• 文献标题:   Grafting multi-elements hybrid polymer brushes on graphene oxide for epoxy composite with excellent flame retardancy
  • 文献类型:   Article
  • 作  者:   ZHANG JT, WU WQ, LV Y, GUO CL, XU YT, ZENG BR, DAI LZ
  • 作者关键词:   graphene oxide, halogen #8208, free flame retardant, polymer brush, epoxy resin
  • 出版物名称:   JOURNAL OF APPLIED POLYMER SCIENCE
  • ISSN:   0021-8995 EI 1097-4628
  • 通讯作者地址:  
  • 被引频次:   6
  • DOI:   10.1002/app.50923 EA APR 2021
  • 出版年:   2021

▎ 摘  要

In this paper, a silicon-oxygen coupling agent (MPS) with a double bond is hydrolyzed with graphene oxide (GO) to obtain MPS-GO. The polymerization of MPS-GO with the phosphorus-containing monomer (HEPO) is initiated with 2,2 '-Azobis(2-methylpropionitrile) (AIBN) to obtain multi-elements hybrid polymer brushes grafting graphene oxide (HM-GO). As a flame retardant, different amounts of HM-GO are added to obtain EP composites. In this system, the properties of composite flame retardant obviously increase with the increasing of HM-GO. The limiting oxygen index (LOI) value of composites with 4 wt% addition of HM-GO is 31.0%, while the LOI value of EP-0 is only 23.9%. And the peak heat release rate (PHRR) value is reduced from 515.8 W g(-1) of pure epoxy resin to 376.9 W g(-1). In addition, with the increase of HM-GO addition, the T-g value, flexural strength and flexural modulus of EP composites are improved. Through calculation, it is proved that the rising of T-g was due to the increase of crosslink density of the system. The flame retardant performance and mechanical properties of the composite materials are steadily improved, indicating that such flame retardants are dispersed well in the epoxy resin. HM-GO is an efficient macromolecular modified graphene oxide halogen-free flame retardant, which can improve both flame retardant properties and mechanical properties.