Academic literature on the topic 'Vinyl ester resins – Thermomechanical properties'

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Journal articles on the topic "Vinyl ester resins – Thermomechanical properties"

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Karami, Z., MJ Zohuriaan-Mehr, K. Kabiri, and N. Ghasemi Rad. "Bio-based thermoset alloys from epoxy acrylate, sesame oil- and castor oil-derived resins: Renewable alternatives to vinyl ester and unsaturated polyester resins." Polymers from Renewable Resources 10, no. 1-3 (February 2019): 27–44. http://dx.doi.org/10.1177/2041247919863633.

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This study deals with the synthesis of vegetable oil (VO)-derived formulated resins with high bio-based content (30–77%) as potential renewable alternatives to conventional fossil-based vinyl ester (VE) and unsaturated polyester (UP) resins. First, epoxy acrylate was synthesized from a commercial epoxy resin via acrylation with acrylic acid. Then, acrylated epoxidized sesame oil (AESSO) and maleated castor oil (MCO) were synthesized and spectrally characterized. Afterward, networks of VE, AESSO, and MCO or their binary blends were prepared. The curing trend of the resins was investigated by differential scanning calorimetry. According to thermal and thermomechanical analysis, all of the VO-based networks possessed slightly inferior properties compared to those of VE. However, the adhesion strength of the VO-based alloying systems was higher than that of their petroleum-based counterpart based on T-peel and lap shear tests. Overall, it was concluded that the bio-resourced alloys could be considered as good alternatives to VE and UP resins, and the novel bio-resin formulations may be designed for adhesives, the polymer–matrix composites, and surface coating applications.
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Zhang, Xi, Vahid Bitaraf, Suying Wei, Zhanhu Guo, Xi Zhang, Suying Wei, and Henry A. Colorado. "Vinyl ester resin: Rheological behaviors, curing kinetics, thermomechanical, and tensile properties." AIChE Journal 60, no. 1 (November 18, 2013): 266–74. http://dx.doi.org/10.1002/aic.14277.

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Salleh, Z., M. M. Islam, J. A. Epaarachchi, and M. T. I. Khan. "Thermo-mechanical properties of fused borosilicate syntactic foams." Journal of Mechanical Engineering and Sciences 13, no. 2 (June 28, 2019): 4898–910. http://dx.doi.org/10.15282/jmes.13.2.2019.10.0407.

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The coefficient thermal expansion, a (CTE) of glass microballoon/vinyl ester syntactic foam was determined using dimensional changes of a temperature gradient plot. The CTE was measured and found to be up to 53-63 % lower than the vinyl ester resin matrix when mixing with different weight percentages of the glass microballoon ranging from 2 wt.% to 10 wt.% using a thermomechanical analyzer (TMA). The results of CTE showed that it has a strong relationship with the syntactic foam density (r), radius ration (h) ,cavity porosity (fg) and matrix porosity (fm). Experimental results showed that the CTE decreases when glass microballoons are added into the composites measured at different temperatures ranging from 30 oC to 70 °C. The CTE from the experimental results were also compared with Turner’s modification model for composites for its suitability for thermal expansion of syntactic foams. The results indicate that Turner’s modification model exhibits a close correlation with the reduction up to 80 % of CTE based on experiment.
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Salleh, Zulzamri, Md Mainul Islam, and Jayantha Ananda Epaarachchi. "Thermal Expansion Properties of Fused Borosilicate Syntactic Foams." Nano Hybrids and Composites 23 (December 2018): 39–45. http://dx.doi.org/10.4028/www.scientific.net/nhc.23.39.

