以正二十烷、聚乙烯和乙丙橡胶等为原料经熔融挤出,制成正二十烷含量10%～65%的共混切粒.以正十八烷微胶囊和聚乙烯为原料经熔融挤出,制成微胶囊含量10%～60%的共混切粒.采用差示扫描量热仪和熔融指数仪测试了多种组成切粒的相变性能和流动性能.切粒的热焓随相变材料含量的增高而增大,含65%正二十烷的切粒的热焓为160 J/g左右,含有60 wt%微胶囊的切粒的热焓为70 J/g左右.切粒的熔融指数随相变材料或相变材料微胶囊添加量的增高呈现指数增大或反S曲线的形式.
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