摘要
在-180℃至140℃范围内,用几个频率测定了蓖麻油基AB交联聚合物的介电松弛谱。对这些聚合物的多重松弛和相行为的研究表明,试样中的两组份在介电松弛谱上显现出相容的或近似互容的特征。试样中的次级松弛归因于聚氨酯组份中链段的局部运动。提出了一个描述界面极化的方法,计算了界面极化松弛活化能,它们同试样中组份间的相容性,界面相互作用大小以及分子链的柔曲性有关。
The dielectric relaxation measurements for some AB crosslinked polymers based on cas-tor oil were carried out as a function of temperature from -180℃ to 140℃ at different fre-quencies. The multiple relaxation and phase behaviors of AB crosslinked polymers wereinvestigated with the dielectric spectroscopic analysis.The two components showed compati-bility or near compatibility based on the dielectric relaxation spectra.The secondary relaxation was attributed to the local motion of the chain segments ofpolyurethane component. The interfacial polarization of the AB crosslinked polymers wasdescribed according to a method deduced in our laboratory.The activation energies of inter-facial polarizaticn,which are related to the size of domains and the interfacial interactionbetween different components as well as the flexibility of the molecular chain in these sam-
出处
《应用化学》
CAS
CSCD
北大核心
1989年第2期15-18,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
AB交联聚合物
蓖麻油基
介电性
AB crosslinked polymers
Polyurethane based on castor oil
Dielectric property
