有机硅改性水性聚氨酯合成及其性能研究

论文编号:HG085  论文字数:8216,页数:21

摘要：本论文研究了以异氰酸酯、聚醚多元醇、2，2-二羟甲基丙酸、有机硅为主要原料，经预聚、扩链、有机硅改性，合成了一系列水性聚氨酯乳液，并用红外光谱进行结构表征，讨论了有机硅用量对乳液表面张力的影响;不同异氰酸酯、聚醚多元醇对乳液稳定性的影响;亲水基用量对乳液外观、黏度、稳定性及成膜以后力学性能的影响；以及扩链剂、交联剂用量对膜力学性能的影响等。结果表明，合适的交联剂和扩链剂用量所制得的乳液在一定温度下制成的膜的力学性能有很大的提高，有机硅材料改性对聚氨酯薄膜的力学性能也有很大提高。
关键词：有机硅；改性；水性聚氨酯；乳液；力学性能
 
  
Synthesis and Properties of Waterborne Polyurethane Modified with Organic Silicon
Abstract: In this paper, a series of waterborne polyurethane (WPU) were prepared by reaction of diisocyanate, polyether polyols, 2，2 - dimethylol propionic acid and organic Silicon through prepoling, chain-extending, modifing with Organic Silicone. The structure of the emulsion was characterized with infrared spectra. Impact on emulsion surface tension of the Organic Silicon consumption; the emulsion stability for different isocyanate, polyether polyols; hydrophilic amount on appearance, viscosity , stability and mechanical properties after becoming membrane; and the chain extender, the initiator of the mechanical properties of membranes impact were discussed. The results showed that, suitable cross linker and chain extender used in the emulsion system which membraned under certain temperature made the mechanical properties greatly improved, Organic Silicon material modified also improve a lot to polyurethane mechanics performance of membrane.
 Keywords：Organic Silicon; Modify; Waterborne Polyurethane; Emulsion; Mechanical Properties

目  录
中文摘要 I
英文摘要 II
目  录 III
1.前言 1
2.实验部分 4
2.1主要化学试剂、原料 4
2.2主要的仪器设备 5
2.3合成工艺流程 5
2.4实验装置 6
2.5性能测试 6
3结果与讨论 9
3.1合成反应式示意图、原理 9
3.2产品结构表征 10
3.3亲水基含量对乳液稳定性的影响 11
3.4不同异氰酸酯对乳液稳定性的影响 12
3.5有机硅改性对聚氨酯乳液粒径大小及其分布的影响 13
3.6扩链剂含量对膜力学性能的影响 13
3.7交联剂含量对膜力学性能的影响 15
4.结论 16
致谢 17
参考文献 18