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首页> 外文期刊>Journal of Applied Polymer Science >The influence of the different modifying agents on the synthesis of poly(methylmethacrylate)-calcium carbonate nanocomposites via soapless emulsion polymerization
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The influence of the different modifying agents on the synthesis of poly(methylmethacrylate)-calcium carbonate nanocomposites via soapless emulsion polymerization

机译：不同改性剂对无皂乳液聚合合成聚甲基丙烯酸甲酯-碳酸钙纳米复合材料的影响

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摘要

The synthesis of poly(methylmethacrylate)calcium carbonate nanocomposites via the soapless emulsion polymerization was investigated after the CaCO3 nanoparticles were modified with different modifying agents. Such three kinds of modifying agents as sodium stearate (SS), oleic acid (OA), and PMMA were used to improve the surface property of CaCO3 nanoparticles. What was the most important factor to improve the amount of nano-particles in the composites is one of the general goals. As determined by Field-emission scanning electron microscopy (FESEM), the nanocomposites size of the diluted polymer emulsion was over 250 nm, while the sample without CaCO3 had a diameter of about 150 run. It was worth pointing out that the surface morphology of polymer changed from slick to scraggy, when the nano-CaCO3 particles participated in the polymerization process. The increase of the droplet size and the change of the polymer morphology indicated that the CaCO3 nanoparticles were present in the emulsion droplets. The X-ray diffraction results of the nanocomposites showed the existence of typical calcite peaks. The results of the TGA, FTIR, and the contact angles indicated that the hydrophobic surface of CaCO3 nanoparticles was crucial to improve the compatibility between the CaCO3 and MMA monomer in emulsion system. The results of the TGA, FTIR, and the contact angles indicated that the hydrophobic surface of CaCO3 nanoparticles was crucial to improve the compatibility between the CaCO3 and MMA monomer in emulsion system. (c) 2008 Wiley Periodicals, Inc.
机译：研究了用不同的改性剂对CaCO3纳米颗粒进行改性后，通过无皂乳液聚合法合成聚甲基丙烯酸甲酯碳酸钙纳米复合材料的方法。硬脂酸钠（SS），油酸（OA）和PMMA等三种改性剂用于改善CaCO3纳米颗粒的表面性能。改善复合材料中纳米颗粒数量的最重要因素是总目标之一。如通过场发射扫描电子显微镜（FESEM）所确定的，稀释的聚合物乳液的纳米复合物尺寸超过250nm，而不含CaCO 3的样品的直径为约150nm。值得指出的是，当纳米CaCO3颗粒参与聚合过程时，聚合物的表面形态从光滑变为松散。液滴尺寸的增加和聚合物形态的变化表明，乳液液滴中存在CaCO3纳米颗粒。纳米复合材料的X射线衍射结果表明存在典型的方解石峰。 TGA，FTIR和接触角的结果表明，CaCO3纳米颗粒的疏水表面对于提高CaCO3和MMA单体在乳液体系中的相容性至关重要。 TGA，FTIR和接触角的结果表明，CaCO3纳米颗粒的疏水表面对于提高CaCO3和MMA单体在乳液体系中的相容性至关重要。 （c）2008 Wiley期刊公司

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