. It was

APA, Harvard, Vancouver, ISO, and other styles

3

Sriromreun, P., Mantana Opaprakasit, Atitsa Petchsuk, and Pakorn Opaprakasit. "Synthesis and Characterization of Degradable Poly(Ethylene Terephthalate-co-Lactic Acid) and its Blends." Advanced Materials Research 55-57 (August 2008): 789–92. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.789.

Full text

Abstract:

Because of their respective advantages, the combination of good material properties of poly(ethylene terephthalate) (PET) and degradability of polylactic acid (PLA) is researched as degradable copolymer for packaging and agricultural applications. Poly(ethylene terephthalate-co-lactic acid) (PET-co-PLA) has been synthesized by employing polycondensation of mixtures of dimethyl terephthalate (DMT), lactic acid (LA) and ethylene glycol (EG), using tin(II) octoate as a catalyst. A chain-extending reagent, hexamethylene diisocyanate (HMDI), was then used in the subsequent step to increase the chai

APA, Harvard, Vancouver, ISO, and other styles

4

Mazurek-Budzynska, Magdalena, Maria Balk, Marc Behl, and Andreas Lendlein. "Polyethyleneimine and Poly(ethylene glycol) Functionalized Oligoester Based Polycationic Particles." MRS Advances 3, no. 50 (2018): 3033–40. http://dx.doi.org/10.1557/adv.2018.407.

Full text

Abstract:

ABSTRACTPolycationic particles based on a degradable oligoester core are interesting candidate materials for the transfection of polyanionic macromolecules like DNA, which would enable the degradation after delivery of condensed molecules. Good transfection efficiencies can be obtained when the size of the polyplex (containing both polycationic nanoparticles and polyanionic macromolecules) does not exceed 120 nm. Therefore, here we explored how size, but also dispersity, and surface charge of these carrier systems can be adjusted by variation of the block copolymer composition or the presence

APA, Harvard, Vancouver, ISO, and other styles

5

Suen, Wu, Jennifer Percy, Shaw L. Hsu, Igor A. Kaltashov, and Howard D. Stidham. "Influence of Polyether Copolymer Configuration on Polyurethane Reaction: A Mass Spectrometry Analysis." Cellular Polymers 22, no. 1 (2003): 23–42. http://dx.doi.org/10.1177/026248930302200102.

Full text

Abstract:

Matrix Assisted Laser Desorption Ionization Time-of-Flight mass spectrometry has been applied to obtain the molecular weight distribution of two polyether copolymers containing ethylene oxide and propylene oxide units. The measured molecular weights and their distributions were surprisingly different from the expected. Based upon the natural isotopic abundance, it was possible to provide a quantitative description of the number of ethylene oxide and propylene oxide units as a function of molecular weight. Important information on composition drift and heterogeneity can be obtained from the 3-D

APA, Harvard, Vancouver, ISO, and other styles

6

Kakhramanov, N. T., I. V. Bayramova, V. S. Osipchik та ін. "PHYSICOMECHANICAL PROPERTIES OF NANOCOMPOSITES BASED ON COPOLYMERS OF ETHYLENE WITH α-OLEFINS AND CLINOPTILOLITE". Azerbaijan Chemical Journal, № 4 (12 грудня 2020): 22–27. http://dx.doi.org/10.32737/0005-2531-2020-4-22-27.

Full text

Abstract:

The results of studying the effect of clinoptilolite concentration on the properties of nanocomposites based on of ethylene with butylene and of ethylene with hexene copolymer are presented. The effect of clinoptilolite particle size on ultimate tensile stress, elongation at break, flexural modulus, heat resistance, and melt flow index of composites was studied. It is shown that nanocomposites based on ethylene copolymers are characterized by higher values of physicomechanical properties. The additional use of ingredients such as alizarin and calcium stearate contributes to a significant impro

APA, Harvard, Vancouver, ISO, and other styles

7

Kacarevic-Popovic, Zorica, Bojana Secerov, Milena Marinovic-Cincovic, Zoran Nedic, and Slobodan Jovanovic. "Modification of ethylene-norbornene copolymer by Gamma irradiation." Chemical Industry 60, no. 11-12 (2006): 311–15. http://dx.doi.org/10.2298/hemind0612311k.

Full text

Abstract:

The possibility of modifying polyethylene and many other polymers with high energy radiation has led to many useful applications. Due to their new combination of properties and the shortage of experimental data, the radiolysis of a new class of materials, cyclo-olefin copolymers (COC), polymerised from norbornene and ethylene using metallocene catalysts, is of great interest to the study of radiation chemistry and the physics of polymeric systems. Ethylenenorbornene copolymer, pristine and containing an antioxidant were subjected to gamma irradiation in the presence of air and in water. The ir

APA, Harvard, Vancouver, ISO, and other styles

8

Cha, Sang Ho. "Preparation of Gold Nanocrystals Having Various Morphologies under Polymeric Bulk Phase." Applied Mechanics and Materials 548-549 (April 2014): 321–25. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.321.