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The thermal properties such the coefficient thermal expansion, α (CTE) of fused borosilicate syntactic foam was determined using dimensional changes of a temperature gradient plot. The CTE was measured and found to be achieved the value lower than the vinyl ester resin matrix when mixing with different weight percentages of the glass microballoon ranging from 2 wt.% to 10 wt.% using a thermomechanical analyzer (TMA). These results showed that it has a strong relationship with the syntactic foam physical properties such density, radius ration,cavity porosity and matrix porosity. Experimental results showed that the CTE decreases when glass microballoons are added into the composites measured at different temperatures ranging from 30 °C to 70 °C. The CTE from the experimental results were also analysed using Turner’s modification model for composites for its suitability for thermal expansion of syntactic foams.
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Ramraji, K., K. Rajkumar, and P. Sabarinathan. "Tailoring of tensile and dynamic thermomechanical properties of interleaved chemical-treated fine almond shell particulate flax fiber stacked vinyl ester polymeric composites." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 11 (May 9, 2019): 2311–22. http://dx.doi.org/10.1177/1464420719849616.

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Natural fiber and particulates are being exploited to attain eco-friendly products for construction and automotive sectors. These sectors are moving towards the use of high damping characteristic natural biofibers and particulate-reinforced polymer composite as part of the structural components. In this work, woven flax fiber (0° and 90°) and almond shell particulates were used. They were subsequently treated with alkaline and acetylene chemical solution separately. Polymer composite laminates were prepared using a vinyl ester resin as matrix and by stacking flax fibers and almond particulates interleaved in an alternative sequence using the hand layup technique. This was followed by hydraulic pressing. Composite laminates were fabricated by varying the almond shell particulate weight fraction of 0%, 5%, 10%, and 15%. Mechanical properties such as tensile and flexural strength were experimentally measured. Dynamic thermomechanical analysis was conducted on the alkaline-treated and untreated composites with different frequencies for the assessment of the damping characteristics. The alkaline-treated interleaved almond shell and flax fiber composite showed considerably higher damping characteristics. This could be due to the improved adhesion between the matrix and reinforcements. An addition of almond shell particulate positively increased the strength and stiffness of composites.
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Yin, Xiaoli, Yancong Liu, Yufei Miao, and Guijun Xian. "Water Absorption, Hydrothermal Expansion, and Thermomechanical Properties of a Vinylester Resin for Fiber-Reinforced Polymer Composites Subjected to Water or Alkaline Solution Immersion." Polymers 11, no. 3 (March 16, 2019): 505. http://dx.doi.org/10.3390/polym11030505.

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In the present paper, a vinyl ester (VE) resin, potentially used as a resin matrix for fiber-reinforced polymer (FRP) composite sucker rods in oil drilling, FRP bridge cables, or FRP marine structures, was investigated on its resistance to water and alkaline solution immersion in terms of water uptake, hydrothermal expansion, and mechanical properties. A two-stage diffusion model was applied to simulate the water uptake processes. Alkaline solution immersion led to a slightly higher mass loss (approx. 0.4%) compared to water immersion (approx. 0.23%) due to the hydrolysis and leaching of uncured small molecules (e.g., styrene). Water immersion caused the expansion of VE plates monitored with Fiber Bragg Grating (FBG). With the same water uptake, the expansion increased with immersion temperatures, which is attributed to the increased relaxation extent of the resin molecular networks. Although an obvious decrease of the glass transition temperatures (Tg) of VE due to water immersion (5.4 to 6.1 °C/1% water uptake), Tg can be recovered almost completely after drying. Tensile test results indicate that a short-term immersion (less than 6 months) enhances both the strength and elongation at break, while the extension of the immersion time degrades both the strength and elongation. The modulus of VE shows insensitive to the immersion even at elevated temperatures.
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Tkachuk, A. I., I. V. Terekhov, Ya M. Gurevich, and K. N. Grigoreva. "RESEARCH OF THE INFLUENCE OF THE MODIFYING ADDITIVES NATURE ON THE RHEOLOGICAL AND THERMOMECHANICAL PROPERTIES OF A PHOTOPOLYMER COMPOSITION BASED ON EPOXY VINYL ESTER RESIN." «Aviation Materials and Technologies», no. 3 (2019): 31–40. http://dx.doi.org/10.18577/2071-9140-2019-0-3-31-40.

