주 사슬에 유연 격자를 포함한 새로운 공중합체

• 영문명: The new Copolymers which contain Flexible Spacers in the Main Chain
• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: 김기식(Key Seek Kim)
• 간행물 정보: 『한국응용과학기술학회지』한국유화학회지 제16권 제3호, 255~262쪽, 전체 8쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 1999.09.30

영문 초록

The new copolymers which contain flexible spacers in main chain were prepared and their properties were studied. the copolymers were synthesized in the melt polymerization melted from diacetoxynaphthalene isomers, α,Ωbis(4-carboxyphenoxy) alkanes and p-acetoxy benzoic acid in the molar ratio of 1:1:2 and characterized for the effects of structure of naphthalenediol isomer moieties and the spacers on thermal crystalline and liquid crystalline properties of the resulting polymers. Diacetoxy naphthalene isomers were used 1. 5-,1. 6-,2. 6-and 2. 7-disubstituted ones and the spacers was either tetramethylene or decamethylene. The polymer was characterized by elemental and spectropic analysis, differential scanning calorimetry (DSC) on a polaring microscope, wide-angle X-ray diffractometry and thermogravimetry (TGA). There glass transition temperatures (Tg) and melting temperature (Tm) on the structure of the naphthalenediol isomer moieties and the length of the spacers. The presence of spacers was found to the helpful in crystallization of 1. 6-naphthalenediol copolyesters. The presence of amide group in the backbone chain of polymer was found to increase transition temperature, crystallization, thermal stability of polymers but to decreas solubility.

목차

Abstract

Ⅰ. 서론

Ⅱ. 실험

Ⅲ. 곁과 및 고찰

Ⅳ. 결론

참고문헌