聚氨酯脲-乙烯基聚合物复合水分散液

Polyurethaneurea-vinyl polymer hybrid aqueous dispersions

以蓖麻油、二官能度聚醚多元醇（ＧＥ ２１０）、苯乙烯和丙烯酸丁酯等原料合成了聚氨酯脲－乙烯基聚合物（ＰＵＡ）复合水分散液，并研究了这类水分散体系的粒子形态、流变性能以及稳定性。结果表明，分别由蓖麻油以及蓖麻油与ＧＥ ２１０质量比为１／ｌ合成的ＰＵＡ分散液中的分散相呈现出较好的核壳结构，分散液的粘度较小，接近于牛顿流体，且体系的电位绝对值和临界聚沉浓度较大。由ＧＥ ２１０合成的ＰＵＡ复合水分散液中未观察到规则的分散粒子，分散液的粘度较大，表现为假塑性流体，且对电解质较敏感。

A series of polyurethaneurea-vinyl polymer (PUA) hybrid aqueous dispersions were synthesized from castor oil, and/or difunctional poly (oxypropylene) polyol (GE 210, M over-bar n = 1 000), as well as butyl acrylate and styrene, and the particle morphologies, rheologies and stabilities for these PUAs were examined and studied. The experimental results showed that there were clear core-shell particle morphologies for the PUA prepared with castor oil and the mixed polyols of castor oil and GE 210 (1/1 in mass ratio) respectively. Besides higher ζ potentials and critical coagulation concentrations, lower viscosities and an approximate Newton fluid behaviors were observed for these two PUA systems. For the PUA synthesized from GE 210, no ordered particles were observed in the system, and this dispersion was characterized as a pseudoplastic fluid with higher viscosity. In addition, such a PUA system was sensitive to electrolyte.