聚偶氮酯的合成及用于乳液聚合

<正> 偶氮二异丁腈(AIBN)与二元醇反应得到聚偶氮酯(polyazoester),进而可按自由基反应引发单体聚合制备嵌段共聚物,近年来国外已有研究,其所用单体多为1,6-己二醇等低分子二元醇。本实验选用AIBN和PEG 400,用Pinner合成法经改进后制得了聚偶氮酯,分析了该产物的结构和热分解动力学,并使之部分分解引发丙烯酰胺得到了兼具表面活性和引发活性的预聚物。结果表明,这种预聚物用于醋酸乙烯聚合、苯乙烯和

SYNTHESIS OF POLYAZOESTER AND ITS USE IN EMULSION POLYMERIZATION

Polyazoester has been obtained by the catalyzed polyreaction of azobisbutyronitrile with PEG 400 according to Pinner reaction. The structure and the kinetice of decomposition of the product were researched. The polyazoester was used to initiate radical polymerization of acrylamide limiting the decomposition of the initiator to 37%. By use of the resulting po-lyacrylamide as an emulsifying initiator system stable emulsions of polymers (polyvinylacetate, styrene-ethyl acrylate copolymer) were obtained without additional use of a tenside.