Synthesis of polyvinylamine by a modified Hofmann degradation of polyacrylamide and its solution properties

摘要：

Four poly(vinylamine) chlorides (PVAmHCl) with about 82% degree of amination were prepared by the Hofmann degradation of polyacrylamide (PAM) with different degrees of polymerization (DPn). The behavior of dilute aqueous solutions of PVAmHCl was compared by viscosimetric, conductometric and potentiometric measurements. Dilute aqueous solutions of PVAmHCl showed typical polyelectrolyte characteristics. All amino groups attached to the hydrocarbon main chain were protonated at pH~4. The m value of PVAmHCl increased from 5.13 to 5.58 and the pKa value decreased from 7.48 to 7.26 with the increase of the intrinsic viscosity of PVAmHCl from 2.7 to 5.7. Equivalent conductivity of PVAmHCl solution decreased with increasing concentration, and the higher the intrinsic viscosity of PVAmHCl, the higher the equivalent conductivity of the corresponding PVAmHCl.

关键词： Polyelectrolyte Solution properties Water-soluble polymer Polyvinylamine

作者: Bingtao Tang Shufen Zhang Zhiyong Hu Jinzong Yang

作者单位: State Key Lab. of Fine Chemicals, Dalian University of Technology, Dalian116012, China North University of China, Taiyuan 030051, China

会议类型: 国际会议

会议名称: The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)

会议地点: 大连

会议语种:英文

在线出版日期: 2008-08-04（万方平台首次上网日期，不代表论文的发表时间）