文献类型：期刊文献

中文题名：用可再生原料合成聚氨酯脲水分散液——成膜后的结构与性能研究

英文题名：POLYURETHANEUREA AQUEOUS DISPERSIONS BASED ON RENEWABLE MATERIALS ——THE MORPHOLOGY AND MECHANICAL PROPERTIES FO THE FILMS

作者：胡永生[1];陶勇[1];胡春圃[1]

机构：[1]华东理工大学材料科学与工程研究所,上海200237

年份：2001

卷号：11

期号：3

起止页码：306

中文期刊名：高分子学报

外文期刊名：Acta Polymerica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：蓖麻油;聚醚多元醇;聚氨酯脲;水分散液;形态;力学性能;膜结构;PUU膜

外文关键词：castor oil; polyether polyol; polyurethaneurea; aqueous dispersion; morphology; mechanical property

摘要：以不同组成的蓖麻油和二官能度聚醚多元醇 (GE 2 10 )等原料合成了聚氨酯脲 (PUU)水分散液 ,研究了蓖麻油 GE 2 10的组成对PUU膜结构与性能的影响 .结果表明 ,由GE 2 10合成的PUU虽软硬段间存在一定的相容性 ,但其中脲羰基的氢键化程度高 ,硬段形成较好的有序结构 ,导致PUU膜具有较高的拉伸强度及断裂伸长率 ,但弹性模量和硬度下降 .在蓖麻油合成的PUU中脲羰基的氢键化程度及硬段有序结构均受到化学交联结构的抑制 ,故PUU膜的拉伸强度和断裂伸长率降低 ,但弹性模量及硬度较高 .由蓖麻油与GE 2 10在一定的组成范围内合成的PUU膜 ,具有优良的综合平衡的力学性能 。
A series of polyurethaneurea (PUU) aqueous dispersions were synthesized from castor oil and difunctional poly(oxypropylene) polyol(GE-210, M-n = 1000),and the effect of castor oil/GE-210 composition on the morphologies and mechanical properties for these different PUU films was studied. The experimental results show that there was some compatibility between the hard segments and soft segments for the PUU based on GE-210,and the high degree of hydrogen-bonded urea carbonyl groups and the perfect ordered structure of hard segments observed for this kind of PUU resulted in higher tensile strength and elongation at break but lower elastic module and hardness of the film. For the PUU synthesized from castor oil, the degree of hydrogen-bonded urea carbonyl groups and the ordered structure of hard segments were suppressed by chemical crosslinking existing in the system, giving lower tensile strength and elongation at break but higher elastic module and hardness of the film, Furthermore, it is of interest to find that there were excellent comprehensive mechanical properties for the PUU films prepared with mixed polyols of castor oil and GE-210 in the composition range of around 50/50 (wt/wt),which can be correlated with their structures and morphologies.