摘要
采用旋转流变仪研究了苯乙烯-丁二烯-苯乙烯(SBS)嵌段聚合物接枝α-甲基丙烯酸(MAA)、甲基丙烯酸甲酯(MMA)接枝共聚物(SBS-g-MAA,SBS-g-MMA)的动态流变性能。结果表明:接枝共聚物的黏流活化能降低, 温度敏感性降低;比较改性前后的共聚物的主曲线,接枝共聚物的相对分子质量分布变宽,在剪切应力作用下,黏度下降较快;接枝共聚物的相对分子质量分布变宽,接枝共聚物的抗氧化性增强。
SBS was grafted with methyl acrylic acid （MAA） and methyl methacrylate （MMA）, respectively, via radiation. The theological behavior of the copolymers was compared with that of neat SBS. The graft copolymer showed lower flow activation energy and temperature sensitivity. Since the grafting broadened the molecular weight distribution, the copolymers exhibited a greater extent of shear thinning. The grafting also provided a higher oxidation resistance.
出处
《中国塑料》
CAS
CSCD
北大核心
2006年第3期56-59,共4页
China Plastics