Full text

Abstract:

A novel synthetic approach for gold nanocrystals using triblock copolymer as a polymeric template was described. The triblock copolymer used in this study was poly (ethylene oxide)20-poly (propylene oxide)70-poly (ethylene oxide)20 with hydroxy or thiol end-functional groups. The complexes of HAuCl4 and triblock copolymers were prepared by mixing and drying. After exposed to the sunlight for a few days, the gold nanocrystals, which have different sizes and shapes according to the ripening time, end functional groups, and gold salt concentrations, were obtained. The optical properties of the go

APA, Harvard, Vancouver, ISO, and other styles

9

Lin, Hu Bin, Chong Min Du, Jian Yi Zhu та Wen Yao Liang. "Morphology and Mechanical Properties of Compatibilized β Nucleated Polypropylene/Polystyrene Blends". Advanced Materials Research 902 (лютий 2014): 63–65. http://dx.doi.org/10.4028/www.scientific.net/amr.902.63.

Full text

Abstract:

The β nucleated polypropylene (PP), uncompatibilized β nucleated PP/polystyrene (PS) and compatibilized β nucleated PP/PS blends were prepared on a twinscrew extruder.and then,added into compatibilizers styrene-ethylene-propylene block copolymer (SEP) or twostyrene-ethylene-butylene-styrene block copolymers (SEBS) with different content of styrene.The morphology and mechanical properties of these composites were investigated.

APA, Harvard, Vancouver, ISO, and other styles

10

Lin, Hu Bin, Chong Ming Du, Jian Yi Zhu та Wen Yao Liang. "Non-Isothermal Crystallization Behavior and Kinetics of Compatibilized β Nucleated Polypropylene/Polystyrene Blends". Advanced Materials Research 893 (лютий 2014): 291–94. http://dx.doi.org/10.4028/www.scientific.net/amr.893.291.

Full text

Abstract:

The β nucleated polypropylene (PP), uncompatibilized β nucleated PP/polystyrene (PS) and compatibilized β nucleated PP/PS blends were prepared on a twinscrew extruder.and added into compatibilizers styrene-ethylene-propylene block copolymer (SEP) or two styrene-ethylene-butylen- e-styrene block copolymers (SEBS) with different content of styrene.The crystallization characteristic, melting behavior and crystallization kinetics of these composites were studied.

APA, Harvard, Vancouver, ISO, and other styles

11

Pellecchia, Claudio, and Leone Oliva. "Ethylene—Styrene Copolymerization." Rubber Chemistry and Technology 72, no. 3 (1999): 553–58. http://dx.doi.org/10.5254/1.3538817.

Full text

Abstract:

Abstract Ethylene—styrene copolymers are new materials developed within the last decade using the new homogeneous olefin polymerization catalysts (generally referred to as “metallocene catalysts”). By proper selection of the catalytic system and the reaction conditions, a variety of copolymers with different compositions, structures, and properties can be obtained. Thus, copolymers containing a very low amount of styrene (or p-methylstyrene) on a substantially polyethylenic backbone are crystalline thermoplastics, which could be used to produce functionalized PEs. Increasing the styrene conten

APA, Harvard, Vancouver, ISO, and other styles

12

Rahaman, Mostafizur, M. Anwar Parvez, J. B. P. Soares, and I. A. Hussein. "Effect of Polymerization Conditions on Thermal and Mechanical Properties of Ethylene/1-Butene Copolymer Made with Ziegler-Natta Catalysts." International Journal of Polymer Science 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/654260.

Full text

Abstract:

The effect of polymerization conditions on thermal and mechanical properties of ethylene/1-butene copolymers synthesized through titanium-magnesium-supported Ziegler-Natta catalysts was studied. The increase in hydrogen pressure leads to a decrease in molecular weight (MW), storage modulus, and melting temperature. However, it yields an increase in molecular weight distribution (MWD),tan⁡δ, % crystallinity, tensile modulus, yield stress, and strain at break. The effects of ethylene pressure and polymerization temperature on the copolymer MW, MWD and thermal and mechanical properties have been

APA, Harvard, Vancouver, ISO, and other styles

13

Liu, Lian, Pei Wang, Chao Qu, Zhi Yong Wei та Min Qi. "Synthesis, Characterization and Crystallization of Poly(Ethylene Glycol)-b-Poly(ε-Caprolactone)". Advanced Materials Research 152-153 (жовтень 2010): 1665–68. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.1665.

Full text

Abstract:

A family of poly(ethylene glycol)-b-poly(ε-caprolactone) (PEG-PCL) were synthesized in high yields by the ring-opening polymerization of monomethoxy-terminated poly(ethylene glycol) (mPEG) with ε-caprolactone in the presence of stannous octoate (Sn(Oct)2). Their crystallization behaviors were studied by DSC, XRD. The results illustrated that crystallization behaviors of the copolymers depended on the copolymer composition and the relative length of each block in copolymers. The melting peak of PCL block appeared gradually in the XRD patterns and DSC curves in copolymers, with increasing of the

APA, Harvard, Vancouver, ISO, and other styles

14

Shaikhutdinov, Y. M., S. Kh Khussain, N. Zh Seitkaliyeva, A. Zh Zhenissova, and Z. G. Akkulova. "Surface - Active and Complexforming Copolymers of Sodium 2-acrylamido-2-methylpropanesulfonate with Ethyleneglycol Vinyl Ether." Eurasian Chemico-Technological Journal 15, no. 4 (2015): 313. http://dx.doi.org/10.18321/ectj237.

