摘要
聚酰胺酸(PAA)是制备聚酰亚胺高性能材料的中间聚合物,因此聚酰胺酸溶液的流变行为对研制该类材料显得非常重要.对聚酰胺酸溶液的动态流变特性的研究发现,在低频下,储能模量G′与动态频率ω2以及损耗模量G″与ω呈线性关系;在高频下,G′和G″更趋向于与ω2/3成线性.同时,聚酰胺酸溶液表现出明显的切力变稀非牛顿流体特性,符合时温等效原理.
The rheological behaviors of polyamic acid （PAA） solution are of importance for producing high performance polyimides, since the former is the precursor of the latter. The study on the rheological behaviors of the PAA solution indicated that the storage modulus G＇ and loss modulus G＂ exhibited quadratic and linear dependence on ω^2 and ω at low frequencies, respectively. However, at high frequencies, both G＇ and G＂ become proportional to ω^2/3. The non-Newtonian flow of polyamic acid solution was accord with time-temperature equivalence principle.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第1期12-14,32,共4页
Journal of Donghua University(Natural Science)
基金
上海市青年科技启明星跟踪资助计划(06QH14001)
关键词
聚酰胺酸(PAA)
动态流变
时温等效
polyamic acid （PAA）
dynamic rheology
time-temperature equivalence
