超支化含硅聚(亚芳基亚乙炔基)聚合物的合成研究  

Synthesis of Hyperbrandched Poly(Aryleneethynylene) Bearing Trimethylsilyl Side Substituents

作　　者：李书宏[1] 方雷[2] 王锐[2] 徐彩虹[2] 

机构地区：[1]北京工商大学理学院,北京100048 [2]中国科学院化学研究所,北京100190

出　　处：《有机硅材料》2015年第4期267-272,共6页Silicone Material

基　　金：国家自然科学基金(50673094;20774102)

摘　　要：由1,3,5-三碘苯与2,5-二(三甲基硅烷基)-1,4-二乙炔基苯通过Sonogashira交叉偶联反应合成了含有机硅侧基的超支化聚(亚芳基亚乙炔基)(PAEs)。研究表明,该聚合物为不溶于普通有机溶剂、平均粒径约500 nm且分布均匀的高分子微球。氮吸附实验结果表明,合成的含硅PAEs网络形成了既含微孔又含介孔的复杂的孔结构,且孔径分布不均匀,BET比表面积为389.5 m2/g;由于具有超支化的网络型结构,聚合物体现了良好的热稳定性,氮气气氛下,质量损失率为5%时的失重温度为500℃,1 000℃时仍有接近80%的残余质量分数;聚合物在365 nm激发波长下发蓝光,其最大荧光发射波长为469 nm。Hyperbranched poly（aryleneethynylene） bearing trimethylsilyl side substituents （PAEs） were synthesized by Sonogashira cross-coupling reaction between 1,3,5-triiodobenzene and 2,5-bis（ trimethylsilyl）-1 ,4-diethynyl benzene .Research showed that the polymer microspheres insoluble in common organic solvents and have an average particle size of 500 nm with an even distribution .Nitrogen adsorption experiment showed that the silicon containing PAEs network had both microporous and mesoporous complex pore structures with uneven distribution of pore diameter .BET specific surface area was 389.5 m2/g.Due to hyperbranched net-work, the polymer showed good thermal stability .When weight loss temperature is 500℃ with mass loss of 5%under nitrogen atmosphere , and there is still 80%of the residual mass fraction at 1000℃.The polymer e-mits blue light in 365 nm excitation with longest fluorescence emission at 469 nm.

关 键 词：聚(亚芳基亚乙炔基) 超支化聚合物 交叉偶联反应 比表面积 热性能 

分 类 号：O634.41[理学—高分子化学]