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Sun, Jia Ying, Yan Qing Li, Wei Tian, and Cheng Yan Zhu. "Study on the Resin Curing Time and the Mechanical Properties of the Composites." Advanced Materials Research 602-604 (December 2012): 33–36. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.33.

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In order to study the curing characteristics of common resins including bisphenol-A epoxy vinyl ester resin, phenolic epoxy vinyl ester resin and unsaturated polyester resin, the curing time of three resins was tested using cobalt naphthenate as accelerator and methyl ethyl ketone peroxide as curing agent. The results showed that the resin curing time reduces with the experimental temperature rising; in order to control the curing time at about 25 minutes when the experimental temperature is 23°C, the curing agent adding proportion of bisphenol-A epoxy vinyl ester resin, unsaturated polyester resin and phenolic epoxy vinyl ester resin are respective about 0.7%, 0.5% and 1.8%. The composites made by bisphenol-A epoxy vinyl ester resin have excellent tensile strength and composites made by phenolic epoxy vinyl ester resin have best bending strength.
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Siva, P., I. K. Varma, D. M. Patel, and T. J. M. Sinha. "Effect of structure on properties of vinyl ester resins." Bulletin of Materials Science 17, no. 6 (November 1994): 1095–101. http://dx.doi.org/10.1007/bf02757587.

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Cook, Wayne D., George P. Simon, Peter J. Burchill, Michelle Lau, and Travis J. Fitch. "Curing kinetics and thermal properties of vinyl ester resins." Journal of Applied Polymer Science 64, no. 4 (April 25, 1997): 769–81. http://dx.doi.org/10.1002/(sici)1097-4628(19970425)64:4<769::aid-app16>3.0.co;2-p.

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Dissertations / Theses on the topic "Vinyl ester resins – Thermomechanical properties"

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Li, Hui III. "Synthesis, Characterization and Properties of Vinyl Ester Matrix Resins." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30521.

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Vinyl ester oligomers diluted with styrene are important matrix resins for thermosetting polymer composites. A major objective of this work has been to study the chemistry and kinetics of the cure reactions of vinyl ester resins at elevated curing temperatures, which are consistent with typical composite processing conditions. The crosslinking reaction of vinyl ester resins was studied by FTIR and the loss of the carbon-carbon double bonds of the methacrylate (943 cm-1) and styrene (910 cm-1) were followed independently. A small background absorbance overlapping the absorbance at 943 cm-1 was subtracted from all spectra collected as a function of reaction time to quantify conversions. Copolymerization reactivity ratios of styrene and terminal methacrylates on vinyl ester oligomers were calculated to be rs = 0.36 ± 0.05 and rm = 0.24 ± 0.1 from early conversion data obtained at 140°C on a series of resins with systematically increasing levels of styrene. The composition data were analyzed using the integrated form of the copolymerization equation and assuming a terminal reactivity model to predict copolymer compositions throughout the reactions. These curves agreed well with the experimental data even at high conversion levels. Another important part of this research was to study structure-property relationships of vinyl ester resins. Characteristics of vinyl ester resins and networks such as shrinkage, viscosity, crosslink density, glass transition temperature, gel swelling, and toughness have been studied. The shrinkage of vinyl ester resins during cure was calculated according to density measurements to be 4% - 10% depending on styrene content. It was found that the chain length of vinyl ester oligomers strongly affects the properties of the networks. For vinyl ester resins with longer lengths (Mn = 1000 g/mol), crosslinked networks have higher fracture toughness values and lower Tg's. Finally, the synthesis, cure reactions and toughness of a new low viscosity vinyl ester resin were also investigated in this work. The new oligomer has a structure with which the hydroxyl groups on the backbone are replaced by methyl groups. They could be processed without a diluent. The cure reactions of the new resin were studied by FTIR, DSC and 13C-NMR.
Ph. D.
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Burts, Ellen. "Structure and Properties Of dimethacrylate-Styrene Resins and Networks." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29507.

