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高相对分子质量P(DMC-AM)合成研究

时间:2017-08-12 14:53来源:毕业论文
论文以工业甲基丙烯酰氧乙基三甲基氯化铵(DMC)和丙烯酰胺(AM)为原料,过硫酸铵-亚硫酸氢钠为氧化还原引发体系,采用引发剂一次性加入,两步升温方式合成了阳离子度为30%的高
摘要本毕业论文以工业甲基丙烯酰氧乙基三甲基氯化铵(DMC)和丙烯酰胺(AM)为原料,过硫酸铵-亚硫酸氢钠为氧化还原引发体系,采用引发剂一次性加入,两步升温方式合成了阳离子度为30%的高相对分子质量P(DMC-AM)。探讨了引发剂用量、单体质量分数、反应温度、引发剂配比、反应助剂用量、熟化温度等因素对产物特征黏度及单体转化率的影响规律。结果表明:单体起始含量55%,引发剂占单体质量分数0.05%,n((NH4)2S2O8):n(NaHSO3)=2:1,助剂Na4EDTA占单体质量分数0.02%,在反应温度51℃下反应3h,在60℃熟化2h,是30%阳离子度P(DMC-AM)制备的较佳合成条件。在该工艺条件下,得到了特征黏度为9.16dL/g、转化率98.8%的高特征黏度、高转化率P(DMC-AM)样品。12367
关键词  甲基丙烯酰氧乙基三甲基氯化铵,丙烯酰胺, 水溶液聚合,氧化还原引发体系,特征黏度,单体转化率
毕业设计说明书(论文)外文摘要
Title  Synthesis of High Molecular Weight P(DMC-AM)
Abstract
Using industrial methacrylatoethyltrimethyl ammonium chloride (DMC) and acrylamide (AM) as raw material, ammonium persulfate-sodium bisulfite as redox initiator, 30% cationic degrees P(DMC-AM) with high molecular weight was synthesized by adding all initiator in lump and rasing the polymerization temperature in two steps in the paper. The influences of factors, such as the dosage of initiator, the initial concentration of monomer, polymerization temperature, the ratio of initiator, the dosage of EDTA and ageing temperature on the intrinsic viscosity of the product and monomer conversion were investigated respectively. The results showed that the optimum process conditions of 30% cationic degrees P(DMC-AM) were that the initial concentration of monomer was 55%,  initiator in mass fraction of monomer was 0.05%, n((NH4)2S2O8):n(NaHSO3) was 2:1, Na4EDTA in mass fraction of monomer was 0.02%, polymerization temperature was 51℃ for 3 h reaction time, ageing temperature was 60℃ for 2 h reaction time. Under the conditions, the intrinsic viscosity of P(DMC-AM) was 9.16 dL/g and the conversion reached 98.8%. 源自六&维"论*文'网.加7位QQ3249'114 www.lwfree.cn
Keywords  methacrylatoethyltrimethyl ammonium chloride, acrylamide, water solution polymerization, redox initiator system, intrinsic viscosity, monomer conversion
目录    1
1 绪论    3
1.1 合成P(DMC-AM)的两种单体    3
1.1.1甲基丙烯酰氧乙基三甲基氯化铵(DMC)    3
1.1.2丙烯酰胺AM    4
1.1.2.1丙烯酰胺及其聚合物的性质及合成    4
1.1.2.2丙烯酰胺的用途    5
1.1.2.3丙烯酰胺的安全性    5
1.2 P(DMC-AM)的性质和应用    6
1.3 P(DMC-AM)的合成及制备    7
1.3.1溶液聚合法    7
1.3.2乳液聚合    10
1.3.2.1反相乳液聚合    10
1.3.2.2分散聚合    11
1.4存在问题    12
2 实验原理    13
2.1 DMC与AM自由基聚合原理    13
2.1.1链引发反应    13
2.1.2链增长反应    14
2.1.3链终止反应和链转移反应    14
2.2反应动力学基础    14
3 实验部分    16
3.1实验仪器和药品    16
3.2实验方案设计及结果评价    17
3.2.1设计思路    17
3.2.2 P(DMC-AM)合成的具体操作步骤    18
3.2.3分析测试    18
3.2.3.1固含量    18
3.2.3.2单体转化率    19
3.2.3.3特征黏度    20
3.3实验结果与讨论    20 高相对分子质量P(DMC-AM)合成研究:http://www.lwfree.cn/huaxue/20170812/12112.html
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