【摘要】 用熔融共混法制备了玻璃纤维(GF)增强回收聚对苯二甲酸乙二醇酯(rPET)(rPET/GF)复合材料,研究了复合材料的力学性能并进一步利用Halpin-Tsai模型、Krenchel-COX模型和Kelly-Tyson模型探讨了GF的近程和远程结构与复合材料性能间的关系。结果表明,GF对rPET具有较为显著的增强、增韧效果。当玻璃纤维含量为30%(质量分数,下同)时,复合材料的冲击强度、拉伸强度以及弯曲强度分别提高了245%、113%和84%;长径比和取向度是影响rPET/GF复合材料性能的重要结构参数;Halpin-Tsai方程能够较好地描述rPET/GF复合材料中GF的有效长径比;而相比于Krenchel-COX方程,由Kelly-Tyson方程获得的GF的取向度更接近实验结果。更多还原

【Abstract】 Composites of recycled PET(rPET) filled with glass fiber(GF) were prepared via melt mixing.The mechanical properties of the rPET/GF composites were studied through various models including Halpin-Tsai,Krenchel-COX,and Kelly-Tyson equations,aiming at exploring the relations between the short-term and long-term structures of GF and the properties of the composites.It showed that the filled GF had evident reinforcing and toughening effects on the rPET.When the GF loading was 30 wt %,the toughness,tensile and bending strengths increased by about 245 wt %,113 wt %,and 84 wt %,respectively.The aspect ratio and the orientation of GF constituted two important structural parameters vital to the final properties of the composites.The Halpin-Tsai equation could be well used to describe aspect ratio of GF.The orientation factor of GF obtained from Kelly-Tyson equation was closer to the experimental value than that from Krenchel-COX equation.更多还原