| 硅烷偶联剂-PMMA复合接枝包覆绢云母及其改性机理 |
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| 引用本文： | 薛茹君,吴玉程.硅烷偶联剂-PMMA复合接枝包覆绢云母及其改性机理[J].矿物学报,2009,29(1). |
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| 作者姓名： | 薛茹君 吴玉程 |
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| 作者单位： | 1. 安徽理工大学化学工程学院,安徽淮南232001;合肥工业大学材料科学与工程学院,安徽合肥230009
2. 合肥工业大学材料科学与工程学院,安徽合肥,230009 |
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| 基金项目： | 合肥工业大学中青年创新群体基金(103-037016) |
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| 摘 要： | 通过硅烷偶联剂-PMMA复合接枝聚合在超细绢云母粉体表面接枝上聚合物,得到核壳型PMMA/绢云母。经红外光谱(IR)分析知其改性机理为:硅烷偶联剂KH570与超细绢云母表面的羟基发生化学键合而实现预先接枝不饱和基团;在适当的聚合条件下,粉体表面的乙烯基与甲基丙烯酸甲酯单体共聚合,得到核壳型PMMA/绢云母。用热分析(DSC-TG)方法研究了偶联条件及共聚合的条件,得出核壳型PMMA/绢云母的制备条件是:偶联剂浓度7.5%,偶联温度70℃,偶联时间3h;单体用量12.5mL/g,引发剂用量0.015g/mL,温度80℃,时间9h。增加聚合度可以得到绢云母/PMMA复合粉,透射电镜(TEM)观察知绢云母在聚合物中高度分散无团聚。
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| 关 键 词： | 绢云母 硅烷偶联剂 PMMA 接枝聚合 机理 |
RESEARCH ON GRAFT COPOLYMERIZATION MECHANISM OF SERICITE WITH SILANE COUPLING AGENT AND PMMA |
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| XUE Ru-jun,WU Yu-cheng.RESEARCH ON GRAFT COPOLYMERIZATION MECHANISM OF SERICITE WITH SILANE COUPLING AGENT AND PMMA[J].Acta Mineralogica Sinica,2009,29(1). |
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| Authors: | XUE Ru-jun WU Yu-cheng |
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| Institution: | 1. School of Chemical Engineering;Anhui University of Science and Technology;Huainan 232001;China 2. School of Materials Science and Engineering;Hefei University of Technology;Hefei 230009;China; |
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| Abstract: | A polymer was grafted on the surface of sericite powder by co-polymerizing modification with silane coupling agent KH570 and PMMA,and core-shell structured PMMA/sericite was obtained.It was shown by IR that the unsaturated group was pre-grafted on the sericite surface by silane coupling agent KH570 compounded with the Si-OH of sericite.Under proper polymerizing conditions the ethylenic link on the powder surface was co-polymerized with methylmethacrylate(MMA) to obtain core-shell structured PMMA/sericite.Vi... |
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| Keywords: | sericite silane coupling agent PMMA graft co-polymerization mechanism |
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