成型工艺对玄武岩纤维增强PPS夹芯结构材料力学性能影响

Effect of Forming Technology on Mechanical Properties of Basalt Fiber Reinforced Polyphenylene Sulfide Sandwich Structural Materials

夹芯结构材料具备质量轻、刚性高、功能综合型等优点,广泛应用于航天航空、交通运输、功能材料等领域。为研究成型工艺对夹芯结构材料性能的影响,以玄武岩纤维增强聚苯硫醚复合材料、连续玻璃纤维增强聚丙烯单向预浸带为原材料,探究了模压成型工艺中贴合压力、热压温度、热压时间以及芯层材料密度等因素对夹芯结构材料性能的影响。结果表明,模压成型工艺中热压温度和热压时间的最优条件为220℃,15 min;芯层材料的密度减小时,其弯曲性能、冲击强度呈先增大后下降的趋势,弯曲强度和弯曲弹性模量最大为271.53 MPa,18672.72 MPa,冲击强度最大为119.21 kJ/m^(2)。芯层材料的密度减小时,其弯曲刚度呈上升趋势,最大弯曲刚度可达15441.16 N·mm。

Sandwich structure material has the advantages of light weight,high rigidity and comprehensive function,which is widely used in aerospace,transportation,functional materials and other fields.In order to study the effect of molding process on the properties of sandwich structural materials,the basalt fiber reinforced polyphenylene sulfide composites and continuous glass fiber reinforced polypropylene unidirectional prepreg strip were used as raw materials.The influences of bonding pressure,hot pressing temperature,hot pressing time and core layer material density on the properties of sandwich structure materials were investigated.The results show that the optimal conditions of hot pressing temperature and hot pressing time in the molding process are 220℃and 15 min。When the density of the core material decreases,the bending property and impact strength increase first and then decrease.The maximum bending strength and modulus are 271.53 MPa and 18672.72 MPa,and the maximum impact strength is 119.21 kJ/m^(2).When the density of core layer material decreases,its bending stiffness increases,and the maximum bending stiffness can reach 15441.16 N·mm.