聚丙烯/氧化石墨烯(PP/GO)复合材料的制备及性能

通过原位聚合法制备了聚丙烯/氧化石墨烯(PP/GO)复合材料,并以此为母料与聚丙烯溶液共混,制备了不同氧化石墨烯含量的PP/GO复合材料,研究了GO对复合材料力学性能、电性能及热性能的影响。力学性能测试发现,石墨烯能显著提高复合材料的刚性,同时,使其韧性降低。当GO的含量为2.5%时,复合材料的弹性模量和拉伸强度分别提高了700%和82%,而断裂伸长率降低了93%。电性能测试结果发现,PP/GO的渗流阈值为1.5%,在此含量条件下,复合材料的电导能达到10^-2S/m,与PP相比,提高了11个数量级;同时,PP/GO的快速降解温度也提高了250℃。

Preparation and Properties of Polypropylene/Graphene Oxide(PP/GO) Nanocomposite

Polypropylene/graphene (PP/GO) nanocomposite was prepared by in-situ polymerization, and PP/GO composite with different GO content were prepared by solution blending of PP and PP/GO as stated above. The effects of GO on mechanical, electrical and thermal properties of composite were studied. The mechanical properties test found that GO could significantly improve the rigidity of the composite material while reducing the toughness. When the content of GO was 2. 5%, the elastic modulus and tensile strength of the composite increased by 700% and 82%, respectively, but the elongation at break decreased by 93%. The electrical properties test results showed that the percolation threshold of PP/GO was 1. 5%, at which the conductivity of the composite could reach to 10^-2 S/m, which was 11 orders of magnitude higher than that of PP. The rapid degradation temperature of PP/GO was 250℃ higher than that of PP.