摘要本文以工业品丙烯酰氧乙基三甲基氯化铵(DAC)为原料,无机过氧化物(A)为引发剂,某种螯合剂(B)为络合剂,采用引发剂一次性加入--两步升温的水溶液聚合方式聚合,得到产物聚丙烯酰氧乙基三甲基氯化铵(PDAC)。经单因素探究实验和正交优化实验后,得到的最佳工艺条件为:w(DAC)=55%,m(A):m(DAC)=1。0%,m(B):m(DAC)=0。010%,在引发温度T1=46。0℃的条件下聚合3h后,再在熟化温度 T2=60。0℃的条件下聚合3 h。该工艺条件所得到的PDAC胶体产物的特征黏度为12。40 dL/g,单体转化率为98。40%,所得产物PDAC特征黏度值超过了目前文献报导最高值,并用FTIR对产物结构进行了表征。本文所得结果为PDAC的合成工艺条件进一步优化以及系列化相对分子质量PDAC的制备奠定了基础。73229
毕业论文关键词: 丙烯酰氧乙基三甲基氯化铵(DAC) 均聚 聚合工艺 特征粘度 单体转化率
毕业设计说明书(论文)外文摘要
Title Research on high molecular weight preparation process of PDAC
Abstract Using industrial monomer of acryloyloxyethyltrimethyl ammonium chloride(DAC)as raw material, inorganic peroxides (A) as initiator and B as chelating agent in this paper, used the method of adding initiator one-time and two-step warming for aqueous solution polymerization to preparation of poly(acryloyloxyethyltrimethyl ammonium chloride) (PDAC)。 After explored the results of single-factor experiments and orthogonal experiments, the optimum process condition were :w(DAC)=55%, m(A):m(DAC)=1。0%, m(B):m(DAC)=0。010%, initiation temperature T1=46。0℃ and then curing temperature T2=60。0℃, each for 3h。 In the process conditions, the intrinsic viscosity of PDAC and monomer conversion rate reached 12。40 dL/g and 98。40% respectively, which beyond the highest value reported in the literatures up to now。 The structure of the product was characterized via FTIR spectra。 The obtained results of this paper were expected to lay a foundation for the further research on the optimization and preparation of PDAC products with serial molecular weights。
Keywords:acryloyloxyethyltrimethyl(DAC) homopolymerisation processing
intrinsic viscosity conversion
目 次
1。绪论 1
1。1 概述 1
1。2 研究背景 1
1。3 DAC的结构与性质 1
1。4 研究进展 2
1。5 存在问题 5
2。 实验原理 6
2。1 DAC单体聚合历程 6
2。2 自由基聚合反应速率方程 6
2。3 聚合度倒数方程 7
3.实验方案设计 8
3。1 基准条件的选定 8
3。2 单因素探索实验 8
3。3 正交优化实验 9
3。4 产物表征 9
3。5 实验设计方案图