热处理对玻璃纤维布/聚苯硫醚非织造布复合板材力学性能的影响

以玻璃纤维布和聚苯硫醚（PPS）非织造布分别作为增强体和树脂基体原料，采用热压成型法制备出玻璃纤维布/PPS非织造布复合板材，然后在烘箱中进行热处理。利用万能试验机（Instron）、XRD、偏光显微镜（PLM）和SEM等手段对玻璃纤维布/PPS非织造布复合板材的力学性能、结晶度、晶粒类型和尺寸及微观形貌等进行了测试和表征。结果表明：随着热处理温度和时间的提高，玻璃纤维布/PPS非织造布复合板材的弯曲强度、弯曲模量和缺口冲击强度得到明显提高。当热处理温度为220℃、热处理时间为2 h时，其力学性能最佳，其弯曲强度、弯曲模量和缺口冲击强度分别达到285.7 MPa、7.8 GPa和85.0 MPa。和未进行热处理的玻璃纤维布/PPS非织造布复合板材相比，分别提高了63.2%、469.0%和37.8%。微观形貌结果表明，玻璃纤维布/PPS非织造布复合板材界面粘结得到了明显改善。

Effects of heat treatment on the mechanical properties of glass fiber cloth/polyphenylene sulfide nonwoven composite boards

Using the cloth of glass fiber and nonwovens of polyphenylene sulfide (PPS) as reinforcement and matrix, the glass fiber cloth/PPS nonwoven composite boards were prepared by hot pressing which were put in the oven for heat treatment. The mechanical properties, crystallinity, type and size of grain and micro morphology of glass fiber cloth/PPS nonwoven composite boards were tested and characterized by Instron, XRD, polarizing microscope(PLM) and SEM. The results show that the bending strength, flexural modulus and notched impact strength of the composite board are obviously improved with the increase of the temperature and time of heat treatment. When the temperature of heat treatment is 220℃ and the time of heat treatment is 2 h, the mechanical properties of the composite board are the best. The bending strength, flexural modulus and notched impact strength are 285.7 MPa, 7.8 GPa and 85.0 MPa, respectively, increased by 63.2%, 469.0% and 37.8%, compared with those without heat treatment. The micro morphologies of the glass fiber cloth/PPS nonwoven composite boards show that the interfacial adhesion has been greatly improved.