Full text

Abstract:

<p>A new water-soluble polyelectrolyte - the copolymer of sodium 2-acrylamido-2-methylpropanesulfonate and ethylene glycol vinyl ether has been synthesized by free-radical copolymerization in aqueous medium. Synthesis of the linear structure water-soluble copolymer of sodium 2-acrylamido-2-methylpropanesulfonate (Na-AMPS) and ethylene glycol vinyl ether (EGVE) has been confirmed by IR spectroscopy method, potentiometric titration and viscometer. The concentration behavior of the reduced viscosity of copolymer solutions that is typical for polyelectrolytes has been revealed. The reactivit

APA, Harvard, Vancouver, ISO, and other styles

15

Wu, Guohui, Shelli L. Frey, Stacey A. Maskarinec, and Ka Yee C. Lee. "Triblock Copolymer as an Effective Membrane-Sealing Material." MRS Bulletin 31, no. 7 (2006): 532–35. http://dx.doi.org/10.1557/mrs2006.138.

Full text

Abstract:

An intact cell membrane serves as a permeable barrier, regulating the influx and efflux of ions and small molecules. When the integrity of the membrane is compromised, its barrier function is also disrupted, threatening the survival of the cell. Triblock copolymer surfactants of the form poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) have been shown to help seal structurally damaged membranes, arresting the leakage of intracellular materials.In order to understand how this particular family of triblock copolymers helps seal damaged membranes, model lipid monolayer and bilayer

APA, Harvard, Vancouver, ISO, and other styles

16

Lipowska-Kur, Daria, Łukasz Otulakowski, Barbara Trzebicka, Alicja Utrata-Wesołek, and Andrzej Dworak. "Thermoresponsive Nanogels of Modified Poly((di(ethylene glycol) methyl ether methacrylate)-co-(2-aminoethyl methacrylate))s." Polymers 12, no. 8 (2020): 1645. http://dx.doi.org/10.3390/polym12081645.

Full text

Abstract:

A series of copolymers of di(ethylene glycol) methyl ether methacrylate (D) and 2-aminoethyl methacrylate (A) (P(D-co-A)) with variable ratios of comonomers were synthesized using atom transfer radical polymerization. Then, the amino groups of obtained copolymers were modified to clickable azide or prop-2-yn-1-yl carbamate groups. A thermoresponsive copolymers were obtained with the value of cloud point temperature (TCP) dependent on the type and number of functional groups in the copolymer and on the concentration of solutions. For P(D-co-A) copolymers, the TCP increased with increasing conte

APA, Harvard, Vancouver, ISO, and other styles

17

&NA;. "Ethylene-vinyl alcohol copolymer." Reactions Weekly &NA;, no. 1323 (2010): 21. http://dx.doi.org/10.2165/00128415-201013230-00070.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

&NA;. "Ethylene vinyl alcohol copolymer." Reactions Weekly &NA;, no. 1140 (2007): 10–11. http://dx.doi.org/10.2165/00128415-200711400-00033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Kipkemboi, Pius, Ali Khan, Björn Lindman, and Viveka Alfredsson. "Phase behaviour and structure of amphiphilic poly(ethylene oxide)-poly(propylene oxide) triblock copolymers ((EO)4(PO)59(EO)4 and (EO)17(PO)59(EO)17) in ternary mixtures with water and xylene." Canadian Journal of Chemistry 81, no. 8 (2003): 897–908. http://dx.doi.org/10.1139/v03-102.

Full text

Abstract:

The isothermal ternary phase behaviour and structure of amphiphilic copolymerwaterxylene systems was investigated for two poly(ethylene oxide)poly(propylene oxide) (PEOPPO) triblock copolymers, (EO)4(PO)59(EO)4 and (EO)17(PO)59(EO)17, at 25°C. The phase boundaries were identified using 2H NMR and inspection under polarized light. The microstructure and structural length scales in the lyotropic liquid crystalline phases were determined and characterized by small-angle X-ray scattering. The amounts and relative proportions of the selective solvents can modulate the resulting microstructures,

APA, Harvard, Vancouver, ISO, and other styles

20

Golas, Patricia L., Nicolay V. Tsarevsky, Brent S. Sumerlin, Lynn M. Walker, and Krzysztof Matyjaszewski. "Multisegmented Block Copolymers by 'Click' Coupling of Polymers Prepared by ATRP." Australian Journal of Chemistry 60, no. 6 (2007): 400. http://dx.doi.org/10.1071/ch07073.

Full text

Abstract:

Multisegmented block copolymers were prepared by the step-growth click coupling of well-defined block copolymers synthesized by atom transfer radical polymerization (ATRP). α,ω-Diazido-terminated polystyrene-block-poly(ethylene oxide)-block-polystyrene was coupled with propargyl ether in N,N-dimethylformamide in the presence of a CuBr/N,N,N´,N´´,N´´-pentamethyldiethylenetriamine catalyst. The preparation of multisegmented block copolymers was also demonstrated by the click coupling of propargyl ether with another diazido-terminated triblock copolymer, poly(n-butyl acrylate)-block-poly(methyl m

APA, Harvard, Vancouver, ISO, and other styles

21

Steinman, Noam Y., Noam Y. Bentolila, and Abraham J. Domb. "Effect of Molecular Weight on Gelling and Viscoelastic Properties of Poly(caprolactone)–b-Poly(ethylene glycol)–b-Poly(caprolactone) (PCL–PEG–PCL) Hydrogels." Polymers 12, no. 10 (2020): 2372. http://dx.doi.org/10.3390/polym12102372.

