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首页> 外文期刊>Polymers & Polymer Composites >Mechanical and Thermal Properties of Nano-Composites of Polyvinyl Chloride)and Co-Poly(Vinyl Chloride-Vinyl Alcohol-Vinyl Acetate)with Montmorillonite
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Mechanical and Thermal Properties of Nano-Composites of Polyvinyl Chloride)and Co-Poly(Vinyl Chloride-Vinyl Alcohol-Vinyl Acetate)with Montmorillonite

机译：蒙脱土与聚氯乙烯-乙烯基醇-乙酸乙烯酯的纳米复合材料的力学性能和热性能

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摘要

Nano-composites of poly(vinyl chloride)and co-poly(vinyl chloride-vinyl alcohol-vinyl acetate)with clay were prepared by the solution intercalation method.Montmorillonite,a three-layered clay mineral consisting of silicate sheets,was employed as reinforcing phase.Compatibilisation between the two phases was achieved by intercalation of montmorillonite with dodecylamine to increase the organophilicity of the clay.Thin films of pure polymers and their composite materials containing various proportions of clay were obtained by evaporation of the solvent.After further drying under vacuum,these films were characterised for their mechanical and thermal properties.The results have shown that the modulus and the tensile strength of the composite films increased initially compared to the pure polymers and then decreased upon further addition of the clay.The glass transition temperature of the films,measured from the maxima of the tan8 curves using dynamic mechanical thermal analysis,showed a greater shift towards higher temperatures in copolymer-clay than in PVC-clay films.This is indicative of a higher degree of interaction between the two phases of copolymer-clay composites than PVC-clay composites.The microhardness values and the decomposition temperatures also increased in both systems with the addition of an appropriate amount of the clay.
机译：通过溶液插层法制备了聚（氯乙烯）和共聚（氯乙烯-乙烯醇-乙酸乙烯酯）与粘土的纳米复合材料。以硅酸盐片组成的三层粘土矿物蒙脱土为补强剂。通过将蒙脱石与十二烷基胺插层以增加粘土的亲有机性，可实现两相之间的相容性。通过蒸发溶剂获得纯聚合物及其复合材料的薄膜，其中包含不同比例的粘土，并在真空下进一步干燥结果表明，与纯聚合物相比，复合膜的模量和拉伸强度开始增加，而在进一步添加粘土后降低。使用动态机械热分析从tan8曲线的最大值测量的薄膜显示出与PVC-粘土薄膜相比，噬菌体向着更高的温度转变，这表明共聚物-粘土复合材料的两相之间的相互作用程度高于PVC-粘土复合材料。两种体系都添加了适量的粘土。

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