| 可逆聚氨酯乳液的制备与研究 |
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| 引用本文： | 王惟,夏修旸,郑建伟,汤嘉陵. 可逆聚氨酯乳液的制备与研究[J]. 高分子材料科学与工程, 2007, 23(2): 111-115 |
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| 作者姓名： | 王惟 夏修旸 郑建伟 汤嘉陵 |
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| 作者单位： | 四川大学,高分子科学与工程学院,四川,成都,610065;四川大学,高分子科学与工程学院,四川,成都,610065;四川大学,高分子科学与工程学院,四川,成都,610065;四川大学,高分子科学与工程学院,四川,成都,610065 |
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| 摘 要： | 以甲苯二异氰酸酯与二官能度及三官能度的聚氧化丙烯二醇为原料,合成了乳胶粒子内分子结构分别为线型及三维网状的聚氨酯乳液,将两种乳液室温干燥成膜后,在搅拌下再进行分散乳化,通过丁达尔现象及透射电镜结果表明:前者不能通过二次分散乳化得到乳液;后者可以通过二次分散乳化再次得到乳液,成功制备了可逆聚氨酯乳液。并对这种乳液成膜及再分散乳化的机理(可逆机理)进行了初步研究。
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| 关 键 词： | 聚氨酯 可逆乳液 成膜机理 |
| 文章编号： | 1000-7555（2007）02-0111-05 |
| 修稿时间： | 2006-08-24 |
Study on the Preparation and Reversible Mechanism of Reversible Polyurethanes Emulsion |
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| WANG Wei,XIA Xiu-yang,ZHENG Jian-wei,TANG Jia-ling. Study on the Preparation and Reversible Mechanism of Reversible Polyurethanes Emulsion[J]. Polymer Materials Science & Engineering, 2007, 23(2): 111-115 |
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| Authors: | WANG Wei XIA Xiu-yang ZHENG Jian-wei TANG Jia-ling |
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| Abstract: | Two types of polyurethanes emulsions were prepared in this article.The emulsion particles with linear molecular structure was prepared from TDI and bifunctional polypropylene glycol,while the emulsion particles with three-dimensional network molecular structure was prepared from TDI and trifunctional polypropylene glycol.After drying at room temperature,the obtained films of two types of emulsions were reemulsified by stirring.According to the Tyndall phenomenon and TEM results,it could be found that the polyurethane emulsion with emulsion particles,which have three-dimensional network molecular structure,formed emulsion again through reemulsification while the other type didn't.Thus,reversible polyurethane emulsion was obtained.The film-formation and reemulsification mechanism(reversible mechanism) was preliminary studied. |
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| Keywords: | polyurethanes reversible emulsion film-formation mechanism |
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