Full text

Abstract:

Hydrogels based on poly(caprolactone)–b-poly(ethylene glycol)–b-poly(caprolactone) (PCL–PEG–PCL) have been evaluated extensively as potential injectable fillers or depots for controlled release of drugs. Common drawbacks of these copolymer systems include instability of aqueous solutions and low mechanical strength of gels, issues which are commonly overcome by adding pendant groups to the end of the copolymer chains. Here, a systematic study of the effects of increasing polymer molecular weight (MW) is presented, utilizing PEG blocks of MW 2, 4 or 8 kDa. Triblock copolymers were prepared by t

APA, Harvard, Vancouver, ISO, and other styles

22

MA, HUI-RU, JIAN-GUO GUAN, and RUN-ZHANG YUAN. "SELF-ASSEMBLY MORPHOLOGIES AND ELECTRORHEOLOGICAL PROPERTIES OF POLYANILINE-POLY(ETHYLENE GLYCOL)- POLYANILINE TRIBLOCK COPOLYMERS." International Journal of Modern Physics B 21, no. 28n29 (2007): 4961–66. http://dx.doi.org/10.1142/s021797920704589x.

Full text

Abstract:

The self-assembly properties and ER effects of the Polyaniline-Poly(ethylene glycol)-Polyaniline (PAn-PEG-PAn) triblock copolymers were studied in this paper. The results indicate that with the increase of solubility parameter of the solvent, PAn-PEG-PAn copolymers form into different morphologies of spheriods, vesicles and rods. PAn-PEG-PAn copolymers with vesicles morphology show the highest polarization strength, while those with rods have the most rapid polarization rate. Among the PAn-PEG-PAn copolymers of different morphologies, the PAn-PEG-PAn copolymer vesicles show the strongest ER ef

APA, Harvard, Vancouver, ISO, and other styles

23

Moura, Isabel, Ana Vera Machado, Regina Nogueira, and V. Bounor-Legare. "Synthesis of Biodegradable Copolymers Based on Ethylene Vinyl Acetate and Polylactic Acid." Materials Science Forum 636-637 (January 2010): 819–24. http://dx.doi.org/10.4028/www.scientific.net/msf.636-637.819.

Full text

Abstract:

In the present study biodegradable copolymers of ethylene vinyl acetate and polylactic acid were synthesized using transesterification reactions, the structure, morphology, mechanical properties and biodegradability of the produced materials were characterized. Ethylene vinyl acetate was modified with polylactic acid in an internal mixer using titanium propoxide as transesterification catalyst. The graft copolymers were characterized by elemental analysis, infrared spectroscopy, rheology, scanning electron microscopy and thermal analysis. Selective extractions for all copolymers were made, and

APA, Harvard, Vancouver, ISO, and other styles

24

Walton, Kim L. "Metallocene Catalyzed Ethylene/Alpha Olefin Copolymers Used in Thermoplastic Elastomers." Rubber Chemistry and Technology 77, no. 3 (2004): 552–68. http://dx.doi.org/10.5254/1.3547836.

Full text

Abstract:

Abstract Thermoplastic elastomers (TPEs) continue to be a focus of significant research as well as commercial development in the rubber industry since their origin over forty years ago. A wide variety of TPEs exist today. Ethylene copolymer and terpolymer based elastomers continue to play an increasing role in this arena. New ethylene copolymers and terpolymers, based upon metallocene catalysis, have further diversified the TPE portfolio. Compounders are now using these new elastomers as modifiers for existing TPEs as well as the principle elastomer in new TPEs

APA, Harvard, Vancouver, ISO, and other styles

25

Zhao, Ruobing, and Kenneth J. Shea. "Gradient Methylidene-Ethylidene Copolymer via C1 Polymerization: an Ersatz Gradient Ethylene-Propylene Copolymer." ACS Macro Letters 4, no. 5 (2015): 584–87. http://dx.doi.org/10.1021/acsmacrolett.5b00218.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Prodanovic, Radivoje, Nenad Milosavic, Slobodan Jovanovic, Tanja Cirkovic-Velickovic, Zoran Vujcic та Ratko Jankov. "Stabilization of α-glucosidase in organic solvents by immobilization on macroporous poly(GMA-co-EGDMA) with different surface characteristics". Journal of the Serbian Chemical Society 71, № 4 (2006): 339–47. http://dx.doi.org/10.2298/jsc0604339p.

