Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (12): 2789.doi: 10.7503/cjcu20120181

• Polymer Chemistry • Previous Articles     Next Articles

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

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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