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首页> 外文期刊>Polymer Composites >The Effect of Clay Modification on the Mechanical Properties of Poly( methyl methacrylate)/Organomodified Montmorillonite Nanocomposites Prepared by In Situ Suspension Polymerization
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The Effect of Clay Modification on the Mechanical Properties of Poly( methyl methacrylate)/Organomodified Montmorillonite Nanocomposites Prepared by In Situ Suspension Polymerization

机译：粘土改性对原位悬浮聚合制备的聚甲基丙烯酸甲酯/有机改性蒙脱土纳米复合材料力学性能的影响

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Poly(methylmethacrylate) (PMMA)/montmorillonite (MMT) nanocomposites were prepared by in situ suspension polymerization. MMT was previously organically modified by different modification agents [dioctadecyl dimethyl ammonium chloride (DODAC) and methacrylatoethyltrimethyl ammonium chloride (MTC)] and different modification method (cation-exchange reaction and grafting reaction), ultimately giving rise to five kinds of organomodified MMT (OMMT). The structure of the OMMT was studied by Wide angle X-ray diffraction (WAXD) and Fourier transform infrared spectroscopy (FTIR). Meanwhile, the structure of the PMMA/MMT nanocomposites microspheres was also investigated by WAXD. The molecular weight of the polymers extracted from PMMA/MMT nanocomposites was measured by gel permeation chromatograph (GPC). Finally, the mechanical properties of these PMMA/MMT nanocomposites were studied in detail. It was found that large interlayer spacing (d001) of OMMT could not entirely ensure an exfoliated structure of resultant PMMA/MMT nanocomposites, while OMMT with relative small d001 could still yield exfoliated structure as long as the compatibility between OMMT and polymer matrix was favorable. In addition, the results of mechanical investigation indicated that the compatibility between OMMT and PMMA matrix turned out to be the dominant factor deciding the final mechanical properties of PMMA/MMT nanocomposites. (C) 2014 Society of Plastics Engineers
机译：通过原位悬浮聚合制备了聚甲基丙烯酸甲酯（PMMA）/蒙脱土（MMT）纳米复合材料。 MMT之前已通过不同的改性剂[二十八烷基二甲基氯化铵（DODAC）和甲基丙烯酰基乙基三甲基氯化铵（MTC）]和不同的改性方法（阳离子交换反应和接枝反应）进行有机改性，最终产生了五种有机改性的MMT（OMMT） ）。通过广角X射线衍射（WAXD）和傅里叶变换红外光谱（FTIR）研究了OMMT的结构。同时，WAXD还研究了PMMA / MMT纳米复合材料微球的结构。从PMMA / MMT纳米复合材料中提取的聚合物的分子量通过凝胶渗透色谱仪（GPC）进行测量。最后，详细研究了这些PMMA / MMT纳米复合材料的力学性能。发现OMMT的较大层间间距（d001）不能完全确保所得PMMA / MMT纳米复合材料的剥离结构，而d001相对较小的OMMT仍然可以产生剥离结构，只要OMMT与聚合物基质之间的相容性良好即可。此外，机械研究的结果表明，OMMT和PMMA基质之间的相容性是决定PMMA / MMT纳米复合材料最终力学性能的主要因素。 （C）2014年塑料工程师学会

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