Phase separation time/temperature dependence of some thermoplastics-modified thermosetting systems

• 来源期刊: 中国高等学校学术文摘·化学
• 关键词: polymerization induced phase separation thermosetting thermoplastic time and temperature dependence Arrhenius equation
• 年，卷（期）: 2008,（4）
• 页码范围: 471-479
• 页数: 9页
• 语种: 英文
• DOI: 10.1007/s11458-008-0056-6

摘要

The phase separation processes of various ther-moplastics-modified thermosetting systems which show upper critical solution temperature (UCST) or lower crit-ical solution temperature (LCST) were studied with emphasis on the temperature dependency of the phase separation times. It was found that the phase separation time-temperature relationship follows the Arrhenius equation. The cure-induced phase separation activation energy Ea(ps) generated from the equation is independent of the method used to measure phase separation time. In our experimental ranges it is found that Ea (ps) is inde-pendent of the thermoplastic (TP) content,TP molecular weight and curing rate but it varies with the cure reaction kinetics and the chemical environments of the systems.