乙烯基聚硅氧烷包覆改性聚磷酸铵及其在环氧树脂中的阻燃应用  

Vinyl Polysiloxane Surface-modified Ammonium Polyphosphate and Its Application in Epoxy Resin as Flame Retardants

作　　者：刘晓威[1] 武伟红[2] 武翠翠[1] 屈红强[1] 徐建中[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002 [2]河北农业大学理学院,河北保定071000

出　　处：《中国塑料》2014年第3期59-64,共6页China Plastics

摘　　要：以正硅酸乙酯(TEOS)与乙烯基三乙氧基硅烷(VTOS)为前驱物,采用溶胶-凝胶工艺将乙烯基引入聚磷酸铵(APP)的表面,以期对APP进行二次接枝改性。对VTOS改性APP(VMAPP)进行了研究,并研究了其对环氧树脂(EP)阻燃性能的影响。结果表明,包覆膜材料中存在乙烯基;经含有乙烯基的聚硅氧烷对APP进行包覆改性后,在APP表面生成一层致密的保护膜,表面P、N元素含量明显降低,C元素含量明显增加,出现Si元素的吸收峰;VMAPP的疏水性及耐水性均得到改善;VMAPP能够促使EP生成更为致密和稳定的炭层,促进EP阻燃性能的改善。Ammonium polyphosphate （APP） was treated with tetraethoxysilane （TEOS） and vinyltriethoxysilane（VTOS） by a sol-gel method leading to vinyl modified APP（VMAPP）, which was introduced into an epoxy resin（EP）. The surface vinyl groups could be used as reaction sites for further modification. Fourier transform infrared spectrum （FTIR） analysis confirmed the presence of the vinyl in the epoxy coating film. A dense protective film was present on the surface of APP. On the film, the content of P, N elements was significantly decreased, and the content of C element increased significantly. The water resistance of VMAPP was better than unmodified APP. Si element present on the surface of APP was synergized with APP to generate more compact and stable char layer and thus promoted the flame retardant performance of EP.

关 键 词：环氧树脂 聚硅氧烷 聚磷酸铵 阻燃 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]