微波辐射无皂乳液聚合法制备单分散交联PMMA微球及其性能研究  

Preparation and Properties of Monodisperse-Crosslinked PMMA Microspheres Prepared by the Microwave Irradiation Soap-Free Emulsion Polymerization

作　　者：贾慧灵[1,3,4] 郭峰 吴锦绣 谭心[1] 李森 JIA Huiling;GUO Feng;WU Jinxiu;TAN Xin;LI Sen(College of Mechanical Engineering,Inner Mongolia University of Sciences and Technology,Baotou 014010,China;College of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory of Green Extraction and Efficient Utilization of Light Rare-Earth Resources,Ministry of Education,Baotou 014010,China;Inner Mongolia Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application,Baotou 014010,China)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010 [2]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [3]轻稀土资源绿色提取与高效利用教育部重点实验室,内蒙古包头014010 [4]内蒙古自治区稀土湿法冶金与轻稀土重点实验室,内蒙古包头014010

出　　处：《塑料工业》2024年第6期43-48,共6页China Plastics Industry

基　　金：国家自然科学基金项目(51965053,62365015);内蒙古自然基金项目(2022MS05038)。

摘　　要：采用无皂乳液聚合法,以二乙烯苯为交联剂,氯化钾为电解质,过硫酸钾为引发剂,在微波辐射条件下制备了聚甲基丙烯酸甲酯(PMMA)微球。研究了过硫酸钾和氯化钾的物质的量浓度对PMMA微球的平均粒径和多分散性指数的影响,分析了微波功率、搅拌速度与PMMA微球形貌和粒径的关系。检测了不同pH值时PMMA乳液的电动(Zeta)电位,表明PMMA表面产生负电荷,使PMMA微球呈现稳定的分散状态。制备的PMMA呈现类球形,粒径为100~400 nm,在过硫酸钾物质的量浓度为5.69×10^(-3)mol/L及氯化钾物质的量浓度为1.03×10^(-2)mol/L时,微球的多分散性指数<0.1。原子力显微镜检测了最优工艺条件下,PMMA微球的力—位移曲线并分析了其弹性力学性能。Under the microwave irradiation,polymethyl methacrylate(PMMA)microspheres were prepared by the soap-free emulsion polymerization using divinylbenzene as a crosslinking agent,potassium chloride as an electrolyte and potassium persulfate as an initiator.The effects of potassium persulfate and potassium chloride molarities on the mean particle sizes and polydispersity index of PMMA microspheres were studied.The relationships between the microwave power,the stirring speeds,the morphologies and particle sizes of PMMA microspheres were analyzed.The electrokinetic(Zeta)potential of PMMA emulsion was measured at different pH values.The results show that the surfaces of PMMA microspheres produce a negative charge,and the PMMA microspheres show a stable dispersion state.The prepared PMMA microspheres were spherical with particle sizes of 100-400 nm.The polydispersity index of the microspheres is less than 0.1 when the molarity of potassium persulfate is 5.69×10^(-3)mol/L and the molarity of potassium chloride is 1.03×10^(-2)mol/L.The force-displacement curves of PMMA microspheres prepared at the optimum process conditions were measured by atomic force microscopy and their elastomechanical properties were analyzed.

关 键 词：聚甲基丙烯酸甲酯 微波辐射 无皂乳液聚合 单分散 粒径 多分散性指数 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]