战术性
材料科学
心轴
挤压
聚丙烯
复合材料
形态学(生物学)
上部结构
成核
结晶
旋转(数学)
聚合物
化学工程
聚合
结构工程
几何学
生物
工程类
有机化学
化学
遗传学
数学
作者
Min Nie,Rui Han,Qi Wang
摘要
In this work we successfully controlled formation and alignment of a crystal superstructure in an isotactic polypropylene (iPP) pipe via self-assembly of a β nucleating agent and rotation extrusion to tailor the performances of the iPP pipe. The results showed that during iPP pipe extrusion, β nucleating agents first self-assembled into the fibrous structure, and then were aligned off the axial direction through rotation of the mandrel and die in the self-designed rotation extrusion device. Accordingly, fibrils, as oriented templates, directed the epitaxial growth of iPP to yield hybrid shish-kebabs off the axial direction which was composed of β crystals, so as to achieve simultaneous hoop reinforcement and toughening of the iPP pipe.
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