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Bulletin of Materials Science

, Volume 17, Issue 6, pp 1095–1101 | Cite as

Effect of structure on properties of vinyl ester resins

  • P Siva
  • I K Varma
  • D M Patel
  • T J M Sinha
Article

Abstract

The paper describes the synthesis of vinyl ester resins based on diglycidyl ether of bisphenol-A (epoxy equivalent = 450–465 g/eq) (VR resin) and tetrabromobisphenol-A (epoxy equivalent = 380–420 g/eq) (VR-1 resin). The viscosity of styrenated VR resin was higher than VR-1 resin. The effect of styrene andα-methyl styrene on curing of VR resins was studied. An increase in styrene from 30 to 50 wt% resulted in an increase in gel time and a decrease in exothermic peak. Addition ofα-methyl styrene delayed and depressed the exotherm. The mechanical properties of VR resin sheets and glass fabric reinforced laminates were better than VR-1 resins; whereas LOI of VR-1 was higher. A resin formulation containing 20–30 wt% of VR: VR-1 showed optimum mechanical properties and LOI.

Keywords

Vinyl ester resin synthesis mechanical properties 

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Copyright information

© Indian Academy of Sciences 1994

Authors and Affiliations

  • P Siva
    • 1
  • I K Varma
    • 1
  • D M Patel
    • 1
    • 2
  • T J M Sinha
    • 1
    • 2
  1. 1.Centre for Polymer Science and EngineeringIndian Institute of TechnologyNew DelhiIndia
  2. 2.Gujarat State Fertilizers Company Ltd. (Polymer Unit)Gujarat StateIndia

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