石墨烯/聚醚砜和PIF加工对PPS性能影响

Effects of Graphene/Polyethersulfone and PIF Processing on Properties of PPS

采用熔融挤出微型注塑方法制备了不同聚醚砜含量的石墨烯-聚醚砜-聚苯硫醚(PPS)复合材料,并通过对复合材料进行压力诱导流动成型(PIF),研究了聚醚砜含量和压力诱导流动成型对复合材料力学性能、微观结构和结晶的影响。结果表明:聚醚砜可以提高复合材料的冲击和拉伸性能,诱导PPS结晶促进成核,加速结晶作用。压力诱导流动可以使聚醚砜在聚苯硫醚基体中由球棒状变成扁平状,有效地起到增韧效果,提高了复合材料的力学性能。当聚醚砜的质量分数为30%时,复合材料冲击强度提高大约42%,拉伸强度提高11%。

Graphene-polyethersulfone-polyphenylene sulfide(PPS)composites with different polyethersulfone contents were prepared by melt extrusion micro-injection method,and pressure-induced flow forming(PIF)was applied to the composites.The effects of polyethersulfone content and PIF on the mechanical properties,microstructure and crystallization of the composites were investigated.The results show that polyethersulfone can improve the impact and tensile properties of the composite,and induce PPS crystallization to promote nucleation and accelerate crystallization.The PIF can make the polyethersulfone change from a bat to a flat shape in the PPS matrix,effectively enhancing the toughening effect and improving the mechanical properties of the composite.When the mass fraction of polyethersulfone is 30%,the impact strength of the composites is increased by about 42%,and the tensile strength is increased by 11%.