Dielectric characterization of a thermotropic liquid crystalline copolyesteramide: 2. Orientation and crystallinity

被引：6

作者：

Boersma, A ^{[1
]}

van Turnhout, J ^{[1
]}

Wubbenhorst, M ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Sci Appl, Dept Polymer Technol, NL-2628 BL Delft, Netherlands

来源：

MACROMOLECULES | 1998年 / 31卷 / 21期

关键词：

D O I：

10.1021/ma981287b

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The dielectric characterization of a thermotropic liquid crystalline copolyesteramide was extended. The influence of orientation and crystallization was studied. An effect of the draw ratio on the dielectric properties in the transverse direction was hardly found. However, the orientation of the sample in the electric field (parallel or perpendicular) showed a significant effect. The birefringence predicted from the dielectric data at high frequencies agrees well with the optical value. Annealing of extruded and compression-molded samples resulted in an increase of the ct relaxation peak.

引用

页码：7461 / 7466

页数：6

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