亚2微米聚合物微球的合成及影响因素  

The synthesis of sub-2μm polymer microspheres and the influence factors

作　　者：柯从玉[1] 李菲[1] 贾新刚[1] 张群正[1] 张会强 

机构地区：[1]西安石油大学化学化工学院,陕西西安710065 [2]陕西省环境监测中心站,陕西西安710054

出　　处：《西北大学学报（自然科学版）》2015年第3期435-439,共5页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(20975079);陕西省教育厅专项基金资助项目(2013JK0648);陕西省自然科学基金资助项目(2014JM2052)

摘　　要：采用分散聚合法合成了粒径为0．8μm的聚苯乙烯种子，再通过一步溶胀法制备了亚2μm甲基丙烯酸环氧丙酯微球。研究了溶胀倍数、稀释剂比例、聚合温度、搅拌速度以及致孔剂等因素对溶胀、聚合过程和最终产物形态、结构的影响。结果表明，在控制溶胀倍数为8～16，SDS 0．1％，PVA 0．5％、溶胀和聚合物温度分别为30～35℃以及70～74℃。聚合时间为18～24h、搅拌速度为120～200r／min的条件下可合成出粒径为1．8μm的单分散甲基丙烯酸环氧丙酯微球、分散系数为0．2。而且，无孔亚2μm聚合物微球比多孔聚合物微球具有更好的耐压性，最高耐压力可以达到28MPa。Polystyrene seeds with the particle size 0. 8μm were synthesized by dispersion polymerization, and then the 2μm glycidyl methacrylate microspheres were prepared by one-step swelling. Experimental study cov- ers the influence factors of swelling ratio, diluents ratio, polymerization temperature, stirring speed and pore forming agent on polymerization process and the morphology structure of the final product. Results show that the sub-2μm monodisperse glyeidyl methacrylate microspheres can be prepared by controlling the swelling ratio in 8 - 16 times, SDS 0. 1%, PVA 0. 5% , swelling and polymerization temperature 30 -35℃ and 70 -74℃, respectively, reaction time 18 -24 h, stirring speed 120 -200 r/min. The dispersion coefficient of micro- spheres is 0. 2. The experiments also show that the pressure resistable of sub-2μm non-porous polymer micro- sphere is better than that of porous polymer mierospheres, the highest pressure can reach 28 MPa.

关 键 词：亚2微米 分散聚合法 一步溶胀法 乙 甲基丙烯酸环氧丙酯微球 

分 类 号：O657.7[理学—分析化学]