폴리에틸렌테레프탈레이트와 폴리에틸렌나프탈레이트간의 에스테르 교환반응에 대한 연구

김우성; 육지호; 하완식; 박수영; 박종래

Polymer(Korea), Vol.21, No.5, 794-802, September, 1997

Export Citation

폴리에틸렌테레프탈레이트와 폴리에틸렌나프탈레이트간의 에스테르 교환반응에 대한 연구

A Study on the Ester Interchange Reaction between Poly(ethylene terephthalate) and Poly(ethylene naphthalate)

김우성, 육지호, 하완식, 박수영, 박종래

초록

폴리에틸렌테레프탈네이트(PET)와 폴리에틸렌나프탈레이트(PEN)의 에스테르 교환반응에 의한 공중합체의 생성과정을 말단공격에 의한 교환반응과 직접 에스테르 교환반응의 두 반응기구로 나누어 컴퓨터 모사와 실험을 통하여 고찰하였다. 컴퓨터 모사 결과 분자량 분산도는 말단공격에 의한 반응만을 할 경우가 더 빨리 평형치 2에 도달하셔 랜덤화도는 직접 에스테르 교환반응만을 할 경우가 더 빨리 평형치 1에 도달하게 됨을 알았다. 실험적으로는 PET, 말단 히드록시기를 봉쇄한 PET (B-PET), PEN 그리고 말단 히드록시기를 통쇄한 PEN (B-PEN)의 조합을 이용한 에스테르 교환반응을 통하여 말단공격에 의한 반응이 분자간 직접 에스테르 교환반응보다 우세하다는 것을 확인하였다.

The effect of two ester interchange reactions, end-attack and direct interchange, on the polydispersity index and the degree of randomness in the copolymer of poly(ethylene terephthalate) (PET)/poly(ethylene naphthalate) (PEN) was systematically investigated using both computer simulation and experimental methods. It is revealed from the computer simulation that the end-attack reaction leads the polydispersity index much rapidly to the equilibrium value at about 2 while direct interchange reaction brings the degree of randomness much effectively to the equilibrium value at about 1 It was experimentally confirmed from the ester interchange reaction in the pairs, i.e. PET/PEN, B-PET/PEN, PET/B-PEN, B-PET/B-PEN that end-attack reaction was much more dominant than the direct interchange reaction.

Keywords:poly(ethylene terephthalate) (PET);poly(ethylene naphthalate) (PEN);computer simulation;polydispersity index;degree of randomness;end-attack;direct interchange reaction

[References]

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