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Effect of structure on properties of vinyl ester resins

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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.

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Authors and Affiliations

  1. Centre for Polymer Science and Engineering, Indian Institute of Technology, 110 016, New Delhi, India

    P Siva, I K Varma, D M Patel & T J M Sinha

  2. Gujarat State Fertilizers Company Ltd. (Polymer Unit), Dist Vadodara, P.O. Petrofils, Gujarat State, India

    D M Patel & T J M Sinha

Authors
  1. P Siva
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  2. I K Varma
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  3. D M Patel
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  4. T J M Sinha
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Siva, P., Varma, I.K., Patel, D.M. et al. Effect of structure on properties of vinyl ester resins. Bull. Mater. Sci. 17, 1095–1101 (1994). https://doi.org/10.1007/BF02757587

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  • DOI: https://doi.org/10.1007/BF02757587

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