胺对He-Ne激光诱导亚甲蓝增感丙烯酰胺聚合的影响

Influences of Amines on Methylene Blue Sensitized Polymerization of Acrylamide Induced by He-Ne Laser

本文以He-Ne激光诱导,在亚甲蓝-胺增感体系的存在下,对丙烯酰胺水溶液的聚合反应进行了研究,测定了亚甲蓝的光褪色速率、光褪色量子产率、聚合速率、聚合速率常数、单体消耗量子产率、聚合物生成量子产率、聚合物分子量和链转移常数。这些参数与胺的结构相关。胺在光诱导过程中形成的自由基不仅能够引发链反应,且在聚合过程中还起着链转移剂的作用。

The polymerization of acrylamide aqueous solution induced by He-Ne laser in the presence of methyl blue(MB)-amines as the sensitizing system has been investiga-ted.The photofading rate and photofading quantum yield of MB,the polymeriza-tion rate and rate constants,the quantum yield for monomer consumption and po-lymer formation,molecular weights of polymers,and chain transfer constants have been measured.These parameters are related to the amine structures.In pho-toinduced process,the radicals generated from amine molecules not only act as initiators for the chain polymerization,but also as chain transfer agents in the polymerization.