Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Preparation and Curing Properties of Unsaturated Polyester Resins Based on Depolymerized Poly(ethylene terephthalate)

해중합 PET를 이용한 불포화 폴리에스테르 수지의 제조 및 경화 특성

  • 김준호 (영남대학교 공과대학 섬유학부) ;
  • 박찬준 (영남대학교 공과대학 섬유학부, 전남대학교 공과대학 섬유공학과)
  • Published : 1998.02.01

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Abstract

We investigated the possibility of using PET oligomers, which are made from PET waste by glycolysis, as the raw material for the synthesis of unsaturated polyester resin. The unsaturated and saturated polyester resins were synthesized from PET oligomer, propylene glycol, maleic anhydride and phthalic anhydride. The basic properties of these resins were analyzed and the curing characteristics were evaluated by DSC method. The reactivity of maleic anhydride to the glycols containing PET oligomer was higher than that of phthalic anhydride. Isothermal DSC method was properly applied to measure the curing reactivities of polyester resins, and the curing time of resin was decreased with increasing temperature. With the smaller ratio of glycol component to acid component in the reactants, we could prepare the unsaturated polyester resins of the higher molecular weight and the better curability.

Keywords

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