摘要
较全面综述了热致液晶性芳香族共聚酯(TLCP)熔体流变学的最新研究成就,指出TLCP熔体具有许多特征流变行为,存在屈服应力、低粘度、负第一法向应力差、孔口收缩、长松弛时间及它们显著的剪切速率(振动频率)、温度、时间和热历史的依赖性。
New results and the frontier problems of the rheology of aromatic copolyesters in the liquid crystalline melts are reviewed. It is demonstrated that the copolyester liquid crystalline melts possess a lot of characteristic rheological behaviour: exhibiting yield stress, lower viscosity, negative primary normal-stress difference, extrudate contraction and longer relaxation time which markedly depend on shear rate(oscillatory frequency), temperature, time and thermal history.
出处
《高分子通报》
CAS
CSCD
1991年第4期222-230,共9页
Polymer Bulletin
关键词
芳香族共聚酯液晶熔体
稳态流变学
动态流变学
瞬态流变学
相变流变学
Copolyester liquid crystalline melt, steady state rheology, dynamic theology, transient rheology, rheology of phase transition
