Article
  • Toughening of Epoxy Resin with PES-CTBN-PES Triblock Copolymers
  • Kim HR, Myoung BY, Song KH, Yuck JI, Yoon TH
  • PES-CTBN-PES 공중합체를 이용한 에폭시 수지의 강인성 향상 연구
  • 김형륜, 명범영, 송경헌, 육종일, 윤태호
Abstract
Amine terminated PES-CTBN-PES triblock copolymer was synthesized from PES oligomer and commercial CTBN rubber (CTBN1300 x 13), and molecular weight of the copolymer was controlled to be 15000 g/mole. The copolymer was utilized to toughen diglycidyl ether of bisphenol-A(DGEBA) epoxy resin which was cured with 4,4'-diaminodiphenylsulfone (DDS) and subjected to the measurement of thermal properties, fracture toughness (K(IC)), flexural properties and solvent resistance. The properties were compared with those from the samples modified by CTBN/PES blends. The maximum loading of copolymer into the epoxy resin was 40 wt% without utilizing solvent, at which K(IC) fracture toughness of 2.21 MPa .m(0.5) was obtained without sacrificing flexural properties and chemical resistance. However, the epoxy resin modified with PES/CTBN blend exhibited much lower K(IC) and flexural properties compared to the epoxy resins toughened by PES-CTBN-PES copolymers.

아민 말단기를 가지는 PES(6k) 올리고머와 상용 CTBN(1300×13)으로부터 분자량이 15000g/mol인 PES-CTBN-PES 공중합체를 합성하였으며, 이를 에폭시 수지의 강인화제로 사용하였다. DDS를 경화제로 사용하였으며, 공중합체로 강인화된 에폭시 수지의 열특성, 강인성, 굴곡강도 및 내용매성을 측정하여, PES/CTBN 블렌드로 강인화된 에폭시 수지의 특성과 비교하였다. 공중합체는 용매의 사용없이 에폭시 수지에 40wt%까지 첨가가 가능하였으며, 굴곡강도 및 내용매성의 저하 없이 40wt%에서 2.21MPa·m0.5의 아주 높은 강인성을 보였다. 하지만 PES/CTBN 블렌드로 강인화된 에폭시 수지는 공중합체로 강인화된 시편보다 다소 낮은 강인성, 굴곡강도 및 내용매성을 보였다.

Keywords: epoxy resin; PES-CTBN-PES copolymers; fracture toughness; flexural properties; chemical resistance

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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

  • 2001; 25(2): 246-253

    Published online Mar 25, 2001

  • Received on Aug 7, 2000