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Poly(vinyl chloride)/TiO_2 nanocomposite resin via the synthesis of TiO_2 nanoparticles in vinyl chloride followed by in situ suspension polymerization

机译：通过在氯乙烯中合成TiO_2纳米粒子，然后进行原位悬浮聚合，制备聚氯乙烯/ TiO_2纳米复合树脂

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摘要

There are various methods established and implemented to prepare polymer/TiO_2 nanocomposites, but the choice of preparation method is limited in the case of most frequently used commodity polymers because of their enormous production and low price. In situ suspension polymerization is rarely reported, because suspension is a severe condition to maintain the dispersion of nanoparticles in monomer phase. However, not only the incorporation of nanoparticle but also the preservation of morphology and processing condition can be attained if in situ suspension polymerization is achieved in the polymer resins mainly produced by suspension polymerization such as PVC. In this study, we prepared PVC/TiO_2 nanocomposite resin via the synthesis of highly dispersible TiO_2 nanoparticles in the vinyl chloride, followed by in situ suspension polymerization of vinyl chloride which contained the nanoparticles. Solvothermal method is applied to the nanoparticle preparation, and the prepared TiO_2 nanoparticles have controlled sizes, shapes, and crystalline phases with the types and concentrations of precursor and oxygen donor. The film samples from prepared PVC/TiO_2 nanocomposites resins are highly transparent due to the minimized visible light scattering which is an evidence of high dispersity of TiO_2 nanoparticles.
机译：建立和实施了多种制备聚合物/ TiO_2纳米复合材料的方法，但是对于最常用的商品聚合物，其制备方法的选择受到限制，因为它们的生产量大且价格低廉。原位悬浮聚合很少报道，因为悬浮是维持纳米颗粒在单体相中分散的严格条件。然而，如果在主要由悬浮聚合生产的聚合物树脂如PVC中实现了原位悬浮聚合，则不仅可以引入纳米颗粒，而且可以保持形态和加工条件。在这项研究中，我们通过在氯乙烯中合成高度分散的TiO_2纳米粒子，然后原位悬浮包含纳米粒子的氯乙烯，制备了PVC / TiO_2纳米复合树脂。溶剂热法应用于纳米粒子的制备，所制备的TiO_2纳米粒子具有可控的尺寸，形状和晶相，且具有前驱体和氧供体的类型和浓度。制备的PVC / TiO_2纳米复合树脂薄膜样品由于可见光散射最小而具有很高的透明度，这是TiO_2纳米颗粒具有高分散性的证据。

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