耐溶剂型水性聚氨酯的合成及其性能研究_化学工程与工艺-免费论文网

耐溶剂型水性聚氨酯的合成及其性能研究

论文编号:HG203 论文字数:9592,页数:25

摘要：本论文研究了以甲苯二异氰酸酯、聚醚二元醇、有机硅等为主要原料，通过预聚、扩链、改性、引入亲水基、中和、乳化等过程制备有机硅改性水性聚氨酯乳液。通过测定乳液的粘度、表面张力、稳定性，膜的耐水、甲苯、四氢呋喃等溶剂性能，及膜的耐洗性能，并与进口同类产品进行比较，得出交联剂、有机硅的引入可明显提高膜的耐热性能、耐水性能、耐甲苯及四氢呋喃性能。进口同类产品的膜耐水性较好、耐甲苯性较差。
关键词：水性聚氨酯；有机硅；耐溶剂性能；合成；性能分析

Abstract: A polyurethane (PU) emulsion which was based on toluene diisocyanate (TDI), polyethepolyols, and organic silicon as the main raw material, through prepolyming, extending, modifying, introducing hydrophilic group, neutralizing, and emulsifying process, was prepared. By measuring the emulsion viscosity, surface tension, stability performance in solvent such as water, toluene, and tetrahydrofuran, wash-resistant performance of the membrane, and comparing with the similar imported products, we drew the conclusions that the introduction of silicone can significantly improve the membrane’s heat endurance, wash resistance, stability performance of toluene and tetrahydrofuran compared with similar imported products.

Keywords: Waterborne polyurethane; Silicone; Properties; Synthesis; Performance analysis

中文摘要

英文摘要

目录 III
1. 绪论 1
2．实验部分 3
2.1主要仪器、设备 3
2.2主要原料、试剂 4
2.3合成工艺 5
2.4产品性能分析 6
2.4.1 乳液黏度测定 6
2.4.2 乳液表面张力测定 6
2.4.3乳液稳定性测定 6
2.4.4制膜 7
2.4.5 膜耐水性能测定 7
2.4.6 膜耐甲苯性能测定 7
2.4.7 膜耐四氢呋喃性能测定 7
2.4.8 膜耐洗性能测定 8
3．结果与讨论 9
3.1合成反应式示意图、原理 9
3.2 有机硅用量对产品性能的影响 11
3.2.1 n(NCO)/n(OH)的比值对乳液稳定性的影响 11
3.2.2 有机硅用量对乳液表面张力的影响 11
3.3 有机硅含量对膜耐溶剂性能的影响 12
3.4 交联剂类型及用量对产品性能的影响 13
3.5 自制产品与进口样品耐溶剂性能比较 15
3.6 自制产品与进口样品耐洗性能比较 19
4. 结论 20
致谢 21
参考文献 22