Molecular orientation behavior in uniaxially stretched biphasic polystyrene-based ionomers
Molecular orientation behavior in uniaxially stretched biphasic polystyrene-based ionomers
复制标题
单轴拉伸双相聚苯乙烯基离聚物的分子取向行为
DOI：
10.1021/ma00062a018
复制
发表时间：
1993
期刊：
影响因子：
5.5
通讯作者：
C. Bazuin
中科院分区：
文献类型：
--
作者：
Xiaodong Fan;C. Bazuin
用红外二向色性比较了苯乙烯-苯乙烯磺酸钠共聚物（PS-SSA-Na）和苯乙烯-甲基丙烯酸钠共聚物（PS-MAA-Na）的分子取向行为。离聚物的取向功能，确定在几个离子含量和拉伸温度。观察到PS-SSA-Na离聚物的聚苯乙烯链段的取向明显大于PS-MAA-Na离聚物的取向。通过比较在拉伸温度下相对于每种离聚物的簇转变温度测量的取向函数，取向的大部分差异可以归因于不同的离子强度，其导致PS-SSA-Na的簇转变在比PS-MAA-Na高得多的温度下发生
The molecular orientation behavior of poly[styrene-co-(sodium styrenesulfonate)] (PS-SSA-Na) and poly(styrene-co-(sodium methacrylate)] (PS-MAA-Na) is compared using IR dichroism. The orientation functions of the ionomers are determined at several ion contents and stretch temperatures. It is observed that the orientation of the polystyrene segments of PS-SSA-Na ionomers is significantly greater than that of PS-MAA-Na ionomers. By comparing the orientation functions measured at stretch temperatures relative to the cluster transition temperature of each ionomer, much of the difference in orientation can be attributed to differing ionic strengths that cause the cluster transition of PS-SSA-Na to occur at a much higher temperature than that of PS-MAA-Na