Hygrothermal ageing of pultruded GFRP profiles: Comparative study of unsaturated polyester and vinyl ester resin matrices

2021 ◽  
Vol 140 ◽  
pp. 106193
Author(s):  
J.M. Sousa ◽  
M. Garrido ◽  
J.R. Correia ◽  
S. Cabral-Fonseca
Keyword(s):  
Comparative Study ◽  
Vinyl Ester ◽  
Unsaturated Polyester ◽  
Vinyl Ester Resin ◽  
Hygrothermal Ageing

Study on the Resin Curing Time and the Mechanical Properties of the Composites

2012 ◽  
Vol 602-604 ◽  
pp. 33-36
Author(s):  
Jia Ying Sun ◽  
Yan Qing Li ◽  
Wei Tian ◽  
Cheng Yan Zhu
Keyword(s):  
Bisphenol A ◽  
Vinyl Ester ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Experimental Temperature ◽  
Curing Agent ◽  
Curing Time ◽  
Vinyl Ester Resin ◽  
Resin Curing

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.

scholarly journals Bio-sourced vinyl ester resin reinforced with microfibrillar cellulose: Mechanical and thermal properties

2021 ◽  
pp. 096739112110020
Author(s):  
Eric Desnoes ◽  
Lotfi Toubal ◽  
Dominic Thibeault ◽  
Amel Hadj Bouazza ◽  
Daniel Montplaisir
Keyword(s):  
Tensile Strength ◽  
Vinyl Ester ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Mechanical And Thermal Properties ◽  
Vinyl Ester Resin ◽  
Hydrophobic Behavior ◽  
Glass Fiber Reinforced ◽  
Microfibrillar Cellulose ◽  
Mixture Homogeneity

New thermoset composite material made from cardanol-based resin blended with microfibrillar cellulose was compared to petroleum-based vinyl ester and glass-fiber-reinforced unsaturated polyester in terms of mechanical, thermal, rheological and surface properties of produced polymers and composites. The bio-sourced material was less resistant than the commercial vinyl ester but comparable to the unsaturated polyester resin. Microfibrillar cellulose increased the tensile strength and modulus but increased the resin viscosity and decreased the mixture homogeneity. The bio-sourced and commercial resins displayed similar hydrophobic behavior, and cellulose slightly decreased composite hydrophobicity. The glass transition temperature of the bio-sourced material was comparable to that of the unsaturated polyester. Thermal decompositions of composites and thermoset polymers were also similar. Cellulose and cardanol thus may be adequate as sustainable components in the composite materials industry.

Effect of Chemical Treatment on Mechanical Properties and Moisture Regain of Jute Fibers

1988 ◽  
Vol 58 (9) ◽  
pp. 537-543 ◽  
Author(s):  
I. K. Varma ◽  
S. R. Anantha Krishnan ◽  
S. Krishnamoorthy
Keyword(s):  
Mechanical Properties ◽  
Vinyl Ester ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Corchorus Olitorius ◽  
Vinyl Ester Resin ◽  
Moisture Regain ◽  
Corchorus Capsularis ◽  
Jute Fibers ◽  
Trimethoxy Silane

We report on the moisture regain, relative vapor pressure, hysteresis, and mechanical properties of two varieties of jute fibers. Corchorus capsularis grade 2 and Corchorus olitorius grade 2, modified by treatment with sebacoyl chloride, tolylene diisocyanate unsaturated polyester resin, vinyl ester resin, γ-aminopropyl trimethoxy silane, and isopropyl triisostearoyl titanate. All the treated fibers showed a reduction in moisture regain, but some fibers had superior moisture repellent behavior with no deterioration in their mechanical properties, while others suffered a loss in mechanical properties.

scholarly journals Property Analysis of Carbon Fiber with Vinyl Ester Resin Type Sizing Agen

2013 ◽  
Vol 25 (14) ◽  
pp. 7955-7958 ◽  
Author(s):  
Wanwan Ding ◽  
Juan Chen ◽  
Jianye Liu ◽  
Zengkai Pang ◽  
Ruifang Guan
Keyword(s):  
Carbon Fiber ◽  
Vinyl Ester ◽  
Vinyl Ester Resin ◽  
Property Analysis

Cure and Dynamic-Mechanical Behaviors of Vinyl Ester Resinfilled with Multi-Walled Carbon Nanotubes

2010 ◽  
Vol 150-151 ◽  
pp. 1413-1416 ◽  
Author(s):  
Hong Yan Chen ◽  
Zhen Xing Kong ◽  
Ji Hui Wang
Keyword(s):  
Carbon Nanotubes ◽  
Vinyl Ester ◽  
Mechanical Response ◽  
Cure Kinetics ◽  
Crosslinking Density ◽  
Vinyl Ester Resin ◽  
Scanning Calorimetry ◽  
Dynamic Mechanical ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The cure kinetics of Derakane 411-350, a kind of vinyl ester resin, and its suspensions containing multi-walled carbon nanotubes( MWCNTs) were investigated via non-isothermal dynamic scanning calorimetry (DSC) measurements. The results showed that incorporation of MWCNTs into vinyl ester resin excessively reduces polymerization degree and crosslinking density of vinyl ester resin. For suppressing the negative effect caused by nanotubes, the higher temperature initiator combined with the initiator MEKP was used. Dynamic-mechanical Behavior testing was then carried out on the cured sample in order to relate the curing behavior of MWCNTs modified resin suspensions to mechanical response of their resulting nanocomposites. It was revealed that nanocomposites containing MWCNTs possessed larger storage modulus values as well as higher glass transition temperatures (Tg) as compared to those without MWCNTs after using mixed intiators system to improve the degree of cure.

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