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    徐守芳, 李春忠, 陈雪花. 纳米碳酸钙颗粒表面接枝聚合甲基丙烯酸甲酯的结构及机理分析[J]. 华东理工大学学报(自然科学版), 2005, (5): 602-605.
    引用本文: 徐守芳, 李春忠, 陈雪花. 纳米碳酸钙颗粒表面接枝聚合甲基丙烯酸甲酯的结构及机理分析[J]. 华东理工大学学报(自然科学版), 2005, (5): 602-605.
    XU Shou-fang, LI Chun-zhong , CHEN Xue-hua. Mechanism and Structure Analysis of Polymethylmethacrylate Coated on Calcium Carbonate Nanoparticles by Graft Polymerization[J]. Journal of East China University of Science and Technology, 2005, (5): 602-605.
    Citation: XU Shou-fang, LI Chun-zhong , CHEN Xue-hua. Mechanism and Structure Analysis of Polymethylmethacrylate Coated on Calcium Carbonate Nanoparticles by Graft Polymerization[J]. Journal of East China University of Science and Technology, 2005, (5): 602-605.

    纳米碳酸钙颗粒表面接枝聚合甲基丙烯酸甲酯的结构及机理分析

    Mechanism and Structure Analysis of Polymethylmethacrylate Coated on Calcium Carbonate Nanoparticles by Graft Polymerization

    • 摘要: 通过甲基丙烯酸甲酯(MMA)的自由基聚合实现了纳米碳酸钙表面聚甲基丙烯酸甲酯(PMMA)接枝改性,对碳酸钙表面接枝的PMMA进行了分析表征,并对接枝改性机理进行了探讨。MMA接枝聚合改性纳米碳酸钙粒子的红外分析和碳酸钙表面接枝聚合物的。H-核磁分析表明:甲基丙烯酸甲酯聚合在纳米碳酸钙的表面;凝胶渗透色谱分析表明:碳酸钙表面接枝的PMMA相对分子质量大于MMA水相均聚物,而且分子量分布较均聚物宽;随着MMA单体用量的增加,纳米碳酸钙表面PMMA接枝率增加,接枝密度增加,但PMMA在纳米碳酸钙表面的接枝聚合度基本不变。

       

      Abstract: Calcium carbonate nanoparticles were modified by methylmethacrylate(MMA) polymerization which was ignited by K_2S_2O_8.The structure of polymethylmethacrylate(PMMA) grafted on calcium carbonate was characterized and the mechanism of graft polymerization surface modification was discussed.The results of infrared spectrum of modified CaCO_3 and()~1H-nuclear magnetic resonance of G-PMMA(indicate) that PMMA is present on the surface of CaCO_3 nanoparticles.Gel permeation chromatography(GPC) results show that G-PMMA has a higher molecular weight and a wider polydispersity than those of homopolymerized PMMA.Increasing the MMA content results in an increased graft rate,a higher graft density,but little change in graft intensity.

       

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