近年来非晶聚合物玻璃态-橡胶转变及分子运动受到众多学者关注.α'转变被证实在非晶聚合物玻璃态-橡胶转变区中普遍存在,Rouse运动模型能较好地描述其转变机理,即转变区中包含有链段、Sub-Rouse、Rouse不同长度单元的运动及转变.其转变行为主要受屏蔽效应和耦合作用的影响,屏蔽效应影响转变区的宽度,而耦合作用影响转变耗散峰的大小.对于具有较强屏蔽效应和耦合作用的聚合物,由于动态脆性较强和转变区较窄,不同运动模式的转变难以被分离而观察到.文中综述了能有效分离和观察不同运动及转变的增塑、稀释以及二维相关谱图等方法,总结了考察分子运动及转变行为的表征手段,对进一步研究进行了展望.
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