β成核剂和PET纤维对PP力学性能的影响
发布时间:2018-07-06 13:04
本文选题:聚丙烯 + PET纤维 ; 参考:《塑料》2017年02期
【摘要】:为提升聚丙烯(PP)韧性同时保持较大的刚性,以PP为基体,通过添加β-成核剂、PET纤维以及PP-gMAH制备复合材料,并研究复合材料的晶型结构及力学性能。结果表明:PP主要形成α-晶,加入β-成核剂则主要形成β-晶,且具有较大的冲击强度。加入PET纤维,可提高PP和β-PP的拉伸性能,随着PET纤维的增加,复合材料的拉伸强度逐渐提高,但冲击强度和断裂伸长率明显下降。相对而言,β-PP复合材料的冲击强度是PP复合材料的2倍,同时能保持较大的拉伸强度和弹性模量。经PP-g-MAH增容,可同时提高PP和β-PP复合材料的拉伸强度和冲击强度。因此,可在PP中添加β-成核、PET纤维和PP-g-MAH制备高强高韧的复合材料。
[Abstract]:In order to improve the toughness of polypropylene (PP) and maintain the rigidity, the composites were prepared by adding 尾 -nucleating agent PET fiber and PP-gMAH to PP matrix. The crystalline structure and mechanical properties of the composites were studied. The results show that 伪 -crystal is mainly formed in% PP and 尾 -crystal is mainly formed when 尾 -nucleating agent is added, and it has high impact strength. The tensile properties of PP and 尾 -PP were improved by adding PET fiber. With the increase of PET fiber, the tensile strength of the composites increased gradually, but the impact strength and elongation at break decreased obviously. Relatively speaking, the impact strength of 尾 -PP composites is twice as high as that of PP composites, and the tensile strength and elastic modulus of 尾 -PP composites can be maintained at the same time. The tensile strength and impact strength of PP and 尾 -PP composites were increased by PP-g-MAH compatibilization. Therefore, 尾 -nucleated PET fiber and PP-g-MAH can be added to PP to prepare high strength and high toughness composites.
【作者单位】: 五邑大学纺织服装学院;
【基金】:广东省教育厅青年创新人才项目(2014KQNCX155) 五邑大学青年科研基金(2014zk15)
【分类号】:TB332
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