Full text

Abstract:

?-Glucosidase from baker?s yeast was immobilized on macroporous copolymers of ethylene glycol dimethacrylate and glycidyl methacrylate, poly(GMA-co-EGDMA) with various surface characteristics and pore sizes ranging from 44 nm to 270 nm. Immobilization was done by glutaraldehyde on the copolymer previously modified with 1,2-diaminoethane. The specific activity of the obtained immobilized enzyme varied from 27 to 81 U/g, depending on the employed copolymer. The half lives of the immobilized enzyme in cosolvents were influenced by the surface characteristics of the copolymer, ranging from 60 to 1

APA, Harvard, Vancouver, ISO, and other styles

27

Zhou, Yong, and Bing Liu. "Synthesis and Self-Assembly Behavior of Chiral Amphiphilic Diblock Copolymers Bearing L-Phenylalanine." Advanced Materials Research 345 (September 2011): 334–37. http://dx.doi.org/10.4028/www.scientific.net/amr.345.334.

Full text

Abstract:

Novel chiral amphiphilic diblock copolymers bearing L-phenylalanine was synthesized using a “click” reaction of N3-L-phenylalanine and MPEO-b-PGPE. The structure and composition of copolymers were characterized by 1H-NMR and elemental analysis. Additionally, the self-assembly behavior of these chiral copolymers was investigated in sodium dihydrogen phosphate buffer (pH 4.5): the CMC of copolymer MPEO-b-PGTP determined by the measurement of surface tension was 2.1 mg/mL; the size and morphology of the micelles were studied using TEM; the specific optical rotation ([α]25D) of the micellar soluti

APA, Harvard, Vancouver, ISO, and other styles

28

Tanimoto, Satoshi, Naoto Yagi, and Hitoshi Yamaoka. "Application of Thermosensitive Peptide Copolymer Gels to Removal of Endocrine Disruptor." Research Letters in Materials Science 2009 (2009): 1–4. http://dx.doi.org/10.1155/2009/597308.

Full text

Abstract:

Poly(L-leucine)-block-poly(ethylene glycol)-block-poly(L-leucine) triblock copolymers were synthesized by a ring-opening polymerization ofα-amino acid N-carboxyanhydride with amino-terminated PEG as an initiator. The chloroform solution of these peptide copolymers showed a thermo-sensitive sol-gel transition. The transition temperature varied as a function of the length of peptide segments. Additionally, we used these peptide copolymers to remove an endocrine disruptor such as bisphenol A from its aqueous solution. As a result, it became clear that the peptide copolymer gel used in this study

APA, Harvard, Vancouver, ISO, and other styles

29

Zhou, Hao, Qing Hong Liang, Xiang Ke Shi, Li Hua Lu, Li Qun Zhang, and Dong Mei Yue. "Self-Assemble Behavior of Amphiphilic Diblock Copolymer of Methoxy Poly (Ethylene Glycol)/Polyester." Advanced Materials Research 295-297 (July 2011): 11–15. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.11.

Full text

Abstract:

Amphiphilic diblock copolymers based on methoxy polyethylene glycol (MePEG), 1, 6-hexanediol and maleic anhydride with different molar composition were synthesized by solution polycondensation. Self-assemble behavior of amphiphilic diblock copolymer in different solvents by dialyzing technique was discussed. The micelle morphologhy was observed by TEM. It was found that well core-shell MePEG1900/Polyester 2162 copolymer nanoparticles can be formed by self-assemble in acetone solution. In addition, the size of nanospheres measured using dynamic light scattering exhibited a narrow monodisphere s

APA, Harvard, Vancouver, ISO, and other styles

30

Nakafuku, Chitoshi, Kenji Takaoka, and Katsuhiko Katsura. "Melting of Ethylene–Tetrafluoroethylene Copolymer." Polymer Journal 31, no. 6 (1999): 557–59. http://dx.doi.org/10.1295/polymj.31.557.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Ramp, Floyd L. "Chlorination of ethylene-propylene copolymer." Journal of Polymer Science Part C: Polymer Symposia 24, no. 1 (2007): 247–56. http://dx.doi.org/10.1002/polc.5070240122.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Baker, George L., and R. F. Buesinger. "The Ethylene Methyl Acrylate Copolymer." Journal of Plastic Film & Sheeting 3, no. 2 (1987): 112–17. http://dx.doi.org/10.1177/875608798700300205.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Xu, Qiu Shu, Lian Tang, Chao Sheng Wang, Biao Wang, and Hua Ping Wang. "Effects of Poly(Ethylene Glycol) Segment on Physical and Chemical Properties of Poly(Ether Ester) Elastomers." Materials Science Forum 898 (June 2017): 2147–57. http://dx.doi.org/10.4028/www.scientific.net/msf.898.2147.

Full text

Abstract:

Poly (ether ester) elastomer, a segmented copolymer, recently has attracted a wide attention for its unique properties such as elasticity, low temperature impact resistance and chemistry resistance. In this work, a range of poly (ether ester) s were synthesized via a two-step polymerization method using poly (ethylene terephthalate) (PET) as rigid segment and poly (ethylene glycol) (PEG) as flexible segment. The effects of the molecular weight (1000-8000 g/mol) and the weight ratios with PEG (30/100-70/100) of PET segments on the performance of synthetic copolymers were investigated. The chemi

APA, Harvard, Vancouver, ISO, and other styles

34

Groch, Paweł, Anna Bihun-Kisiel, Aleksandra Piontek, and Wioletta Ochędzan-Siodłak. "Structural and Thermal Properties of Ethylene-Norbornene Copolymers Obtained Using Vanadium Homogeneous and SIL Catalysts." Polymers 12, no. 11 (2020): 2433. http://dx.doi.org/10.3390/polym12112433.

