阻燃剂
材料科学
聚丙烯
复合材料
炭化
烧焦
极限抗拉强度
聚合物
环境友好型
火焰试验
石墨
热塑性塑料
化学工程
热解
工程类
生物
生态学
作者
Na Wang,Shaopeng Chen,Lingtong Li,Zhan Bai,Jianbing Guo,Jun Qin,Xiaolang Chen,Rui Zhao,Kun Zhang,Hong Wu
标识
DOI:10.1021/acs.jpcc.0c11139
摘要
A facile method to fabricate nanohybrid flame retardants has become increasingly important to enhance the flame-retardant efficiency and adhesion in interfaces between polymer matrix and the flame retardants. Polypropylene (PP) is a vital thermoplastic polymer family member; however, its flame retardancy remains a big challenge because of its other seriously deteriorated properties. In this present work, an environmentally friendly nanohybrid expandable graphite (nHEG) has been successfully designed and synthesized in situ via a one-pot strategy of the first flame-retardant PP by introducing nano-SiO2 particles into the surface and interlamination of graphite lamellas. The performance of PP composites is modulated through regulating nHEG content and nano-SiO2 distribution as the catalytic charring agent, and expandable graphite (EG) is used to be the flame-retardant unit in the synthesis process. PP composites obtain the UL-94 V0 rating by the UL-94 test. The enhanced flame retardancy can be attributable to the formation of continuous and tight char residues. The sample with the highest flame retardancy maintains a tensile strength of 32.7 MPa and 9.3 kJ/m2 of notched impact strength, respectively. Therefore, the nanohybrid flame-retardant PP composites show extensive applications.
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