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N-乙烯基吡咯烷酮(NVP)的水相溶液聚合体系中,用水溶性的过氧化氢作为聚合引发剂不易获得高分子量聚乙烯吡咯烷酮(PVP)。而用偶氮二异丁腈作引发剂时可得到分子量高的聚合物,但是,聚合反应不易控制,反应的重现性差。二者均在NVP水相溶液聚合制取高分子量PVP时都存在一定的缺点。 笔者提出一种水溶性的偶氮类化合物C-1作为NVP的水相溶液聚合的引发剂,在通常的聚合条件下可以方便地制得高分子量的聚乙
In the aqueous solution polymerization of N-vinylpyrrolidone (NVP), high molecular weight polyvinylpyrrolidone (PVP) is hardly obtained using water-soluble hydrogen peroxide as a polymerization initiator. When azobisisobutyronitrile is used as an initiator, a polymer with a high molecular weight can be obtained. However, the polymerization reaction is not easily controlled and the reproducibility of the reaction is poor. Both of them have some shortcomings in the polymerization of NVP aqueous solution to produce high molecular weight PVP. The author proposes a water-soluble azo compound C-1 as NVP aqueous solution polymerization initiator, under normal polymerization conditions can be easily prepared high molecular weight Polyethylene