沉淀聚合法制备交联聚丙烯酸-聚甲基丙烯酸甲酯复合微球及其增稠性能  

Study on Preparation and Thickening Properties of Composite Microsphere of Crosslinked Poly(Acrylic Acid)-Poly(MMA)

作　　者：翁婷婷 彭慧莲 谢奕标 彭长兰 周亮[1] WENG Ting-ting;PENG Hui-lian;XIE Yi-biao;PENG Chang-lan;ZHOU Liang(Guangdong Industry Polytechnic,Guangdong Foshan 520225,China)

机构地区：[1]广东轻工职业技术学院,广东佛山520225

出　　处：《广州化工》2022年第11期43-45,共3页GuangZhou Chemical Industry

基　　金：广州市科技计划项目(No:201704030130)。

摘　　要：亲水性高分子微球在水溶液中紧密堆积,限制了水的剪切流动,对水溶液表现出增稠作用。为了考察亲水性高分子微球中引进憎水性高分子链形成复合微球的增稠效应,以二甲苯为溶剂,以季戊四醇三烯丙基醚为交联剂,以偶氮二异丁氰为引发剂,采用沉淀聚合法制备交联聚丙烯酸-聚甲基丙烯酸甲酯复合微球,采用红外光谱、激光粒度仪、扫描电子显微镜表征其结构,采用旋转粘度计测试其水溶液粘度。结果表明,交联聚丙烯酸-聚甲基丙烯酸甲酯复合微球的平均粒径为300 nm,扫描电子显微镜照片显示微球形成缠结;复合微球在酸性条件下的水溶液粘度较低,在中性或者碱性条件下粘度显著增大;添加聚甲基丙烯酸甲酯可显著提升复合微球在中性水溶液中的增稠效果,合适的聚甲基丙烯酸甲酯添加量为丙烯酸质量的13.5%,而合适的交联剂用量为2.0%。Hydrophilic microspheres closely packed in water,leading to thickening effect for aqueous solutions as a result of blocked shear flow of water.The effect of hydrophobic polymer MMA(methyl methylacrylate)on the thickening property of hydrophilic microspheres was invesrigated,composite microspheres of crosslinked poly(acrylic acid)-poly(MMA)were prepared with precipitation polymerization of acrylic acid in xylene containing dissolved methyl methylacrylate(MMA),by using pentaerythritol priallyl ether as crosslinker,and 2,2’-Azobis(2-methylpropionitrile)as initiator.The composite microspheres were characterized with FT-IR,particle size and SEM,and their thickening properties were investigated as well.The results showed that the average particle size was 250 nm,and the microspheres got tangled.The composite microspheres showed little thickening effect in acidic solutions,while very good thickening effect in neutral or alkaline solutions.The composite microspheres got the best thickening property when the dosage of MMA was 13.5 wt%,and the dosage of crosslinker was 2.0 wt%.

关 键 词：复合微球 聚甲基丙烯酸甲酯 丙烯酸 增稠性能 

分 类 号：TQ317.3[化学工程—高聚物工业]