Full text

Abstract:

The series of ethylene-norbornene (E-NB) copolymers was obtained using different vanadium homogeneous and supported ionic liquid (SIL) catalyst systems. The 13C and 1H NMR (carbon and proton nuclear magnetic resonance spectroscopy) together with differential scanning calorimetry (DSC) were applied to determine the composition of copolymers such as comonomer incorporation (CNB), monomer dispersity (MD), monomer reactivity ratio (re), sequence length of ethylene (le) and tetrad microblock distributions. The relation between the type of catalyst, reaction conditions and on the other hand, the cop

APA, Harvard, Vancouver, ISO, and other styles

35

Patel, Jayesh R., Dipan H. Sutaria, and Magan N. Patel. "Physicochemical study of complexation and ion-exchange properties of 2-hydroxy-4-ethoxypropiophenone—ethylene glycol polymer." High Performance Polymers 6, no. 2 (1994): 123–32. http://dx.doi.org/10.1177/095400839400600203.

Full text

Abstract:

Copolymers (HEPP-EG) were synthesized by the condensation of 2-hydroxy-4-ethoxypropiophenone with ethylene glycol in presence of polyphosphoric acid as a catalyst. The copolymers were characterized by elemental analyses, IR spectra, viscosity and thermal studies. The number-average molecular weight (Mn) was measured by non-aqueous conductometric titration. The copolymer HEPP-EG-6 was complexed with metal ions, Cu2+, Ni2+, Co2, Mn2+ and Zn2+ and characterized. Chelation ion-exchange properties have been studied by employing the batch equilibration method.

APA, Harvard, Vancouver, ISO, and other styles

36

Gong, Yongji, Weihua Song, Yifan Wu, et al. "Effect of chain segment length on crystallization behaviors of poly(l-lactide-b-ethylene glycol-b-l-lactide) triblock copolymer." Polymers and Polymer Composites 28, no. 2 (2019): 77–88. http://dx.doi.org/10.1177/0967391119863951.

Full text

Abstract:

The poly(l-lactide-b-ethylene glycol-b-l-lactide) (PLLA-PEG-PLLA) triblock copolymers with different chain segment length are fabricated by ring-opening polymerization. The structure, molecular weight, and crystallization behaviors of the triblock copolymers are characterized by Fourier transform infrared, nuclear magnetic resonance spectroscopy, gel permeation in chromatography, X-ray diffraction, differential scanning calorimetry, and polarizing optical microscopy (POM). The results show that the increase of block length is beneficial to improve its crystallization. In addition, the triblock

APA, Harvard, Vancouver, ISO, and other styles

37

Bui, Nhi Dinh, Ngo Dinh Vu, Thao Thi Minh, Huong Thi Thanh Dam, Regina Romanovna Spiridonova, and Semenovich Alexandr Sirotkin. "Effect of Acetate Group Content in Ethylene-Vinyl Acetate Copolymer on Properties of Composite Based on Low Density Polyethylene and Polyamide-6." International Journal of Polymer Science 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/3149815.

Full text

Abstract:

The effect of the content of vinyl acetate groups in ethylene-vinyl acetate copolymer on the properties of polymer composite based on low density polyethylene and polyamide-6 was studied. Ethylene-vinyl acetate copolymer containing less vinyl acetate groups (10–14 wt.%) has a positive compatibility effect on polymer composite than ethylene-vinyl acetate copolymer containing 21–30 wt.% vinyl acetate groups. The polymer composites of LDPE, PA-6, and EVA containing 10–14 wt.% vinyl acetate groups possess the ability of biodegradation. The physical-mechanical properties of sample and molecular mas

APA, Harvard, Vancouver, ISO, and other styles

38

Forys, Aleksander, Maria Chountoulesi, Barbara Mendrek, et al. "The Influence of Hydrophobic Blocks of PEO-Containing Copolymers on Glyceryl Monooleate Lyotropic Liquid Crystalline Nanoparticles for Drug Delivery." Polymers 13, no. 16 (2021): 2607. http://dx.doi.org/10.3390/polym13162607.

Full text

Abstract:

The investigation of properties of amphiphilic block copolymers as stabilizers for non-lamellar lyotropic liquid crystalline nanoparticles represents a fundamental issue for the formation, stability and upgraded functionality of these nanosystems. The aim of this work is to use amphiphilic block copolymers, not studied before, as stabilizers of glyceryl monooleate 1-(cis-9-octadecenoyl)-rac-glycerol (GMO) colloidal dispersions. Nanosystems were prepared with the use of poly(ethylene oxide)-b-poly(lactic acid) (PEO-b-PLA) and poly(ethylene oxide)-b-poly(5-methyl-5-ethyloxycarbonyl-1,3-dioxan-2-

APA, Harvard, Vancouver, ISO, and other styles

39

Bayramova, I. V. "RHEOLOGICAL PROPERTIES OF NANOCOMPOSITES BASED ON BIFUNCTIONAL CLINOPTILOLITE AND ETHYLENE/HEXENE COPOLYMER." Azerbaijan Chemical Journal, no. 2 (June 18, 2020): 83–89. http://dx.doi.org/10.32737/0005-2531-2020-2-83-89.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Vieira Marques, Maria de Fátima, Fernanda Constantino Rocha, and Narda Juárez Soto. "Copolymerization of Ethylene/Diene with Different Metallocene Catalysts." Zeitschrift für Naturforschung B 61, no. 11 (2006): 1426–32. http://dx.doi.org/10.1515/znb-2006-1117.

