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本文研究了在碱性介质中,氮气氛下 N-乙烯基吡咯烷酮(N-VP)在嵌段聚醚聚氨酯(SPEU)膜上的接枝聚合。测定了接枝率与接枝液中 N-VP单体浓度、光照时间、催化剂浓度等条件的关系。测定了接枝后 SPEU 膜的吸水性,并用扫描电镜对膜表面进行了观察。对碱性介质中的接枝机理进行了初步探讨。
In this paper, we studied the graft polymerization of N-vinyl pyrrolidone (N-VP) onto the block polyether polyurethane (SPEU) membrane in alkaline medium under nitrogen atmosphere. The relationship between the graft ratio and the concentration of N-VP monomer in the graft solution, the irradiation time and the concentration of the catalyst were determined. The water absorption of the SPEU membrane was measured and the surface of the membrane was observed with scanning electron microscopy. The basic principle of grafting in alkaline medium is discussed.