MESOMORPHIC BEHAVIOR AND MULTIPLE MELTING TRANSITION OF AROMATIC POLYESTER FRACTIONS

LIU Xiaopin; HU Shiru; ZHANG Xian; SHI Lianghe; XU Mao; ZHOU Qifeng; DUAN Xiaoqing

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MESOMORPHIC BEHAVIOR AND MULTIPLE MELTING TRANSITION OF AROMATIC POLYESTER FRACTIONS

Papers | Updated：2021-06-21

- MESOMORPHIC BEHAVIOR AND MULTIPLE MELTING TRANSITION OF AROMATIC POLYESTER FRACTIONS
- Vol. 6, Issue 4, Pages: 337-344(1988)
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- Published：20 December 1988
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LIU Xiaopin, HU Shiru, ZHANG Xian, et al. MESOMORPHIC BEHAVIOR AND MULTIPLE MELTING TRANSITION OF AROMATIC POLYESTER FRACTIONS[J]. 1988, 6(4): 337-344.
DOI：

LIU Xiaopin, HU Shiru, ZHANG Xian, et al. MESOMORPHIC BEHAVIOR AND MULTIPLE MELTING TRANSITION OF AROMATIC POLYESTER FRACTIONS[J]. 1988, 6(4): 337-344. DOI：

摘要

Fractions of an aromatic polyester have been studied by DSC

polarizing microscopy

SALS and WAXS techniques. The intrinsic viscosity of the samples in tetrachloroethane is ranging from 0.197 to 0.591dl / g. All the samples exhibit enantiotropic liquid crystal behavior

and the thermal stability of mesophase decrease withlowering the molecular weight of the fractions. The glass transition temperature keeps almost constant for allthe samples

however its value for supercooled mesophase is about 20℃ lower than that for amorphous phase.Multiple melting phenomenon was also found for samples crystallized from their mesophases and was similar to that observed for nonliquid crystal forming polymers.

Abstract

Fractions of an aromatic polyester have been studied by DSC

polarizing microscopy

SALS and WAXS techniques. The intrinsic viscosity of the samples in tetrachloroethane is ranging from 0.197 to 0.591dl / g. All the samples exhibit enantiotropic liquid crystal behavior

and the thermal stability of mesophase decrease withlowering the molecular weight of the fractions. The glass transition temperature keeps almost constant for allthe samples

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