混杂工艺对椰壳-大麻/聚丙烯复合材料力学性能的影响

Effects of hybrid process on mechanical properties of coir-hemp/polypropylene composites

采用正交分析法,讨论混杂工艺和复合工艺对椰壳-大麻/聚丙烯(PP)复合材料力学性能的影响。结果表明,混杂处理后的椰壳-大麻/PP复合材料的力学性能均比相同复合工艺条件下的大麻/PP复合材料有较大程度的改善。椰壳纤维与大麻纤维质量比对混杂椰壳-大麻/PP复合材料力学性能影响最大,且混杂椰壳-大麻/PP复合材料的力学性能随椰壳纤维含量的增加而线性增大;混杂针刺毡中PP纤维质量分数对混杂椰壳-大麻/PP复合材料的抗弯强度影响较大,最初混杂椰壳-大麻/PP复合材料的抗弯强度随PP纤维质量分数的增加而减小,随后又随PP纤维质量分数的增加有一定程度的增大,而混杂椰壳-大麻/PP复合材料的抗拉强度则随PP纤维质量分数的增大而线性减小;混杂椰壳-大麻/PP复合材料的力学性能随复合层压温度的升高呈下降趋势。

The influence of the hybrid process and the composite process on the mechanical properties of hybrid coir-hemp/polypropylene(PP)composites was discussed by orthogonal analysis.The results show that the mechanical properties of hybrid coir-hemp/PP composites after hybrid treatment are greatly improved compared with that of hemp/PP composites under the same composite conditions.The mass ratio between coir fiber and hemp fiber has the greatest influence on the mechanical properties of hybrid coir-hemp/PP composites,and the mechanical properties of the hybrid coir-hemp/PP composites increase linearly with the increase of the coir fiber content;the mass fraction of PP fiber in reinforced needle-punched felt has great influence on the flexural strength of the hybrid coir-hemp/PP composites.The bending strength of the hybrid coir-hemp/PP composites decreases with the increase of the PP fiber content on the initial,and then increases with the increase of PP fiber content,while the tensile strength of the hybrid coir-hemp/PP composites decreases linearly with the increases of PP fiber.The mechanical properties of the hybrid coir-hemp/PP composites decrease with the increase of the composite lamination temperature.