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摘要本文对30%阳离子度P(DAC-AM)的制备工艺进行了初步优化探索。以丙烯酰氧乙基三甲基氯化铵（DAC）和丙烯酰胺（AM）为原料，过硫酸铵-亚硫酸氢钠（APS-RH）为复合引发剂，采用一次加料引发，两步升温的方法，通过水溶液聚合，单因素法考察了单体起始含量、引发剂含量、Na4EDTA含量、反应温度和熟化温度等因素对产物特征黏度值的影响规律。实验结果表明：单体起始含量34%，引发剂含量0.1%，Na4EDTA含量0.02%，反应温度40℃，熟化温度65℃。在此工艺条件下，可得到较佳特征黏度值为21.48dL/g，转化率为85.57%的30%阳离子度P(DAC-AM)胶体产物。已超过目前文献报道的30%阳离子度P(DAC-AM)的特征黏度最高值。26709
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关键词 丙烯酰氧乙基三甲基氯化铵 丙烯酰胺 共聚 水溶液聚合 特征黏度
毕业论文设计说明书外文摘要
Title Preliminary study on synthesis of 30% cationic polyacrylamide P(DAC-AM) in redox system
Abstract
The preparation process of 30% cationic polyacrylamide P(DAC-AM) was preliminary investigated. Using acryloyloxyethyl trimethyl ammonium chloride (DAC) and acrylamide (AM) as the raw materials, ammonium persulfate - sodium bisulfite (APS-RH) as the composite initiator, adopting the method of initiating in one shot and two-step raising temperature, through the aqueous solution polymerization, the effects of the original monomer content, initiator content, Na4EDTA content, reaction temperature and maturation temperature on the intrinsic viscosity value were investigated by the single factor method. The experimental result showed that the original monomer content was 34%, the initiator content was 0.1%, the Na4EDTA content was 0.02%, the reaction temperature was 40℃, and the maturation temperature was 65℃. The colloidal product of 30% cationic polyacrylamide P(DAC-AM) with the better intrinsic viscosity value of 21.48dL/g and conversion value of 85.57% was obtained under this process condition. The result had exceeded the highest intrinsic viscosity value of 30% cationic polyacrylamide P(DAC-AM) reported in the existing literature.
Keywords Acryloyloxyethyl trimethyl ammonium chloride; acrylamide; copolymerization; aqueous solution polymerization; intrinsic viscosity
目 次
1 引言 1
1.1 概述 1
1.2 国内外研究现状 1
1.3 存在问题及研究内容与目标 3
2 实验原理 4
2.1 DAC和AM共聚自由基共聚理论 4
2.2 影响P(DAC-AM)相对分子质量的因素 4
3方案设计与结果评价 6
3.1 设计思路 6
3.2 结果评价 7
4.实验部分 8
4.1 实验仪器和药剂 8
4.2 实验基本操作步骤 9
5.实验结果 10
5.1 单体起始含量的影响 10
5.2 引发剂含量的影响 11
5.3 Na4EDTA含量的影响 12
5.4 聚合反应温度的影响 13
5.5 聚合熟化温度的影响 14
5.6 凝胶渗透色谱表征 15
结 论 16
致 谢 17
参考文献18
附录 20
1 引言
1.1 概述
丙烯酰氧乙基三甲基氯化铵（Acryloyloxyethyltrimethyl ammonium chloride，简称DAC，分子式C8H16ClNO2）为丙烯酸二甲氨基乙酯（DA）的季铵盐，外观呈无色透明或淡黄色液体，相对分子质量193.67，相对密度1.132g/mL（25℃），折射率（n）1.478，闪点>230℉，溶于水及甲醇、乙醇，不溶于丙酮、酯、烃等有机溶剂[1,2]。DAC是一种重要的水溶性阳离子季铵盐单体，可以均聚或与其他单体共聚，形成相对分子质量系列化的均聚物和或共聚物。