前体法制备单分散遥爪聚乙炔

合成了苯基乙烯基亚砜 (PVSO) ,并以萘 碱金属作为引发剂、丁二酸酐作为终止剂 ,进行阴离子聚合 ,制备出单分散、端羧酸盐的苯基乙烯基亚砜的遥爪聚合物 ,聚合物的功能度基本在 1 6 0以上 .在真空加热条件下 ,聚苯基乙烯基亚砜发生侧基热消除反应 ,从而获得末端为羧酸盐的遥爪聚乙炔

SYNTHESIS OF MONODISPERSED TELECHELIC POLYACETYLENE FROM ITS PRECURSOR

With 1,2\|dibromoethane and thiophenol as two initial chemicals, phenyl vinyl sulfoxide(PVSO) was synthesized through substitution of thiophenol,elimination of phenyl 2\|bromoethyl sulfide and partial oxidation of phenyl vinyl sulfide.The anionic polymerizations of PVSO were carried out with different naphthalene\|alkaline metal initiators in THF at -78℃ under inert atomosphere.With succinic anhydride as the terminator,monodispersed telechelic polymers of PPVSO with different molecular weight were obtained.The functionality of PPVSO was determined by the methods of FTIR and titration and its value is more than 1 60. The thermal elimination of PPVSO under vacuum resulted in monodispersed telechelic polyacetylene with metal alkaline carboxylate as end groups.PPVSO was converted to poly(phenyl vinyl sulfone) by further oxidation.