Hypercrosslinked polystyrene microspheres with bimodal pore size distribution and controllable macroporosity
Hypercrosslinked polystyrene microspheres with bimodal pore size distribution and controllable macroporosity
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DOI：
10.1002/app.31422
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发表时间：
2010-04
影响因子：
3
通讯作者：
Qingquan Liu;Li Wang;Weiting Yu;Anguo Xiao;Haojie Yu;J. Huo
中科院分区：
文献类型：
--
作者：
Qingquan Liu;Li Wang;Weiting Yu;Anguo Xiao;Haojie Yu;J. Huo
采用悬浮聚合和后交联相结合的方法，以甲苯和聚丙烯（PP）为共生剂，制备了具有可控双峰孔径分布的超交联聚苯乙烯（H-PS）微球。改变复合材料中PP的比例，研究复合材料组成对H-PS微球孔隙结构的影响。少量PP的加入使H-PS微球具有明显的双峰孔径分布和宏观孔隙度的控制，在催化剂载体的制备中具有潜在的应用前景。H-PS微球的比表面积可通过改变co - ogen中PP的浓度在380 ~ 790m2 /g范围内调节。此外，H-PS微球在热力学差的溶剂（如水）和良好的溶剂（如甲苯）中都能膨胀，显示出达万科夫型树脂的所有特征。最后，通过结合孔隙结构数据和微球在交联前后的外观，研究了聚合和交联后孔隙形成的可能机制。©2009 Wiley期刊公司高分子学报，2010
A combination of suspension polymerization and postcrosslinking was used to prepare hypercrosslinked polystyrene (H-PS) microspheres with controllably bimodal pore size distribution in the presence of toluene and polypropylene (PP) as a coporogen. The proportion of PP in the coporogen was changed to investigate the influence of the coporogen composition on the pore structure of the H-PS microspheres. The addition of a small amount of PP achieved the aim of a clearly bimodal pore size distribution and the control of the macroporosity of the H-PS microspheres, which have potential application in the preparation of catalyst supports. The specific surface area of the H-PS microspheres could be adjusted in the range 380–790 m2/g by changes in the concentration of PP in the coporogen. Moreover, the H-PS microspheres displayed all the characteristics of Davankov-type resins by their ability to be swollen in both thermodynamically poor solvents such as water and good solvents such as toluene. Finally, the possible mechanism of porosity formation during polymerization and postcrosslinking was also examined by a combination of pore structure data and the appearance of the microspheres before and after postcrosslinking. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010