采用烯烃配位共聚合的方法制备了支链末端带羟基的功能化聚乙烯大分子引发剂,然后采用缩水甘油开环聚合的方法合成了线性-超支化接枝共聚物(LHGCs),并对聚合物末端进行功能化,获得末端为苯酯基的线性-超支化接枝共聚物(LHGCs-Bz).通过傅里叶红外光谱(FTIR)、核磁分析表征了所合成聚合物的结构.采用TGA、DSC对聚合物热性能进行研究,表明接枝聚合物具有很好的热稳定性.XRD测试表明端基和超支化支链对线性聚乙烯链的结晶性能有一定影响.通过将LHGCs-Bz作为增容剂加入到线性低密度聚乙烯/聚己内酯(LLDPE/PCL)共混体系,证明了LHGCs-Bz这种同时拥有非极性聚乙烯主链和极性超支化聚醚支链的聚合物有一定的增容性,共混体系的相尺寸随增容剂的加入而减小,并且与极性/非极性的嵌段比例有关.
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