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다양한 블록 길이를 갖는 Polycarbonate-Poly(methyl methacrylate) 공중합체의 제조에 관한 연구
A Study on the Preparation of Polycarbonate-Poly(methyl Methancrylate) Copolymers with Varying Block Lengths
HWAHAK KONGHAK, August 1997, 35(4), 514-519(6), NONE
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Abstract
Bisphenol-A의 크래킹에 의해 합성한 p-isopropenylphenol을 분자량이 조절된 폴리카보네이트(PC)의 제조에 사용하였다. 말단정지제로 p-isopropenylphenol을 사용하여 triphosgene과 bisphenol-A의 계면중합에 의해 말단 비닐기를 함유한 PC를 합성하였고, 이때 사용한 p-isopropenylphenol의 중량분율에 따라 2,000-44,000의 수평균 분자량을 갖는 PC를 얻을 수 있었다. 위에서 제조한 PC와 MMA 단량체를 부가 공중합시켜 다양한 블록 길이를 갖는 PC-PMMA 공중합체를 제조하였다. 공중합체의 구조 및 블록 비는 FT-IR, 원소분석, 1H-NMR에 의해 조사하였다. 공중합체의 블록 비는 주로 PC와 MMA 단량체의 중량비에 의해 조절되었다. 특히 이와 같은 공중합체는 광학 현미경의 관찰로부터 PC/SAN 블렌드의 상용성을 향상시키는 것을 알 수 있었다.
A p-isopropenylphenol synthesized by cracking of bisphenol-A was used in the preparation of molecular-weight-controlled polycarbonate(PC). PC containing a vinyl moiety in the terminal group was synthesized by interfacial polymerization of bisphenol-A and triphosgene using p-isopropenylphenol as a chain terminator. PC with the number average molecular weight of 2,000 - 44,000 can be obtained depending on the weight fractions of p-isopropenylphenol. PC-PMMA copolymers with varying block lengths were prepared by addition copolymerization of the PC and MMA monomer. The structure and block ratios of the copolymers were investigated through the measurements of FT-IR, elemental analysis and 1H-NMR. The block ratios of the copolymers are mainly controlled by the weight ratios of PC and MMA. Observations of PC/SAN blends containing these copolymers via optical microscopy indicated that the copolymers improved the compatibility of PC/SAN blends.
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References
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