摘要
以丙烯酸甲酯(MA)与2-氯乙醇(CE)为反应原料,通过酯交换反应制备了丙烯酸氯乙醇酯(CA)中间体,再将CA与三甲胺(TMA)水溶液反应,合成了一种用于制备两性聚羧酸类高聚物的阳离子丙烯酸酯单体(丙烯酰氧乙基三甲基氯化铵,DAC).采用FTIR和1 HNMR对DAC结构进行了表征,并考察了n(TMA)/n(CA)、催化剂用量、阻聚剂用量、反应温度和反应时间对CA转化率和DAC质量分数的影响.结果显示:最佳制备工艺条件为n(TMA)/n(CA)=1.2,催化剂用量为CA中间体质量的4.5%,阻聚剂用量为CA中间体质量的0.6%,反应温度为50℃,反应时间为3h.以DAC为阳离子单体,与丙烯酸(AA)、聚乙二醇单甲醚丙烯酸酯(MPEGAA)通过反相乳液共聚合制得两性聚羧酸类高聚物,该高聚物具有优异的保坍性和较高的早期抗压强度.
A cationic acrylate monomer,[2-（acryloyloxy）ethyl]trimethyl ammonium chloride,DAC）,used for synthetizing amphoteric carboxylic acid polymer was prepared by reaction of 2-chloroethyl acrylate（CA）intermediate and trimethylamine（TMA）aqueous solution.The 2-chloroethyl acrylate（CA）intermediate was prepared by transesterification of methyl acrylate and 2-chloroethanol.The DAC structure was identified by means of FTIR and 1 HNMR.The influences of n（TMA）/n（CA）,dosages of catalyst and polymerization inhibitor,reaction temperature and reaction time were investigated with the conversion rate of CA and mass fraction of DAC.The results show that the optimal technological conditions for the preparation includes：n（TMA）/n（CA）is 1.2,the dosage of catalyst is 4.5% and the dosage of polymerization inhibitor is 0.6%according to the mass of CA,the reaction temperature is 50 ℃ and the reaction time is 3 h.And the amphoteric carboxylic acid polymer was prepared by means of inverse emulsion copolymerization of DAC,acrylic acid（AA）and methoxypolyethylene glycol acrylate（MPEGAA）,which has good keeping slump and high early compressive strength.
出处
《延边大学学报（自然科学版）》
CAS
2015年第4期307-312,共6页
Journal of Yanbian University（Natural Science Edition）
基金
福建省教育厅A类科技计划项目(JA11329
JA12412)
泉州市科技计划重点项目(2013Z47
2013Z158)
