Phase separation kinetics in mixtures of polymers and liquid crystals

被引：12

作者：

Golemme, A ^{[1
]}

Urso, A ^{[1
]}

De Simone, BC ^{[1
]}

Mashin, A ^{[1
]}

Chidichimo, G ^{[1
]}

机构：

[1] Univ Calabria, Dipartimento Chim, I-87030 Rende, Italy

来源：

LIQUID CRYSTALS | 1998年 / 24卷 / 04期

关键词：

D O I：

10.1080/026782998207037

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Light scattering has been used to study phase separation kinetics in mixtures containing liquid crystals and epoxy resins. In the samples studied, phase separation was induced by the polymerization of the resins with an appropriate curing agent. Experiments were carried out at different compositions and at different temperatures. The results show that the kinetic mechanism of phase separation is composition dependent. For high liquid crystal content the data are in qualitative agreement with existing theories describing spinodal decomposition; at lower concentrations the mechanism is different. The physical properties of the resulting materials are independent of the decomposition mechanism. The data have also been analysed considering the scaling behaviour expected for late stages of phase separation in polymeric mixtures. Samples obtained in a narrow concentration range, where the two kinetic mechanisms overlap, exhibit peculiar physical properties.

引用

页码：563 / 568

页数：6

共 22 条

[1] POLYMER-POLYMER PHASE-BEHAVIOR [J].