高流动性聚丙烯的制备及性能

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英文篇名：Preparation and performance study of high-fluidity polypropylene 作者：李代文 ; 周杰 ; 刘金花 ; 杨国刚 ; 姚玉元 英文作者：LI Daiwen;ZHOU Jie;LIU Jinhua;YANG Guogang;YAO Yuyuan;Silk Institute, College of Material and Textiles, Zhejiang Sci-Tech University;Zhenshi Group Huamei New Materials Co., Ltd.; 关键词：聚丙烯 ; 高流动性 ; 2 ; 5-二甲基-2 ; 5-二(叔丁基过氧基)己烷 ; 有机过氧化物 英文关键词：polypropylene;;high fluidity;;2,5-dimethyl-2,5-bis(tetra-butyl-peroxy) hexane;;organic peroxide 中文刊名：ZJSG 英文刊名：Journal of Zhejiang Sci-Tech University(Natural Sciences Edition) 机构：浙江理工大学材料与纺织学院丝绸学院;振石集团华美新材料有限公司; 出版日期：2018-11-01 14:35 出版单位：浙江理工大学学报(自然科学版) 年：2019 期：v.41 语种：中文; 页：ZJSG201902003 页数：8 CN：02 ISSN：33-1338/TS 分类号：24-31

摘要

论文以负载有机过氧化物2,5-二甲基-2,5-二(叔丁基过氧基)己烷的聚丙烯粒子(MB-CR PP)为断链剂,通过可控流变法制得高流动性聚丙烯。使用GPC、DSC、TG和毛细管流变仪等仪器对MB-CR PP改性后的聚丙烯的分子量及其分布、结晶性能、热稳定性和流变性能等进行研究,并通过测试其熔融指数和各项力学性能指标,探究MB-CR PP对聚丙烯流动性和力学性能的影响。结果表明:随着MB-CR PP用量的增加,聚丙烯的微观表现为聚丙烯分子量下降和分布变窄,宏观表现为剪切粘度下降及流动性大幅提高,但热稳定性性和力学性能略有下降。
        In this study, polypropylene particle(MB-CR PP) loaded with organic peroxide 2,5-dimethyl-2,5-bis(tetra-butyl-peroxy) hexane was selected as the chain scission agent to prepare high-fluidity polypropylene with controlled rheology method. GPC、DSC、TG and capillary rheometer were used to study the molecular weight and its distribution, crystallization property, thermal stability and rheological property of polypropylene modified with various MB-CR PP. Furthermore, the effects of MB-CR PP on fluidity and mechanical properties of polypropylene were investigated by the measurement of melt index and mechanical properties. The results showed that molecular weight of polypropylene decreased and its distribution became narrow with the increase of MB-CR PP on the micro level. Meanwhile, shear viscosity of polypropylene decreased and fluidity was drastically enhanced, but thermal stability and mechanical properties suffered slightly decline on the macro level.

引文

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