TRANSIENT ISOTHERMAL ELONGATIONAL FLOW OF THERMOTROPIC LIQUID-CRYSTALLINE POLYMERS

被引：5

作者：

TUREK, DE

SIMON, GP

SMEJKAL, F

GROSSO, M

INCARNATO, L

ACIERNO, D

机构：

[1] CEAST SPA,I-10146 TURIN,ITALY

[2] UNIV SALERNO,DIPARTIMENTO INGN CHIM & ALIMENTARE,I-84084 FISCIANO,ITALY

来源：

POLYMER | 1993年 / 34卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

THERMOTROPIC LIQUID CRYSTALLINE POLYMERS; EXTENSIONAL FLOW; ELONGATIONAL FLOW; RHEOLOGY; SEMICRYSTALLINE; AMORPHOUS;

D O I：

10.1016/0032-3861(93)90306-U

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 shear and transient isothermal extensional flow properties of a semicrystalline and an amorphous thermotropic liquid crystalline polymer are investigated. Independent estimates of the relationship between extensional viscosity and strain rate are derived from the measurement of (i) pressure loss in converging flow and (ii) filament tension in isothermal fibre spinning. The former material, a copolyester of hydroxybenzoic acid and naphthoic acid, flows readily in extension and shear. Results for the amorphous material suggest the need for a more detailed investigation of important elongational flow properties.

引用

页码：204 / 206

页数：3

共 16 条

[1]

Baird D. G., 1985, Polymeric Liquid Crystals. Proceedings of the Second Symposium, P119

[2] AN APPROXIMATE ANALYSIS FOR CONTRACTION AND CONVERGING FLOWS [J].