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Structure and Performance of β Crystalline Polypropylene Hybrid Composites
Author(s): 
Pages: 558-561
Year: Issue:  4
Journal: JOURNAL OF CHEMICAL ENGINEERING OF CHINESE UNIVERSITIES

Keyword:  聚丙烯交联纳米填料热处理成核剂;
Abstract: 为了了解β晶型聚丙烯混杂复合体系的结构和性能,研究了β晶型聚丙烯在化学交联、添加纳米填料和热处理后的力学性能变化规律.结果表明5%~10%(wt)纳米CaCO3填料或2%(wt)交联剂与0.5%(wt)β晶型成核剂TMB共用时对聚丙烯有优良的增强、增韧效果;在80~150℃热处理温度范围内,加有0.5%(wt)TMB的聚丙烯在130℃时有最小的抗拉强度.经X衍射分析、差热分析证明在0.4%~0.8%(wt)TMB的用量范围内,对聚丙烯的β晶体的有序性和结晶效率影响不大,在0.5%(wt)成核剂TMB用量时,聚丙烯有最大的结晶度,130℃热处理可进一步提高聚丙烯β晶的结晶效率和总结晶度,结晶温度和熔融温度;加入纳米填料对β晶型聚丙烯的总结晶度和结晶效率影响不大,对有序性有较大的影响;而加入2%(wt)交联剂大大增加了总结晶度,同时大幅降低了β晶的有序度.偏光显微测试发现,纳米填料加入可降低球晶的尺寸和诱导纤维状的β晶形成.
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