聚丙烯
挤压
流变学
材料科学
复合材料
粘度
塑料挤出
老化
模具(集成电路)
挤出成型
聚合物
限制
机械工程
工程类
纳米技术
生物
遗传学
标识
DOI:10.1016/0141-3910(86)90020-0
摘要
The problems associated with the repeated extrusion of polypropylene and the changes in properties induced by this treatment have been studied Rheological properties of the melt; namely, the course of the flow curves and the growth of the profiles on the discharge side of the extrusion die, have been evaluated. The consequences of repeated extrusion are further projected into the processes of weathering and accelerated ageing, measured on the basis of the changes of the mechanical properties, the limiting viscosity number and the oxidation of the polymer.
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