摘要
采用热塑性聚酰亚胺膜熔渗法,制备了单向玻璃纤维/嵌段共聚聚酰亚胺膜层压复合材料,考察了嵌段共聚聚酰亚胺的理论分子量、嵌段比(由BPDA段含量表示)对复合材料力学性能的影响。结果表明,分子量和嵌段比能显著影响嵌段共聚聚酰亚胺的分子链柔性,复合材料的弯曲强度、弯曲模量、层间剪切强度和冲击强度均随理论分子量的增大或刚性段含量的增加呈现出先增加后降低的趋势,最大弯曲强度、最大弯曲模量、最大层间剪切强度和最大冲击强度分别达到1224.52MPa、31.82GPa、70.56MPa和447.55kJ/m2。
Unidirectional glass fiber reinforced block-copolyimide composites were prepared by the film laminated molding method. The mechanical properties of these composites varied with the theoretical molecular weights and the ratio of BPDA. It could be concluded that the mechanical properties of composites could be improved through the increases in molecular flexibilities which were induced by the changes of theoretical molecular weights and the ratios of BPDA. In these series of composites, the biggest flexural strength and the highest flexural modulus were respectively 1224.52MPa and 31.82GPa while the biggest ILSS and the highest impact strength were respectively 70.56MPa and 447.55kJ/m^2.
出处
《塑料》
CAS
CSCD
北大核心
2006年第6期1-5,70,共6页
Plastics
关键词
嵌段共聚
玻璃纤维
复合材料
力学性能
block-copolymerization
glass fiber
composites
mechanical properties
