Polymer(Korea), Vol.20, No.3, 439-446, May, 1996
Dicyanovinyl기를 포함하는 폴리아릴레이트의 합성과 그들의 열적 성질
Preparation of Dicyanovinyl-Containing Polyarylates and Their Thermal Properties
초록
Dicyanovinyl기를 포함한 폴리아릴레이트를 terephthaloyl chloride 및 p-bis(1-chloro-2,2-dicyanovinyl)benzene (2)과 alkyl, sulfide, sulfone, ether 그리고 ester 결합을 가진 방향족 디올들과 계면 중합에 의하여 합성하였다. 생성된 중합체들는 고유 점도가 0.24-0.42dL/g이었으며 80℃에서 극성 반양자성 용매인 DMF, DMSO, NMP 및 DMAc 등에 잘 녹았다. Alkyl ether 그리고 ester기를 가진 방향족 디을부터 합성된 중합체는 THF에도 매우 잘 녹았다. 중합체들은 350℃ 부근에서 정점을 이루는 발열 피이크를 보여 주는데 이때 열에 의한 경화 반응이 진행되어 불용성 물질이 형성되었다. 중합체들 6과 7을 제외하고, 거의 모든 중합체가 400∼465℃사이에서 10% 중량 감량을 나타내었으며, 500℃에서 잔사량은 73∼84%로서 열안정성을 보여주었다.
Polyarylates containing dicyanovinyl moiety were prepared by interfacial polymerization of terephthaloyl chloride and p-bis(1-chloro-2,2-dicyanovinyl)benzene (2) with various diphenol derivatives containing alkyl, sulfide, sulfone, ether and ester group. The resulting polymers possessed intrinsic viscosities of 0.24-0.42dL/g and they are easily soluble in polar aprotic solvents such as DMF, DMSO, NMP and DMAc at 80℃. The polymers derived from diphenols with alkyl ether and ester units were even soluble in common organic solvent such as THF. These polymers showed a large exotherm in differential scanning calorimetry and undergo a curing reaction around 350℃ to form insoluble materials. Almost all the polyarylates, except 6 and 7 exhibited a decomposition with 10% weight loss between 400-465℃ in nitrogen and displayed 73∼84% residual weight at 500℃.
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