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One of the major classes of polymer matrix resins under consideration for structural composite applications in the infrastructure and construction industries is the dimethacrylate matrix resin. An investigation of the relationships between the chemical structures and properties of these dimethacrylate/styrene networks has been conducted. Oligomer number average molecular weights of the polyhydroxyether ranging from 700 to 1200g/mole were studied with systematically varied styrene concentrations to assess the effects of crosslink density and chemical composition on glass transition temperatures, toughness, tensile properties and matrix strain. Network densities have been estimated from measurements of the rubbery moduli at Tg + 40°C. Within this rather small range in vinyl ester molecular weight, toughness of the resultant networks improved tremendously as the vinyl ester oligomer Mn was increased from 700g/mole to 1200g/mole due to improvements in the resistance to crack propagation. As styrene concentration was increased along all series' of materials, brittleness increased even though the molecular weight between crosslinks increased. This was attributed to the inherent relative brittleness of the polystyrene chemical structure relative to the polyhydroxyether component. This may also be related to the reactivity ratios dictating styrene and vinyl ester sequence length and warrants further investigation. As expected, the volume contraction upon cure also decreased significantly as styrene was decreased, and thus residual cure stresses may be reduced in fiber-reinforced composites. Vickers microhardness values decreased for each of the series when molecular weight increased and styrene content decreased. Two different cure procedures were compared to assess the effects of conversion on the physical and mechanical properties. All mechanical properties investigated (i.e. fracture toughness, tensile strength, and microhardness) were dependent on the cure procedure. Materials cured at 140°C were harder, more brittle, had lower elongations and higher rubbery moduli than those cured at 25°C followed by a 93°C postcure. A maximum in the degree of conversion occurred with increasing polymerization temperature and can be explained by the competition between the chemical reaction and molecular mobility. The overall shrinkage per moles of vinyl groups converted was the same when the materials were cured at 25°C or 140°C. However, in the room temperature cured samples, there was essentially no further densification of the network during postcure, regardless of the postcure temperature. A mono-methacrylate analogue of the dimethacrylate terminated poly(hydroxyether) oligomer was synthesized and copolymerized with styrene to study the effects of chain transfer during elevated temperature reactions.
Ph. D.
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Peta, Neo Phyllis. "The effect of acrylated epoxidised soyabean oil on the curing and (THERMO) mechanical properties of vinyl ester resins." 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001350.

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M. Tech. Polymer Technoliogy.
Studies the basic curing, rheological and thermomechanical behaviours of hybrids composed of a VE resin and acrylated epoxidised soyabean oil (AESO). The hybrid systems were cured by free radical initiated radical copolymerisation with styrene. The prospective outcomes were: To find suitable initiators/accelerators for the VE/AESO hybrids which work within the entire composition range? To contribute to the selection of VE resins for AESO modification To establish the optimal quantity of AESO required obtaining the best cure characteristics, the most acceptable reduction in Tg, and stiffness as compared with the parent VE resin.
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Mathole, Alinah Phindiwe. "The effect of epoxidised soybean oil on the curing and (THERMO) mechanical properties of epoxy resins." 2012. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001351.

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M. Tech. Polymer Technology.
Studies the effects of incorporating epoxidised soybean oil (ESO) in a standard bisphenol A-type epoxy resin (EP) cured by both amine and anhydride hardeners. The EP/ESO ratio was set for 100/0, 75/25, 50/50, 25/75 and 0/100 (wt./wt.). The investigations performed covered the curing, rheology (gelling), and thermomechanical analysis and thermogravimetric analysis of the sample produced.
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Tassia, Yuliana, and 許麗琪. "Effects of silane-grafted silica nanoparticles and montmorillonite clay on the volume shrinkage, internal pigmentability, mechanical properties and cured sample morphology for unsaturated polyester, vinyl ester, and epoxy resins." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/75680818314138415635.

