聚氨酯脲-乙烯基聚合物复合水分散液

胡永生　 陶勇　 胡春圃　

摘　要：以蓖麻油、二官能度聚醚多元醇(GE210)、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GE210质量比为1/1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ζ电位绝对值和临界聚沉浓度较大。由GE210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。
关键词：蓖麻油；聚醚多元醇；聚氨酯脲；乙烯基聚合物；复合水分散液；粒子形态；流变性能；稳定性
分类号：TQ331.4⁺99　文献标识码：B
文章编号：1000-1255(2001)02-0099-04

Polyurethaneurea-vinyl polymer hybrid aqueous dispersions

Hu Yongsheng（Institute of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237,China）　
Tao Yong（Institute of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237,China）　
Hu Chunpu（Institute of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237,China）　

Abstract：A series of polyurethaneurea- vinyl polymer (PUA) hybrid aqueous dispersions were synthesized from castor oil, and/or difunctional poly(oxypropylene) polyol (GE 210, Mn=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.
Keywords：castor oil;polyether polyol; polyurethaneurea;vinyl polymer;hybrid aqueous dispersion;particle morphology;rheology property;stability

参考文献：

［1］Xiao H, Xiao H X, Frisch K C, et al. Polyurethane-urea anionomer dispersions Ⅱ .[J]. J Macromol Sci-Pure Appl Chem, 1995, A32(2): 169～ 177
［2］Kim B K, Lee J C. Polyurethane ionomer dispersions from poly(neopentylene phthalate) glycol and isophorone diisocyanate[J]. Polymer, 1996, 37(3): 469～ 475
［3］Bao H, Zhang Z P, Ying S K. Effect of ionic group on the behaviour of polyurethaneurea emulsion[J]. Polymer, 1996, 37(13): 2 751～ 2 754
［4］徐强,景浩,胡春圃，等.聚氨酯脲-丙烯酸酯水分散液的粒径及形态研究[J].功能高分子学报,1999,12(4):405～408
［5］胡春圃,胡永生,陶勇.植物油基多元醇制备聚氨酯-乙烯基聚合物复合水分散液[P].中国，中国专利，991113871.6
［6］包华,王世荣,张志平,等.聚氨酯乳的ζ电位用其稳定性[J].聚氨酯工业,1996(4):16～18
［7］Han C D. Rheology in polymer processing[M]. New York: Academic Press, 1976. 89～ 128
［8］葛爱兰,冉全印,张志平.自乳化型聚氨酯水乳液的合成及性能研究[J].高分子材料科学与工程,1993(6):24～28
［9］周庆业,李涵,张邦华,等.聚氨酯乳液的合成及流变性能[J].物理化学学报,1996,12(8):751～754
［10］马德柱,何平笙,徐种德,等.高聚物的结构与性能[M].第2版.北京:科学出版社,1999.318～352
［11］Kim B K,Kim T K.Aqueous dispersion of polyurethane from H12MDI,PTAd/PPG,and DMPA:particle size of dispersion and physical properties of emulsion cast films[J].J Appl Polym Sci,1991,43(2):393～402
［12］傅献彩,沈文霞,姚天扬.物理化学[M].第4版.北京:高等教育出版社,1991.987～1 082
［13］曹同玉,刘庆普,胡金生.聚合物乳液合成原理性能及应用[M].北京:化学出版社,1997.468～484
［14］Lovell P A, El-Aasser Ed. Emulsion polymerization and emulsion polymers[M]. Chichester: John Wily ＆ Sons Ltd, 1997. 59～ 121

收稿日期：2000年7月10日

修稿日期：2000年10月16日

出版日期：2001年3月1日