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.

scholarly journals DSC Cure Kinetics of an Unsaturated Polyester Resin Using Empirical Kinetic Model

2015 ◽  
Vol 58 (2) ◽  
pp. 99-105
Author(s):  
Iram Abdullah
Keyword(s):  
Kinetic Analysis ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Crosslinking Reaction ◽  
Curing Time ◽  
Isothermal Test ◽  
Isothermal Kinetic Analysis ◽  
Isothermal Kinetic ◽  
Kinetics Of

In this paper, the kinetics of curing of unsaturated polyester resin initiated with benzoyl peroxide was studied. In case of unsaturated polyester (UP) resin, isothermal test alone could not predict correctly the curing time of UP resin. Therefore, isothermal kinetic analysis through isoconventional adjustment was used to correctly predict the curing time and temperature of UP resin. Isothermal kinetic analysis through isoconversional adjustment indicated that 97% of UP resin cures in 33 min at 120 °C. Curing of UP resin through microwaves was also studied and found that 67% of UP resin cures in 1 min at 120 °C. The crosslinking reaction of UP resin is so fast at 120 °C that it becomes impossible to predict correctly the curing time of UP resin using isothermal test and the burial of C=C bonds in microgels makes it impossible to be fully cured by microwaves at 120 °C. The rheological behaviour of unsaturated polyester resin was also studied to observe the change in viscosity with respect to time and temperature. 

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.

Study on thermal degradation and combustion behavior of flame retardant unsaturated polyester resin modified with a reactive phosphorus containing monomer

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49633-49642 ◽  
Author(s):  
Ying Lin ◽  
Bin Yu ◽  
Xin Jin ◽  
Lei Song ◽  
Yuan Hu
Keyword(s):  
Thermal Degradation ◽  
Flame Retardant ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Bulk Polymerization ◽  
Unsaturated Polyester Resin ◽  
Curing Agent ◽  
Phosphorus Containing ◽  
Reactive Phosphorus ◽  
Halogen Free

A halogen-free phosphorus-containing monomer (TAOPO) was successfully synthesized and used as a co-curing agent to prepare intrinsic flame-retardant unsaturated polyester resin (FR-UPR) by radical bulk polymerization with different TAOPO content.

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