WORD版本 . 水性聚氨酯的制备方法及应用毕业论文

目录 摘要 ·········································································· I Abstract ····································································· II

第一章 绪论 ··································································· 1 1.1 概述 ·································································· 1 1.2 国外概况 ······························································ 1 1.3 水性聚氨酯的分类 ······················································ 2 1.4 水性聚氨酯的制备方法 ·················································· 2 1.4.1 外乳化法 ························································· 2 1.4.2 自乳化法 ························································· 2 1.4.2.1 丙酮法 ····················································· 3 1.4.2.2 预聚体分散法 ··············································· 3 1.4.2.3 熔体分散缩合法 ············································· 3 1.4.2.4 酮亚胺—酮连氮法 ··········································· 3 1.4.2.5 封端-NCO基团法 ············································· 4 1.5 水性聚氨酯的改性 ······················································ 4 1.5.1 物理共混 ························································· 4 1.5.2 化学接枝共聚 ····················································· 4 1.5.2.1 环氧树脂改性 ··············································· 5 1.5.2.2 丙烯酸酯（PA）改性 ········································· 5 1.5.2.3 聚硅氧烷改性 ··············································· 6 1.5.2.4 蓖麻油改性 ················································· 6 1.5.2.5 其他改性方法 ··············································· 7 1.6 制备环氧树脂—丙烯酸酯改性水性聚氨酯乳液的物料 ························ 7 1.6.1 多异氰酸酯 ······················································· 7 1.6.2 多元醇 ··························································· 7 WORD版本 .

1.6.3 催化剂 ··························································· 7 1.6.4 亲水性扩链剂 ····················································· 7 1.6.5 交联剂 ··························································· 8 1.6.6 成盐剂 ··························································· 8 1.6.7 扩链剂 ··························································· 8 1.6.8 溶剂 ····························································· 8 1.6.9 水 ······························································· 8 1.6.10 改性剂 ·························································· 9 1.6.10.1 环氧树脂 ·················································· 9 1.6.10.2 乙烯基单体 ················································ 9 1.6.11 引发剂 ·························································· 9 1.7 水性聚氨酯涂料的应用 ·················································· 9 1.8 本课题的研究意义 ····················································· 10 第二章 实验部分 ······························································ 11 2.1 实验原料 ····························································· 11 2.2 实验设备、仪器及其他材料 ············································· 12 2.3 实验装置图 ··························································· 14 2.4 环氧树脂—丙烯酸酯改性水性聚氨酯乳液的制备 ··························· 14 2.5 反应原理 ····························································· 14 2.5.1 水性聚氨酯的合成原理 ············································ 14 2.5.2 环氧树脂改性原理 ················································ 16 2.5.3 丙烯酸酯改性原理 ················································ 16 2.5.3.1 链引发 ···················································· 16 2.5.3.2 链增长 ···················································· 16 2.5.3.3 链终止 ···················································· 16 2.5.3.4 链转移 ···················································· 17 2.6 分析测试 ····························································· 17 2.6.1 异氰酸根基团的测定 ·············································· 17 2.6.1.1 2 mol/L 二正丁胺溶液的配制 ······························· 17 2.6.1.2 0.5 mol/L 盐酸标准溶液的配制 ····························· 17 2.6.1.3 测定步骤 ·················································· 17 2.6.1.4 测定原理 ·················································· 17 2.6.1.5 计算公式 ·················································· 17 2.6.2 酸值的测定 ······················································ 18 2.6.2.1 测定试剂的配制 ············································ 18 2.6.2.2 测定步骤 ·················································· 18