碳纤维含量对PMMA-PMA基复合材料显微结构及力学性能的影响(英文)

EFFECTS OF CARBON FIBER CONTENT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF PMMA-PMA BASED COMPOSITES

以甲基丙烯酸甲酯(polymethyl methacrylate,PMMA)和丙烯酸甲酯(polymethyl acrylate,PMA)为原料、短切碳纤维(Cf)为增强相,采用悬浮聚合法制备碳纤维增强聚甲基丙烯酸甲酯-聚丙烯酸甲酯基复合材料(carbon fiber-reinforced polymethyl methacrylate-polymethyl acrylate matrix composites,Cf/PMMA-PMA)。研究碳纤维含量(质量分数,下同)对Cf/PMMA-PMA显微结构及力学性能(抗折强度、抗压强度和拉伸强度)的影响。结果表明:随碳纤维含量增加,Cf/PMMA-PMA的挠度呈线性增长,而抗折强度、抗压强度和拉伸强度呈先增大后减小趋势。当碳纤维含量为15%时,Cf/PMMA-PMA的抗折强度、抗压强度和拉伸强度分别达到最大值115.5、244.6MPa和158.6MPa。

Carbon fiber-reinforced polymethyl methacrylate-polymethyl acrylate matrix composites（Cf/PMMA-PMA） were prepared by a suspension polymerization process using polymethyl methacrylate（PMMA） and polymethyl acrylate（PMA） as raw materials and short-cut carbon fiber as reinforced phase.The influences of carbon fiber content（in mass,the same below） on microstructure and mechanical properties,such as flexural strength,compressive strength and tensile strength of the Cf/PMMA-PMA,were investigated. The results show that with the increase of carbon fiber content,the deflection of the as-prepared composites increases linearly,while flexural strength,compressive strength and tensile strength of the as-prepared Cf/PMMA-PMA increase first and then decrease.When carbon fiber content reaches 15%,flexural strength,compressive strength and tensile strength of the Cf/PMMA-PMA reach the maximum value of 115.5,244.6 MPa and 158.6 MPa,respectively.