室温低功率紫外光辐照法制备聚苯乙烯微球  

Room-Temperature Preparation of Polystyrene Microspheres by Irradiation of Low-Power Ultra Violet Light

作　　者：庄泽锋 何永[1] 谢煌培 蔡梓煜 孙丰强[1] 

机构地区：[1]华南师范大学化学与环境学院,广州510006

出　　处：《华南师范大学学报（自然科学版）》2017年第2期61-67,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(21571068);广东省自然科学基金项目(2015A030313387);广州市科技计划项目(201607010301)

摘　　要：以偶氮二异丁腈(AIBN)为光引发剂,甲醇为溶剂,聚乙烯吡咯烷酮(PVP)为稳定剂,通过抽真空取代氮气保护,利用8 W 365 nm波长的紫外灯光照,室温下引发分散聚合制备聚苯乙烯微球.这种真空状态下的聚合只适合于光聚合,当紫外光照射时,AIBN吸收光子使C—N键断裂而形成自由基,进一步引发苯乙烯单体聚合.研究表明,试剂(引发剂、稳定剂和单体)用量、光强度以及反应时间对微球尺寸和单分散性存在规律性的影响,适当调节这些参数可获得一定尺寸和单分散的微球.该方法成本低廉、操作简便、具有一定的普适性,可适用于其它聚合物微球和功能化有机-无机复合微球的制备,例如PMMA、PMAA微球及P(MMA-co-MAA)共聚微球等.Taking styrene as initial monomer, 2,2＇-azobisisobutyronitrile （AIBN） as photo-initiator, methanol as solvent, and polyvinylpyrrolidone （PVP） as dispersant, polystyrene microspheres were obtained by a dispersion photopolymerization way under the irradiation of 8 W 365 nm ultraviolet light. Instead of N2 protection, the vacuum was first introduced to help the polymerization and it had been proved that only the photopolymerization could be used in vacuum. When UV light irradiated the reaction system, the C-N bond of AIBN could be broken for the ab- sorption of photons and free radicals would form, and then these radicals would induce the polymerization of sty- rene. The experiments showed that quantity of reactants （ initiators, dispersants and monomers）, power of light and reaction time could regularly affect the size and size distributions of the finally obtained microspheres. Tuning these factors properly, monodispersed microspheres with certain size could be easily prepared. This method is low-cost, simple, safe and universal for the preparation of microspheres. It could be also used to fabricate other polymer mi- crospheres, such as PMMA, PMAA, P（MMA-co-MAA） copolymer microspheres and even the functional organic -inorganic composite microspheres.

关 键 词：光引发聚合 聚苯乙烯微球 真空 室温 

分 类 号：O632.13[理学—高分子化学]