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首页> 外文期刊>Polymers & Polymer Composites >Polystyrene-Organoclay Nanocomposites Prepared via in-situ Emulsion Polymerization
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Polystyrene-Organoclay Nanocomposites Prepared via in-situ Emulsion Polymerization

机译：通过原位乳液聚合制备的聚苯乙烯-有机粘土纳米复合材料

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In this study, polystyrene-clay nanocomposites (PSNC's) were prepared via in-situ bulk and in-situ emulsion polymerization. The effect of organoclay and the architecture of surfactant were investigated. For the investigation of the effect of surfactant, organoclays were synthesized containing clay modifiers having different structures. Trimethylhexadecyl ammonium chloride, dimethylbenzylhexadecyl ammonium chloride and dimethylbenzyl(4-vinyl) hexadecyl ammonium chloride, which is synthesized in laboratory, modified clays were synthesized. Pristine polystyrene (PS) was synthesized by bulk and emulsion polymerization for comparison, and PSNC's containing 3 wt.% organoclays were prepared by both these polymerization methods. Structural analysis of synthesized surfactant was identified by Nuclear Magnetic Resonance (NMR) Spectrometer. The interlayer spacing of silicate layers and the morphology of samples were examined by using the X-ray Diffraction (XRD) Spectrometer and Scanning Electron Microscopy (SEM) images, respectively.Thermal properties of nanocomposites were determined by Thermogravimetric analyzer (TGA) and Differential Scanning Calorimeter (DSC). It is observed that organoclays and PS were compatible to each other and each organoclay could form a nanocomposite structure with PS. PSNC's exhibited better properties than pristine PS. Nanocomposites prepared by in-situ emulsion polymerization resulted with better thermal properties and higher interlayer distances than that prepared by in-situ bulk polymerization. In order to improve some properties of PS such as thermal stability, preparation of PSNC's by in-situ emulsion polymerization has been suggested.
机译：在这项研究中，聚苯乙烯-粘土纳米复合材料（PSNC's）是通过原位本体和原位乳液聚合制备的。研究了有机粘土的作用和表面活性剂的结构。为了研究表面活性剂的作用，合成了含有具有不同结构的粘土改性剂的有机粘土。在实验室合成了三甲基十六烷基氯化铵，二甲基苄基十六烷基氯化铵和二甲基苄基（4-乙烯基）十六烷基氯化铵，合成了改性粘土。为了进行比较，通过本体聚合和乳液聚合合成了原始聚苯乙烯（PS），并且通过这两种聚合方法均制备了含有3 wt％有机粘土的PSNC。通过核磁共振（NMR）光谱仪鉴定合成的表面活性剂的结构分析。分别通过X射线衍射（XRD）和扫描电子显微镜（SEM）图像检查了硅酸盐层的层间距和样品的形貌。通过热重分析仪（TGA）和差示扫描法确定了纳米复合材料的热性能。量热仪（DSC）。观察到有机粘土和PS彼此相容，并且每种有机粘土都可以与PS形成纳米复合结构。 PSNC具有比原始PS更好的性能。通过原位乳液聚合制备的纳米复合材料比通过原位本体聚合制备的纳米复合材料具有更好的热性能和更高的层间距离。为了改善PS的某些性能，例如热稳定性，已经提出了通过原位乳液聚合制备PSNC的方法。

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