连续纤维增强聚醚砜复合材料制备及性能研究

PREPARATION AND PROPERTIES OF CONTINUOUS FIBER REINFORCED POLYETHERSULFONE COMPOSITES

碳纤维增强热塑性树脂基复合材料由于具有轻质、高强、加工周期短、可回收循环使用等优异性能逐渐受到航空航天、汽车工业等多个领域的关注,也成为未来复合材料增材制造的重要发展方向。本文以高性能热塑性树脂聚醚砜(PES)为基体,通过溶液浸渍-相转化法制备树脂含量可控,柔韧性好,有可能用于三维编织和自动铺放成型的热塑性预浸纱。将其经过热压成型制成单向带试样,与常用环氧树脂及其复合材料热性能和力学性能进行对比。研究发现PES基复合材料具有优异的耐热性能,其热分解温度(T5%)为576℃,800℃残碳率(N2)为90%,其单向带纵向拉伸强度可达1781 MPa,拉伸模量为60.17 GPa,虽然略低于相同树脂含量的环氧树脂基复合材料,但PES基复合材料是一种很有发展潜力的高性能热塑性复合材料。

Carbon fiber reinforced thermoplastic resin-based composite materials have been paid more and more attention in many fields such as aerospace and automotive industries due to their excellent performances such as light weight,high strength,short processing cycle and recyclable recycling.They have also become important developments in future composite additive manufacturing direction.In order to solve the problems of high energy consumption and difficult solvent removal in the preparation of composite prepreg by solution method,solvent volatilization causes environmental pollution and harm to human health,this paper uses high performance thermoplastic resin polyethersulfone(PES).As a substrate,the solution is removed by a solution dipping-phase transformation method at a normal temperature to remove the solvent at a normal temperature,and the method is energy-saving and environmentally friendly.Thermoplastic prepreg yarns with controlled resin content,good flexibility,and possibility for three-dimensional weaving and automatic placement molding are prepared by solution impregnation-phase transformation.It is thermoformed into an unidirectional tape sample,which is compared with the thermal properties and mechanical properties of common epoxy resins and their composite materials.It is found that the PES-based composite material has excellent heat resistance.Its thermal decomposition temperature(T5%)is 576℃,the residual carbon ratio(N2)at 800℃is 90%,and the longitudinal tensile strength of the unidirectional belt can reach 1781 MPa.The tensile modulus is 60.17 GPa.Although it is slightly lower than the epoxy resin matrix composite of the same resin content,but the PES-based composite material is a high-performance thermoplastic composite material with great development potential.