Article
  • Curing Behaviors and Mechanical Properties of Unsaturated Polyester Resins with Different Glycol Molar Ratios
  • Lee SH, Lee JO
  • 글리콜 몰비가 다른 UPE 수지의 경화거동과 물성에 관한 연구
  • 이상효, 이장우
Abstract
In order to improve the mechanical properties of unsaturated polyester(UPE) resins, the UPE resins with different glycol molar ratios were prepared. The effects of molar ratios of the UPE resins on the curing behaviors and mechanical properties were investigated. The microgel reaction mechanism was employed to characterize the system. It was found that the final conversion increased with increasing NPG molar ratios, and the conversion at the peak of differential scanning calorimetry(DSC) thermogram appeared to decrease with increasing NPG molar ratios. The flexural strength, tensile modulus, water resistence, and infiltration increased with increasing NPG content, but the tensile strength, tensile elongation, and flexural modulus decreased. Among the UPE resins prepared from the glycols with the molar ratios(PG/NPG) of 0.5/0.5, 0.25/0.75, those of laminated composites plates showed better mechanical properties.

본 연구에서는 불포화 폴리에스테르 수지의 기계적 물성을 증진시키기 위하여 프로필렌그리콜(PG)과 네오펜틸글리콜(NPG)의 몰비를 달리한 불포화 폴리에스테르 수지를 제조하여 경화거동 및 기계적 물성을 조사하였다. 경화거동은 microgel reaction methanism을 이용하여 설명하였고, NPG 몰비의 증가는 최종 전화율을 증가시키나 경화속도가 늦어짐을 알 수 있었다. 그리고 글리콜 몰비중에서 NPG 몰비의 증가는 굴곡강도, 인장탄성율, 흡수율, 함침성이 증가하였고, 반면에 인장강도, 신율, 굴곡탄성율이 감소하는 경향으로 나타났다. 따라서 중합한 불포화 폴리에스테르 수지에서 PG/NPG 몰비가 0.5/0.5, 0.25/0.75의 영역일 때 섬유강화 플라스틱 복합재료의 물성이 우수한 것으로 관찰되었다.

Keywords: mechanical properties; unsaturated polyester; curing behavior; laminated composites

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2000; 24(5): 599-609

    Published online Sep 25, 2000