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碩士
國立臺灣科技大學
化學工程系
101
The synthesis of silane-grafted silica nanoparticles with different size (d = 15 and 30 nm) and montmorillonite clay (MMT) with the subsequent characterization of the grafting efficiency, grafting density, as well as the surface silanol groups conversion have been carried out. The silane coupling agents used for the treatment are γ-methacryloxy propyl trimethoxy silane (MPS) and γ-glycidyloxy propyl trimethoxy silane (GPS). The effects of those silane-modified silica nanoparticles and MMT on the volume shrinkage characteristics, internal pigmentability, mechanical properties, and cured sample morphology for styrene (St)/unsaturated polyester (or vinyl ester)/additive ternary systems have been carried out. The number of silane coupling agents grafted on the MMT or silica surface and their silanol groups conversion were characterized by Fourier Transform Infrared Spectroscopy (FTIR). The cured sample morphology was observed by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). The volume shrinkage of the cured sample was measured by density method. Mechanical properties of the St/VER(n=2)/MPS-grafted silica (d = 30 nm) was investigated by using the universal testing machine and impact tester. The addition of silane-grafted MMT or silica nanoparticles reveals different results in the reduction of volume shrinkage for different UP or VER, each with different molecular weight, which is due to the incompatibility of the ternary system. Higher viscosity of the resin matrix, the characteristics of the silane-grafted MMT or silica nanoparticles, and the interfacial adhesion determine the sufficient incompatibility between the additive and the resin matrices. Therefore, an acceptable volume shrinkage and even a volume expansion could be achieved.
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Chang, Ting-Feng, and 張庭豐. "Synthesis of polymer-grafted graphene oxide and thermally reduced graphene oxide by RAFT free radical solution polymerizations, and their effects on volume shrinkage, mechanical properties, and thermal and electrical conductivities for vinyl ester resins." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7nkqee.

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碩士
國立臺灣科技大學
化學工程系
107
Synthesis of polymer grafted graphene oxide with core-shell structure (CSS) as low-profile additives (LPA) and tougheners for thermoset resins, and their effects on the cured sample morphology, volume shrinkage characteristics and mechanical properties and thermal and electrical conductivities for low-shrink vinyl ester resins (VER) during the cure were investigated. These CSS designated as TRGO-polymer, which contained thermal reduced graphene oxide(TRGO) as the core and organic polymer as the shell, were synthesized by the Z supported reversible addition-fragmentation chain transfer (RAFT) graft polymerization using S-Benzyl S'-trimethoxysilyl propyl trithio-carbonate (BTPT) as the coupable RAFT chain transfer agent (CTA). The graphene oxide (GO) was synthesized from natural graphite powder by a modified Hummers method. Thermal reduced graphene oxide (TRGO) was obtained by placing the graphene oxide in a high temperature furnace at 1050 ° C by a thermal reduction method.The grafted polymer as the shell structure of the TRGO-polymer was made from copolymer of MA and glycidyl methacrylate (poly(MA-co-GMA)), and poly(butylacrylate)-block- poly(methylacrylate-co-glycidyl methacrylate) (PBA-block-poly(MA-co-GMA)). Structure characterizations of BTPT, GO, TRGO,and TRGO-polymer have been performed by using FTIR, 1H-NMR, 13C-NMR, GPC, TGA and XRD. In this work, the effects of TRGO-polymer on the volume shrinkage characteristics and mechanical properties and thermal and electrical conductivities of the styrene(St)/ vinyl ester(VER)/ TRGO-polymer ternary systems during the cure have also been explored.
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Lin, Yu-Cheng, and 林禹丞. "Synthesis of silane-grafted graphene oxide (sg-GO) and silane-grafted thermally reduced graphene oxide (sg-TRGO), and their effects on cured sample morphologies, volume shrinkage, mechanical properties, and thermal and electrical conductivities for vinyl ester resins." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/uzdeu9.

