高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (12): 2789.doi: 10.7503/cjcu20120181

• 高分子化学 • 上一篇    下一篇

滑石粉及混炼顺序对PA6/PP/MAPP合金相形态及力学性能的影响

王力, 凌学良, 郭朝霞, 于建   

  1. 清华大学化学工程系, 教育部先进材料重点实验室, 北京 100084
  • 收稿日期:2012-03-05 出版日期:2012-12-10 发布日期:2012-11-20
  • 通讯作者: 于建,男,教授,主要从事高分子复合材料研究.E-mail:yuj@mail.tsinghua.edu.cn E-mail:yuj@mail.tsinghua.edu.cn

Effects of Talcum Powder(Talc) and Compounding Sequence on the Morphology and Mechanical Properties of PA6/PP/MAPP Blend

WANG Li, LING Xue-Liang, GUO Zhao-Xia, YU Jian   

  1. Key Laboratory of Advanced Materials(Ministry of Education), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2012-03-05 Online:2012-12-10 Published:2012-11-20

PDF (PC)

被引次数

13

摘要：

通过挤出和注射成型制备了滑石粉(Talc)填充的尼龙6/聚丙烯/马来酸酐接枝聚丙烯(PA6/PP/MAPP)合金, 研究了Talc和混炼顺序(一步法和PA6母料法)对合金相形态和力学性能的影响. 场发射扫描电镜(FESEM)分析结果表明, 添加Talc后注射样条中心部分的PP相由球状转变为沿流动方向取向的有分支的条状结构, 且用PA6母料法制样比用一步法制样的相形态更为精细. 溶解PA6相后对PP相进行热重分析(TGA), 确定了Talc在PA6相和PP相中的分布比例, Talc选择性分布于PA6相中. PA6母料法中Talc的分散好于一步法. 研究了材料的拉伸、 弯曲、 冲击、 热变形温度和动态力学性能, Talc的添加能够明显提高材料的刚性, 且母料法样品的性能优于一步法样品.

关键词: 滑石粉, 相形态, 尼龙6, 聚丙烯, 力学性能

Abstract:

Talcum Powder(Talc) filled polyamide 6(PA6)/polypropylene(PP)/maleic anhydride grafted polypropylene(MAPP) blends were prepared by extrusion and subsequent injection molding. Effects of Talc and compounding sequence(one-step compounding and PA6 masterbatch method) on the morphology and mechanical properties of PA6/PP/MAPP blends were investigated. Field emission scanning microscopy shows that branched fibrils of PP phase oriented along the injection flow direction are formed in the core of specimen for Talc filled blends, instead of spherical dispersed PP domains for unfilled blend. And the sample prepared by masterbatch approach possesses finer morphology than the sample prepared by one-step compounding. The distribution of Talc in PA6 and PP phases was determined by selectively dissolving PA6 phase and thermogravimetric analysis of PP phase. Talc is selectively distributed in PA6 phase. The masterbatch method yields better dispersion state of Talc than the one-step compounding method. The tensile property, flexural property, impact property, heat distortion temperature and dynamic mechanical property of the materials were tested. The addition of Talc can greatly increase the flexural modulus, heat distortion temperature and dynamic storage modulus of PA6/PP/MAPP blend and the sample prepared by masterbatch approach outperforms the sample prepared by one-step compounding.

Key words: Talcum powder(Talc), Morphology, Polyamide 6, Polypropylene, Mechanical property

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