采用固定引发剂(DCP)及助交联荆(DVB)配比,增加DCP/DVB用量对聚丙烯(PP)材料进行交联改性,利用EWF方法评价了材料断裂行为,并探讨了结构变化对断裂性能的影响.研究表明,不同DCP/DVB改性剂用量对PP链结构及断裂行为产生较大的影响,改性剂的加入有利于交联结构等的形成,进而限制分子链间或晶粒间的相互移动;交联结构较少时,材料的比基本断裂功We值减小,比非基本断裂功βWp有所增加;而当交联结构较多时,We值有所回升,βWn有所降低.
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