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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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沉淀聚合法Poly(DVB-co-EGDMA-co-MAA)功能聚合物微球的制备及表征
DOI: 10.3724/SP.J.1105.2012.11305, PP. 633-639
Keywords: 沉淀聚合,微球,二乙烯基苯-55,乙二醇二甲基丙烯酸酯,甲基丙烯酸
Abstract:
采用二乙烯基苯-55(DVB-55)和乙二醇二甲基丙烯酸酯(EGDMA)作为混合交联剂,乙腈为溶剂,偶氮二异丁腈(AIBN)为引发剂,以甲基丙烯酸为功能单体采用沉淀聚合法合成了单分散或窄分散的、表面具有羧基的交联聚合物微球,所得微球的粒径变化范围为0.6~3.8μm.通过调节交联剂DVB-55和EGDMA的投料比,可以对微球的粒径、粒径分布、产率、热稳定性以及表面官能团含量进行有效控制.文中对混合交联剂DVB-55与EGDMA比例的改变对微球的粒径、粒径分布以及产率的影响机理给出了理论解释;对DVB和EGDMA的兼容性研究表明,制备的三元聚合物微球的核拥有比投料比稍多的DVB单元,而微球的外层则以在预聚混合物中占更大比例的交联剂为主.
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