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Surface modification of magnesium hydroxide and its application in flame retardant polypropylene composites

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Abstract

In this article, titanate and zinc stearate modified superfine magnesium hydroxide [Mg(OH)2] was filled into polypropylene (PP) as a flame retardant (FR). The structure and morphologies of untreated and treated Mg(OH)2 particles were characterized by Fourier transform infrared (FTIR), wide-angle X-ray diffraction (WAXD), and scanning electron microscope (SEM). PP/Mg(OH)2 (1:1) composites were also prepared in co-rotating twin-screw extruder, and the effects of treatment agents on the rheological behavior, mechanical properties, and flame retardancy of PP/Mg(OH)2 composites were studied. The results from FTIR and WAXD show that treatment agents are adsorbed onto the surface of Mg(OH)2 particles. The complex viscosity (η*) values of the composites decrease with the addition of various treatment agents. Surface treatment agent could significantly improve tensile and impact strength of PP/Mg(OH)2 composites due to its enhanced interfacial adhesion between Mg(OH)2 particles and the PP matrix. According to limiting oxygen index (LOI), titanate treated magnesium hydroxide (MH) greatly enhanced flame retardancy of PP/Mg(OH)2 composites.

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Acknowledgements

The authors are grateful to Science and Technology Foundation of Guizhou province [(2008)7001], Hope Stars Foundation of Southwest Jiaotong University (2008-12), National 863 Project Foundation of China (2003AA32X230), and National Science and Technology Supporting Project Foundation of China (2007BAB08B05) for financial supports of this work.

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Authors and Affiliations

  1. Key Laboratory of Advanced Materials Technology Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Xiaolang Chen

  2. National Engineering Research Center for Compounding and Modification of Polymer Materials, Materials Eng and Tech Innovation Center of Guizhou, Guiyang, 550014, China

    Xiaolang Chen, Jie Yu, Shengjun Lu, Zhu Luo & Min He

  3. The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China

    Shaoyun Guo

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  1. Xiaolang Chen
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  2. Jie Yu
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  3. Shaoyun Guo
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Correspondence to Xiaolang Chen.

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Chen, X., Yu, J., Guo, S. et al. Surface modification of magnesium hydroxide and its application in flame retardant polypropylene composites. J Mater Sci 44, 1324–1332 (2009). https://doi.org/10.1007/s10853-009-3273-6

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