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Simultaneously improving the mechanical properties and flame retardancy of polypropylene using functionalized carbon nanotubes by covalently wrapping flame retardants followed by linking polypropylene

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Simultaneously improving the mechanical properties and flame retardancy of polypropylene using functionalized carbon nanotubes by covalently wrapping flame retardants followed by linking polypropylene

Content Provider	Royal Society of Chemistry (RSC)
Author	Yang, Hongfan Gong, Jiang Wen, Xin Li, Minggang Jiang, Zhiwei Tang, Tao Tian, Nana Chen, Hao Ye, Lin
Copyright Year	2017
Abstract	The fabrication of polymer nanocomposites with improved physical and chemical properties is a hot topic in the fields of materials and chemistry. In this work, carbon nanotubes (CNTs) are functionalized through flame retardant wrapping and maleic anhydride polypropylene (PPMA) covalently attaching to achieve a compact char layer and strong interfacial adhesion. The resultant polypropylene (PP)/functionalized CNT (FCNT) composites show remarkably improved flame retardancy and mechanical properties. For example, with the incorporation of FCNTs, the mechanical properties of PP are largely improved, meanwhile the ductility is maintained. This is thanks to the strong interfacial adhesion between FCNTs and the PP matrix. In contrast, the elongation at break of the PP/CNT composites decreases seriously. More importantly, the flame retardancy of the PP/FCNT composites is much better than that of PP and the PP/CNT composites. The improved flame retardancy results from the fact that the flame retardant wrapping forms a char layer on the surface of the CNTs, which protects the CNTs from being destroyed during combustion. As a result, the quality of the residual char is improved. The flammability of the PP composites is strongly dependent on the residual char of the CNTs. The compact and continuous residual char of the FCNTs not only acts as the shield for heat transfer, but also hinders the migration of volatile decomposition products out of PP and the diffusion of oxygen into PP.
Starting Page	716
Ending Page	726
Page Count	11
File Format	HTM / HTML PDF
ISSN	20521529
Volume Number	1
Issue Number	4
Journal	Materials Chemistry Frontiers
DOI	10.1039/c6qm00172f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Oxygen Ductility Flame retardant Polymer Composite material Maleic anhydride Carbon nanotube PPMA Organic chemistry Polypropylene Char Diffusion Heat transfer Hot Topic
Content Type	Text
Resource Type	Article

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