不同热塑性树脂改性热固性树脂体系反应诱导相分离过程的时间/温度依赖性  

THE TIME/TEMPERATURE RELATIONSHIP DURING PHASE SEPARATION OF DIFFERENT THERMOPLASTIC MODIFIED THERMOSETTING SYSTEMS

作　　者：张秀娟[1] 益小苏[2] 许元泽[1] 

机构地区：[1]复旦大学高分子科学系国家教育委员会聚合物分子工程开放实验室,上海200433 [2]北京航空材料研究院,北京100095

出　　处：《高分子学报》2007年第8期725-730,共6页Acta Polymerica Sinica

基　　金：国家重点基础研究发展计划(973计划;项目号2003CB615604);国家自然科学基金(基金号20490220)资助项目

摘　　要：对几种不同热塑性树脂改性热固性树脂体系反应诱导相分离过程,包括UCST(最高互溶温度)、LCST(最低互溶温度)体系和含有复杂多步反应体系,在耐高温高分辨热台显微镜、流变仪和小角激光光散射仪上进行了研究.发现体系的反应诱导相分离时间/温度关系遵循Arrhenius方程.其相分离活化能对体系反应速率、粘弹性变化、体系中热塑性树脂的含量和分子量不敏感,也不受相分离检测手段的影响,而依赖于树脂化学环境相容性和交联反应的温度依赖性.对这一共性的物理本质进行了讨论.The phase separation processes of various thermoplastics modified thermosetting systems including the UCST, LCST systems and the system with complex crosslinking reaction were experimentally studied with emphasis on the temperature dependency of the phase separation time. It was found that the Arrhenius type function can well describe the phase separation time/temperature relation, no matter how the viscoelastic and hydrodynamic factors were changed. Also, the activation energy keeps constant with the variations of TP content, TP molecular weight, curing rate and phase separation detecting means, while it varies with the chemical environment compatibility and the time/temperature dependence of the cure reaction.

关 键 词：反应诱导相分离 热固性树脂 热塑性树脂 时温依赖性 Arrhenius方程 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]