大比表面积羧基化聚苯乙烯微球的制备及表征  

Preparation and characterization of modified polystyrene microsphere

作　　者：侯彦辉[1,2] 李景民 安清明 宋光坤 HOU Yan-hui;LI Jing-min;AN Qing-ming;SONG Guang-kun(School of Material Science and Engineering,Tiangong University,Tianjin 300387,China;State Key Laboratory of Separation Membrances and Membrane Processes,TiangongUniversity,Tianjin 300387,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387

出　　处：《天津工业大学学报》2021年第1期36-41,47,共7页Journal of Tiangong University

基　　金：中国石油科技创新基金项目(2015D-5006-0502)。

摘　　要：为了获得羧基化的聚合物微球,利用改进的二步溶胀法,以无皂乳液聚合制备的聚苯乙烯种子微球溶胀羧基功能单体和交联剂,制备羧基化改性聚苯乙烯微球,研究羧基单体种类、种子球添加量对微球的影响,确定了最佳的聚合反应条件,并采用XPS和扫描电子显微镜表征了聚合物结构和微球的形貌。结果表明:以苯乙烯-二乙烯苯-甲基丙烯酸为原料聚合得聚合物微球形貌不规整,且颗粒大小不一,原因推测为甲基丙烯酸亲水性强,不易与二乙烯基苯及聚苯乙烯种子微球互溶,造成不能完全共聚;以苯乙烯-二乙烯苯-丙烯酸叔丁酯为原料进行聚合能得到形貌良好,比表面积大的微球颗粒,力学性能适中;在聚苯乙烯种子微球质量∶BA质量∶DVB质量=1.5∶10∶8时,得到了形貌较好、比表面积达到9.312 m2/g的丙烯酸叔丁酯改性聚苯乙烯微球。In order to obtain polymer microspheres with large specific surface area and carboxylation,the carboxylated polystyrene microspheres with special morphology were prepared by modified two-staged seeded swelling polymerization.In the process of polymerization,divinylbenzene and carboxyl functional monomers were used to swell polystyrene seed.The effects of the kinds of carboxyl monomers and the amount of seedballs on the microspheres were studied,and the optimum reaction conditions were determined.The structure of the polymer and the morphology of the microspheres were characterized by SEM and XPS.The results show that polymer microspheres prepared from styrene-divinylbenzene-methacrylic acid have irregular morphology and different particle sizes.It is presumed that methacrylic acid has strong hydrophilicity and is not easily soluble with divinylbenzene and polystyrene seed,resulting in incomplete copolymerization;microspheres with good morphology,large specific surface area and moderate mechanical strength can be obtained by polymerization of styrene-divinylbenzene-butyl acrylate;when polystyrene seed∶BA∶DVB=1.5∶10∶8(w/w),polystyrene microspheres modified by butyl acrylate with good morphology and specific surface area of 9.312 m2/g were obtained.

关 键 词：聚合物微球 苯乙烯 丙烯酸叔丁酯 大比表面积 羧基化 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]