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碩士
國立臺灣科技大學
化學工程系
107
The effects of graphene oxide (GO), silane-grafted graphene oxide (sg-GO), thermally reduced graphene oxide (TRGO), and silane-grafted thermally reduced graphene oxide (sg-TRGO) as special addictives on the cured sample morphologies, volume shrinkage characteristics and mechanical properties for low-shrink vinyl ester resins (VER) cured at 120℃ were investigated. The TRGO was produced by placing the GO in a high-temperature furnace kept at 1050 ℃ for 30 s, which was synthesized from natural graphite powder with average particle size of 75 μm by a modified Hummers method. The sg-GO was synthesized by using the silane coupling agent bearing C=C bonds, namely, γ-methacryloxy propyl trimethoxy silane (MPS), as a surface modifier for the surface treatment of GO at 100℃ for 3 hr with different times of reaction for surface treatment between GO and MPS (n=1 or 3), and with a fixed weight ratio of GO/MPS/solvent at 1:5:94. The grafting density of MPS on the GO or TRGO has been measured by FTIR. Finally, the effects of additives synthesized, such as, GO, sg-GO, TRGO, and sg-TRGO, on the volume shrinkage, mechanical properties, thermal and electrical conductivities for the styrene(St)/vinyl ester resin(VER)/additive ternary systems after the cure have also been investigated.
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Liao, Yi-cheng, and 廖翊成. "Synthesis of silane-grafted graphene oxide (sg-GO) and silane-grafted thermally reduced graphene oxide (sg-TRGO), and their effects on the volume shrinkage, mechanical properties, cured sample morphology, and X-ray scattering characteristics for vinyl ester resins." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/4uteyv.

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碩士
國立臺灣科技大學
化學工程系
105
The effects of graphene oxide (GO), silane-grafted graphene oxide (sg-GO), thermally reduced graphene oxide (TRGO), and silane-grafted thermally reduced graphene oxide (sg-TRGO) as special addictive on the cured sample morphologies, volume shrinkage characteristics and mechanical properties for low-shrink vinyl ester resins (VER) cured at 120 oC were investigated. The TRGO was produced by placing the GO in a high-temperature furnace kept at 1050 oC for 30 s, which was synthesized from natural graphites with average particle size of 75 μm by a modified Hummers method. The sg-GO was synthesized by using the silane coupling agent bearing acrylic C=C bonds, namely, γ-methacryloxy propyl trimethoxy silane (MPS), as a surface modifier for the surface treatment of GO at 100oC for 3 hr with different times of reaction for surface treatment between GO and MPS (n=1 or 3), and with a fixed weight ratio of GO/MPS/solvent at 1:5:94. The grafting density of MPS on the GO or TRGO has been measured by FTIR. Finally, the effects of additives synthesized, such as, GO, sg-GO, TRGO, and sg-TRGO, on the volume shrinkage and mechanical properties for the styrene(St)/vinyl ester resin(VER)/additive ternary systems after the cure have also been investigated.
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Huang, Hsin-Yao, and 黃新堯. "Effects of nano-scale core-shell rubber additives, inorganic silica /organic polymer core-shell particle, and montmorillonite clay on the cure kinetics, glass transition temperatures, volume shrinkage, mechanical properties and cured sample morphology for unsaturated polyester, vinyl ester, and epoxy resins." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/s6k57x.

