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논문 기본 정보

자료유형
학술저널
저자정보
Rhee, Do-Mook (Samyang Group Central R & D Center) Ha, Wan-Shik (Department of Fiber and Polymer Science, Seoul National University) Youk, Ji-Ho (Department of Chemistry, University of Alabama at Birmingham) Yoo, Dong-Il (Department of Textile Engineering, Chonnam National University)
저널정보
한국섬유공학회 Fibers and Polymers Fibers and polymers 제2권 제2호
발행연도
2001.1
수록면
86 - 91 (6page)

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초록· 키워드

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Liquid crystalline (LC) poly(ethylene terephthalate-co-2(3)-chloro-1,4-phenylene terephthalate) [copoly(ET/CPT)] was prepared using poly(ethylene terephthalate) (PET) as a flexible spacer, terephthalic acid (TPA), and chlorohydroquinone diacetate (CHQDA). All reactions involved in the copolymerization were investigated using some model compounds: TAP was used for acidolysis, diphenylethyl terephthalate (DPET) for interchange reaction between PET chains, and 야-o-chlorophenyl terephthalate (DOCT) and di-m-chlorophenyl terephthalate (DMCT) for interchange reaction between PET and rigid rodlike segments. Activation energies obtained for the acidolysis of PET with TPA and for interchange reaction of PET with DPET, DOCT, and DMCT were 19.8 kcal/mol, 26.5 kcal/mole, and 45.9 kcal/mole, respectively. This result supports that the copolymerization proceeds through the acidolysis of PET with TPA first and subsequent polycondensation between carboxyl end group and CHQDA or acetyl end group, which is formed from the reaction of CHQDA and TPA. Also, it was found that ester-interchange reaction can be influenced by the steric hindrance. Copoly(ET/CPT)s obtained has ethylene acetate end groups formed from acetic acid hydroxy ethylene end groups and showed almost the random sequence distribution for all compositions.

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