Affiliation:
1. College of Materials Science & Engineering, Lanzhou University of Technology, Lanzhou, China
2. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, China
Abstract
Sb2O3 nanoparticles (nano-Sb2O3), montmorillonite (MMT) and brominated polystyrene (BPS) were used to enhance flame retardancy of polypropylene (PP) in the work, in which nano-Sb2O3 was modified by cetyl trimethyl ammonium bromide and polyethylene glycol and MMT was modified by silane coupling agent. PP matrix flame retardant composites were prepared by melt blending after pre-mixing by high energy ball milling technique. Then, the flame retardancy, thermal stability behaviour, crystallization performance and tensile strength of PP matrix composites (nano-Sb2O3/MMT/BPS-PP, nano-Sb2O3/BPS-PP) were investigated. The results show that MMT can significantly improve the thermal stability and flame retardancy of PP matrix due to improving the strength of char layer and forming barrier effect. Compared with 3.5%nano-Sb2O3/8%BPS-PP composites, the limiting oxygen index of 3.5%nano-Sb2O3/3%MMT/8%BPS-PP composites was increased from 26.9% to 29.0% and its UL94 grade was achieved to V-0 level. Moreover, MMT and nano-Sb2O3 can increase the crystallinity and tensile strength of PP matrix composites because of the heterogeneous nucleation effect of MMT and nano-Sb2O3 particles on the crystallization of PP matrix.
Funder
National Natural Science Foundation of China
Subject
Materials Chemistry,Polymers and Plastics,Ceramics and Composites
Cited by
1 articles.
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