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- 2018
纳米SiO2/聚苯硫醚和SiO2-玻璃纤维/聚苯硫醚复合材料的性能
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Abstract:
利用纳米SiO2改性聚苯硫醚（PPS）树脂及玻璃纤维（GF）/PPS复合材料，探究纳米SiO2对PPS树脂及GF/PPS复合材料性能的影响规律。采用熔融共混工艺制备纳米SiO2/PPS树脂，并采用热压成型方法制备纳米SiO2-GF/PPS复合材料，利用SEM、DSC、DMA和力学测试表征不同纳米SiO2含量的SiO2/PPS和SiO2-GF/PPS复合材料。结果表明：纳米SiO2通过熔融共混工艺能够均匀分散在PPS基体中，并提高PPS结晶度和弯曲性能。添加1wt%纳米SiO2有效提高了GF/PPS复合材料的力学性能：层间剪切强度提高49.4%，弯曲强度提高30.6%，弯曲模量提高14.6%。纳米SiO2的添加可以提高GF/PPS复合材料的玻璃化转变温度，同时纳米SiO2能够改善树脂基体韧性并阻碍裂纹的扩展。 The nano SiO2/polyphenylene sulfide (PPS) and SiO2-glass fiber(GF)/PPS composite were prepared to investigate the effects of nano SiO2 on the properties of PPS and GF/PPS composites. Nano SiO2 was used to manufacture SiO2/PPS by melt blending and SiO2-GF/PPS by hot press molding, and effects were characterized by SEM, DSC, DMA and mechanical tests. The results show that the crystallinity and bending properties of PPS can be improved with nano SiO2 uniformly dispersing in the matrix by melt blending. The mechanical properties of SiO2-GF/PPS composite are significantly improved by adding 1wt% nano SiO2, the interlaminar shear strength increases by 49.4%, the flexural strength increases by 30.6%, and the flexural modulus increases by 14.6%. The addition of nano SiO2 can improve the glass transition temperature of GF/PPS composite, and the particle can also improve the toughness of resin matrix and hinder the growth of cracks.
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