Synergistic effect of montmorillonite and nano-Sb2O3/brominated polystyrene on the flame retardancy of polypropylene matrix composites

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...

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Bibliographic Details
Published in:Polymers & polymer composites 2022-03, Vol.30
Main Authors: Xu, Jianlin, Liu, Xiaoqi, Ren, Shibo, Kang, Chenghu, Niu, Lei
Format: Article
Language:English
Subjects:
Antimony trioxide
Ball milling
Bromination
Cetyltrimethylammonium bromide
Composite materials
Coupling agents
Crystallization
Efficiency
Flame retardants
Melt blending
Montmorillonite
Nanoparticles
Nucleation
Particle size
Polyethylene glycol
Polymers
Polypropylene
Polystyrene resins
Synergistic effect
Temperature
Tensile strength
Textiles
Thermal stability
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Summary: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.
ISSN:0967-3911
1478-2391
DOI:10.1177/09673911221083769