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论文类型：期刊论文

发表时间：2015-01-28

发表刊物：JOURNAL OF POLYMER RESEARCH

收录刊物：SCIE、EI、Scopus

卷号：22

期号：2

ISSN号：1022-9760

关键字：Solution properties; Amphoteric macromolecular dye; Poly(acrylamide-co-vinylamine); Viscosity

摘要：Amphoteric macromolecular (AM) dyes with different degrees of substitution were synthesized by grafting a poly(acrylamide-co-vinylamine) oligomer with reactive dye. Solution properties of these AM dyes were measured as functions of pH, salt content, the degree of substitution, and concentration of AM dye solutions. The results of the potentiometric and conductometric titrations showed that the first transition at pH similar to 10.5 corresponds to the onset of protonation of primary amino groups of AM dyes. and the second transition at pH similar to 2.5 corresponds to the end of protonation of the primary amino groups. The results of the solubility behavior and zeta potential experiment exhibited that the AM dyes are precipitated near the isoelectric point, and the soluble pH region of the AM dyes can be controlled by changing the ratio of amino to sulfonate groups in these dyes. The viscosity behaviors exhibited that these AM dyes possessed low viscosity, only several mPa.s.