Full text

Abstract:

Copolymerizations of ethylene and 1,7-octadiene were carried out employing homogeneous catalysts Cp2ZrCl2, Ph2C(Flu,Cp)ZrCl2 and Et(Ind)2ZrCl2, and methylaluminoxane as cocatalyst. The polymerization characteristics, such as catalytic activity, polymerization rate, copolymer composition, and thermal properties were examined in relation to the catalyst type. Different comonomer concentrations were employed, and the reaction time was varied, ranging from 1 h up to 4 h, at 90°C and at 0.5 bar ethylene pressure. The results showed that the catalyst Cp2ZrCl2 was more efficient than Et(Ind)2ZrCl2 in

APA, Harvard, Vancouver, ISO, and other styles

41

Tai, Hong Yun, Craig L. Duvall, Patrick S. Stayton, Alan S. Hoffman, and Wen Xin Wang. "pH-Responsive Hyperbranched Copolymers from One-Pot RAFT Copolymerization of Propylacrylic Acid and Poly(ethylene glycol diacrylate)." Advances in Science and Technology 77 (September 2012): 333–42. http://dx.doi.org/10.4028/www.scientific.net/ast.77.333.

Full text

Abstract:

pH-Responsive polymers have attracted much attention for biotechnology applications as carriers or matrix to facilitate intracellular or extracellular therapeutic drug delivery and release. In this paper, we report the development of new pH-responsive and hyperbranched copolymers with potential for such applications. These pH-responsive hyperbranched copolymers were synthesized via one pot reversible addition-fragmentation chain transfer (RAFT) copolymerization of propylacrylic acid (PAA) and a branching co-monomer poly(ethylene glycol diacrylate) (PEGDA) (Mn=258 Da) at the monomer feed molar

APA, Harvard, Vancouver, ISO, and other styles

42

Tang, Xin De, Nian Feng Han, and De Jie Zhou. "Synthesis and Characterization of Novel Amphiphilic Fluorinated Triblock Copolymer." Advanced Materials Research 87-88 (December 2009): 36–40. http://dx.doi.org/10.4028/www.scientific.net/amr.87-88.36.

Full text

Abstract:

Atom transfer radical polymerization (ATRP) has been employed for the synthesis of a novel amphiphilic fluorinated triblock copolymer PEG-b-PS-b-PFHEM for anti-fouling coatings. The macroinitiator based on poly(ethylene oxide) monomethyl ether was used to prepare an amphiphilic diblock copolymer PEG-b-PSt-Br, which was then utilized to initiate the ATRP of fluorinated monomer perfluorohexylethyl acrylate (FHEA), resulting in an amphiphilic triblock copolymer. These copolymers were characterized by means of 1H NMR and GPC. The amphiphilic triblock copolymer surface composes of fluorinated and P

APA, Harvard, Vancouver, ISO, and other styles

43

Brewer, Kyle, Batjargal Gundsambuu, Paula Facal Marina, Simon C. Barry та Anton Blencowe. "Thermoresponsive Poly(ε-Caprolactone)-Poly(Ethylene/Propylene Glycol) Copolymers as Injectable Hydrogels for Cell Therapies". Polymers 12, № 2 (2020): 367. http://dx.doi.org/10.3390/polym12020367.

Full text

Abstract:

Injectable, thermoresponsive hydrogels are promising candidates for the delivery, maintenance and controlled release of adoptive cell therapies. Therefore, there is significant interest in the development of cytocompatible and biodegradable thermoresponsive hydrogels with appropriate gelling characteristics. Towards this end, a series of thermoresponsive copolymers consisting of poly(caprolactone) (PCL), poly(ethylene glycol) (PEG) and poly(propylene glycol) (PPG) segments, with various PEG:PPG ratios, were synthesised via ring-opening polymerisation (ROP) of ε-caprolactone and epoxy-functiona

APA, Harvard, Vancouver, ISO, and other styles

44

Bakather, Omer Yahya, and Mamdouh A. Al-Harthi. "Effect of titanium nanofiller on the productivity and crystallinity of ethylene and propylene copolymer." Journal of Polymer Engineering 34, no. 9 (2014): 829–37. http://dx.doi.org/10.1515/polyeng-2014-0044.

