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通过溶液共混法制备了氧化石墨烯(GO)分散均匀的聚氯乙烯(PVC)/GO纳米复合薄膜,研究了薄膜的力学性能和热稳定性能。结果表明,微量GO能大幅度提高PVC的模量和拉伸强度,且保持较高的断裂伸长率。在PVC中添加质量分数为0.12%的GO,PVC的拉伸强度提高63%,杨氏模量提高20%;添加量为0.60%时,PVC的拉伸强度提高125%,杨氏模量提高126%.添加GO还能提高PVC的起始分解温度、最大分解温度以及PVC的成碳量。GO片层具有较高的强度和模量、GO在高分子基体内的均匀分散、GO和PVC之间较强的相互作用、GO与PVC的层状结构,是其力学性能提高的主要原因.
Polyvinyl chloride (PVC) / GO nanocomposite films with uniform dispersion of graphene oxide (GO) were prepared by solution blending method. The mechanical properties and thermal stability of the films were investigated. The results show that the micro-GO can greatly improve the modulus and tensile strength of PVC, and maintain a high elongation at break. The tensile strength of PVC is increased by 63% and the Young’s modulus is increased by 20% when the mass fraction of GO is 0.12%. The tensile strength of PVC is increased by 125% and the Young’s modulus is increased 126%. Adding GO can also improve the initial decomposition temperature of PVC, the maximum decomposition temperature and the amount of carbon into the PVC. The higher strength and modulus of GO sheet, the uniform dispersion of GO in the polymer matrix, the strong interaction between GO and PVC, and the lamellar structure of GO and PVC are the main reasons for the improvement of mechanical properties.