THERMOTROPIC RIGID CHAIN COPOLYMERS .1. CRYSTALLIZATION KINETICS AND THERMODYNAMIC PROPERTIES

被引：21

作者：

SAUER, TH ^{[1
]}

ZIMMERMANN, HJ ^{[1
]}

WENDORFF, JH ^{[1
]}

机构：

[1] DEUTSCH KUNSTOFF INST,SCHLOSSGARTENSTR 6R,D-6100 DARMSTADT,FED REP GER

来源：

COLLOID AND POLYMER SCIENCE | 1987年 / 265卷 / 03期

关键词：

CRYSTALLIZATION; -; Thermodynamics; CRYSTALS; Structure; LIQUID; Nematic;

D O I：

10.1007/BF01412709

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The kinetics of structure formation and the thermal properties of the ordered phase were analyzed calorimetrically for a rigid polymer, characterized by an irregular chemical structure. The transition from the nematic melt to a partially ordered state was found to involve two different processes, a fast and a slow one. The fast one corresponds apparently to a thermally activated nucleation and growth mechanism, whereas the slow one is strongly self delaying. Its transition rate is only weakly dependent on the temperature. The thermal properties of the ordered phase, resulting from this process, vary strongly with the annealing temperature and annealing time. The enthalpy and entropy of fusion, characteristic for the pure ordered phase, are lower by a factor of about 10 in comparison to the corresponding values of flexible chain molecules.

引用

页码：210 / 219

页数：10

共 20 条

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