Full text

Abstract:

Abstract Bis(cyclopentadienyl) zirconium (IV) dichloride of empirical formula C10 H10 Cl2 Zr was used as a catalyst. Doped titania with iron (TiO2/Fe) nanofillers were used to study the effect of nanofillers on ethylene homopolymer and ethylene/propylene copolymer properties. Using titanium dioxide doped with iron (TiO2/Fe) resulted in the increase in the molecular weight (Mw) of polyethylene and ethylene/propylene copolymer nanocomposites of up to 80% when compared to the neat polymer. The catalyst activity was increased by using TiO2/Fe nanofiller for both ethylene polymerization and ethylen

APA, Harvard, Vancouver, ISO, and other styles

45

Toprakci, Ozan, Mukaddes Sevval Cetin, and Hatice Aylin Karahan Toprakci. "Production of Styrene-[Ethylene-(Ethylene-Propylene)]-Styrene Block Copolymer (SEEPS) Microfibers by Electrospinning." Material Science Research India 18, no. 1 (2021): 27–36. http://dx.doi.org/10.13005/msri/180104.

Full text

Abstract:

Thermoplastic elastomer-based fibers have many advantages including lightness, flexibility, resilience. Styrene-[ethylene-(ethylene-propylene)]-styrene (SEEPS) is a styrenic block copolymer based thermoplastic elastomer and it can be used for many applications with many functions as a matrix, compatibilizer, modifier or adhesive. It has good resistance to oxidizing agents, weathering, aging, and it can be used under various conditions. In this study, SEEPS block copolymer fibers were electrospun. This study is the first study about the electrospinning of SEEPS block copolymer in the literature

APA, Harvard, Vancouver, ISO, and other styles

46

SHEN, Jiabin, Ming WANG, Jiang LI, et al. "STUDY ON THE MECHANICAL PROPERTIES OF PROPYLENE-ETHYLENE COPOLYMER/ETHYLENE-1-OCTENE COPOLYMER STRATIFIED COMPOSITES." Acta Polymerica Sinica 007, no. 9 (2009): 827–32. http://dx.doi.org/10.3724/sp.j.1105.2007.00827.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Chiu, H. T., Y. G. Shiau, W. M. Chiu, and S. S. Syau. "Toughening isotactic polypropylene and propylene-ethylene block copolymer with styrene-ethylene butylene-styrene triblock copolymer." Journal of Polymer Research 2, no. 1 (1995): 21–29. http://dx.doi.org/10.1007/bf01493430.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Chen, Xiao Nong, Zai Qian Qi, Ya Qin Huang, Robert Pelton, and Raja Ghosh. "Surfaces Modified by Amphiphilic Copolymer: Preparation and Application." Advanced Materials Research 47-50 (June 2008): 1311–14. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.1311.

Full text

Abstract:

N-isopropylacrylamide (NIPAM)-ethylene oxide (EO) copolymer was grafted on filter paper surface to obtain paper-based adsorptive membrane. Protein adsorption on and release from the membrane was evaluated under various conditions using humanized monoclonal antibody as model protein. The results obtained indicated that amphiphilic copolymer modified filter paper could be used as a novel chromatographic membrane for protein separation/purification. Comb-block copolymers of NIPAM with N-vinylpyrrolidone (VP) were prepared through RAFT polymerization and macromonomer techniques. Surface modificati

APA, Harvard, Vancouver, ISO, and other styles

49

Morgan, Michael Kerin, Andrew Stewart Davidson, Stavros Koustais, Mary Simons, and Elizabeth Anne Ritson. "The failure of preoperative ethylene-vinyl alcohol copolymer embolization to improve outcomes in arteriovenous malformation management: case series." Journal of Neurosurgery 118, no. 5 (2013): 969–77. http://dx.doi.org/10.3171/2012.11.jns112064.

Full text

Abstract:

Object Ethylene-vinyl alcohol copolymer embolization is increasingly used preoperatively in the resection of brain arteriovenous malformations (AVMs). However, the case for embolization improving the outcome of resection has not been evaluated. In this paper the authors set out to compare outcomes after surgery for brain AVMs in 2 consecutive periods of practice. In the first period, selective embolization was used without the use of ethylene-vinyl alcohol copolymer. In the second period, selective embolization with ethylene-vinyl alcohol copolymer was performed. Methods A consecutive case ser

APA, Harvard, Vancouver, ISO, and other styles

50

Niamsa, N., M. Srisa-ard, Y. Srisuwan, et al. "Preparation and Drug Release Studies of Chitosan/Methoxy Poly(Ethylene Glycol)-b-Poly(D,L-Lactide-co-Glycolide) Nanocomposite Films for Use as Controlled Release Drug Delivery." Advanced Materials Research 55-57 (August 2008): 717–20. http://dx.doi.org/10.4028/www.scientific.net/amr.55-57.717.

Full text

Abstract:

Nanocomposite chitosan-based films incorporated with drug-loaded methoxy poly(ethylene glycol)-b-poly(D,L-lactide-co-glycolide) diblock copolymers (MPEG-b-PDLLG) nanoparticles were prepared by forming drug-loaded nanoparticles in chitosan solution before suspension-solution film casting. Salicylic acid was used as a poorly-water soluble model drug. The nanocomposite films with DLL/G ratios of 100/0 and 85/15 mol% and chitosan/diblock copolymer/drug ratios of 80/1/1, 80/2/2 and 80/4/4 (w/w) were prepared and investigated. The sizes of drug-loaded nanoparticles into the chitosan films were appro

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!