| 摘要: |
| 利用悬浮聚合法,首次以乙丙共聚物和甲苯为共致孔剂制备了具有高比表面积、孔连通性良好的聚二乙烯基苯(PDVB)微球.通过改变共致孔剂中乙丙共聚物的用量研究其对微球孔结构的影响.用扫描电镜观察了微球的表面形貌,氮气吸脱附和压汞法表征了微球的孔结构参数及孔径分布曲线.结果表明该共致孔剂中PEP的用量达到2.0 %时,可诱导PDVB发生双相分离,其中,与基体不相容的PEP诱导第一次早期的相分离,而与基体相容的甲苯则诱导了第二次晚期的相分离.双相分离对微球的孔连通性、比表面积、孔体积和平均孔径等结构参数均有一定的影响.总的来说,为可控制备具有可控孔结构的聚合物微球提供了一条新的技术路线. |
| 关键词: 多孔微球 聚二乙烯基苯 乙丙共聚物 双相分离 孔连通性 |
| DOI： |
| 分类号:Q63;O632 |
| 基金项目:中国博士后基金面上项目(2011M501285);湖南省大学生创新性实验计划项目(KDSC1106) |
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| Research on the effect of novel Co-porogen on the pore structure of porous polydivinylbenzene beads |
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LIU Qing-quan1,2,PAN Chun-yue2, SHEN Shao-hua1, WANG Ming-yu1, WANG Juan1, ZHANG Peng-peng11,2
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1.College of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201,China;2.College of Chemistry and Chemical Engineering, Central South University, Changsha 411201,China
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| Abstract: |
| Polydivinylbenzene (PDVB) beads with high specific surface area and excellent pore connectivity were prepared by traditional suspension polymerization, through poly(ethylene-b- propylene) (PEP) and toluene (TOL) as a novel co-porogen. PEP concentration in co-porogen was changed to investigate PEP amount on the pore structure of PDVB beads. The surface morphology of PDVB beads was observed by SEM, and the pore structure and the pore size distribution curves were characterized by N2 sorption and Hg intrusion technique. The results indicated that co-porogen of 2.0% PEP in TOL induce double phase separation. PEP induce an early phase separation due to PEP being incompatible with PDVB network, and TOL induce a late phase separation as TOL is a thermodynamically compatible solvent for PDVB network. Double phase separation have significant effect on the pore connectivity, the specific surface area, the pore volume, and the average pore diameter of PDVB beads. Overall, the present manuscript provide a novel technique route to prepare porous polymer beads with controllable pore structure. |
| Key words: porous beads, polydivinylbenzene, poly(ethylene-b-propylene), double phase separation, pore connectivity |
