聚丙烯／碳酸钙复合材料的研制 关键词】共聚聚丙烯；碳酸钙；填充改性；增韧 [gap=1029]Keywords：copolypropy1ene；calcium carbonate；filling modification；toughening
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Blending modification, filling modification and hybrid modification of PP are studied in this paper.
本课题主要研究了聚丙烯的共混改性，填充改性以及混杂改性。
Based on selection of plastic material and filling agent, filling and modifying for the plastic are performed by the mechanism of plastic filling and modification.
利用塑料填充改性机理，在进行塑料原料、填加剂选择基础上，进行塑料填充改性工作。
This article introduces the modification on liquid ammonia filling system.
介绍了液氨充装系统改造情况，取得了较好的效果。
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