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碩士
國立臺灣科技大學
化學工程系
100
The effects of four additives, including (1) nano- scale core-shell rubber additive,(2) inorganic silica gel/organic polymer core-shell particle, (3) organic montmorillonite clay, on the cure kinetics, glass transition temperatures, cured sample morphology, volume shrinkage characteristics and mechanical properties of the Styrene(St)/ Unsaturated polyester (or Vinyl ester resin)/ additives ternary systems and Epoxy/curing agent /additive ternary systems after the cure have been investigated. The experimental results have been explained by integrated measurements combining phase characteristic of the St/VER/additive ternary system and Epoxy/curing agent /additive ternary systems before the cure, final cure conversion, glass transition temperature, SAXS and WAXS analysis, cured sample morphology and Mechanical properties. Also the scattering intensity of vinyl ester resin (VER) and unsaturated polyester (UP) with different structure in dilute styrene solution was measured by the method of small angle X-ray scattering (SAXS), and the radius of gyration of VER and the UP molecule can then be calculated by using the Guinier law. The reaction kinetics for the ST/UP(or VER)/additive ternary system during the cure was measured by differential scanning calorimetry(DSC) and Fourier transform infrared spectrometry (FTIR). Finally, based on the Takayanagi mechanical models, the glass transition temperature in each region of the cured samples for ST/UP(or VER)/additive ternary system has been measured by dynamic mechanical analysis (DMA).
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Liu, Yi-Shan, and 劉伊珊. "Effects of nano- and submicron-scale core-shell rubber, inorganic/organic hybrid core-shell particle, and montmorillonite clay on cure kinetics, glass transition temperatures, volume shrinkage, mechanical properties and cured sample morphology for unsaturated polyester, vinyl ester, and epoxy resins." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/46798222045048248037.

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碩士
國立臺灣科技大學
化學工程系
101
The effects of four additives, including (1) nano- scale core-shell rubber additive,(2) inorganic silica gel/organic polymer core-shell particle, (3) organic montmorillonite clay, on the cure kinetics, glass transition temperatures, cured sample morphology, volume shrinkage characteristics and mechanical properties of the Styrene(St)/ Unsaturated polyester (or Vinyl ester resin)/ additives ternary systems and Epoxy/curing agent /additive ternary systems after the cure have been investigated. The experimental results have been explained by integrated measurements combining phase characteristic of the St/VER/additive ternary system and Epoxy/curing agent /additive ternary systems before the cure, final cure conversion, glass transition temperature, SAXS and WAXS analysis, cured sample morphology and Mechanical properties. Also the scattering intensity of vinyl ester resin (VER) and unsaturated polyester (UP) with different structure in dilute styrene solution was measured by the method of small angle X-ray scattering (SAXS), and the radius of gyration of VER and the UP molecule can then be calculated by using the Guinier law. The reaction kinetics for the ST/UP(or VER)/additive ternary system during the cure was measured by differential scanning calorimetry(DSC) and Fourier transform infrared spectrometry (FTIR). Finally, based on the Takayanagi mechanical models, the glass transition temperature in each region of the cured samples for ST/UP(or VER)/additive ternary system has been measured by dynamic mechanical analysis (DMA).
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Conference papers on the topic "Vinyl ester resins – Thermomechanical properties"

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"The Influence of Reinforcing Layers and Varnish Coatings on the Smoke Properties of Laminates Based on Selected Vinyl Ester and Polyester Resins." In 10th Conference on Terotechnology. Materials Research Forum LLC, 2018. http://dx.doi.org/10.21741/9781945291814-37.

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Mohamed, M., R. R. Vuppalapati, S. Hawkins, K. Chandrashekhara, and T. Schuman. "Impact Characterization of Polyurethane Composites Manufactured Using Vacuum Assisted Resin Transfer Molding." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88267.

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Glass fiber reinforced composites are finding various applications due to their high specific stiffness/strength, and corrosion resistance. Vacuum assisted resin transfer molding (VARTM) is one of the commonly used low cost composite manufacturing processes. Polyurethane (PU) resin system has been observed to have better mechanical properties and higher impact strength when compared to conventional resin systems such as polyester and vinyl ester. Until recently, PU could not be used in composite manufacturing processes such as VARTM due to its low pot life. In the present work, a thermoset PU resin systems with longer pot life developed by Bayer MaterialScience is used. Glass fiber reinforced PU composites have been manufactured using one part PU resin system. Performance evaluation was conducted on these composites using tensile, flexure and impact tests. Finite element simulation was conducted to validate the mechanical tests. Results showed that PU composites manufactured using novel thermoset PU resins and VARTM process will have significant applications in infrastructure and automotive industries.
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