碳纤维经编织物定型参数及渗透特性

Packifier parameters and permeability characteristics of non-crimp stitched carbon fabrics

研究了真空辅助树脂注射(VARI)工艺中含定型剂织物定型参数对织物压缩特性、渗透特性及其复合材料力学性能的影响,确定织物最优的定型参数。采用DSC和IR分别对织物表面定型剂的熔融特性和组成进行了分析,测试了不同定型温度下的压缩、渗透特性及复合材料力学性能。结果表明:此定型剂为含有环氧基团的低熔点聚合物;低于100℃时,随着定型温度的升高,织物的压缩厚度和渗透率均下降;100～140℃时,随着定型温度的升高,织物的压缩厚度基本无变化,渗透率有所提高,定型温度对力学性能基本无影响。

In order to choose the best parameters of tackifier in vacuum assisted resin infusion（VARI） processing, the effects of tackifier on perform permeability, fiber compression and mechanical performance were addressed. The component of tackifier and its melting characteristics were ananlyzed by DSC and IR. The perform permeability, fiber compression characteristics and mechanical performance at different temperatures were examined. It is shown that the tackfier is a kind of polymer with epoxide group and Iow melting point. For the same tackifier concentration, the perform permeability and compressed thickness decrease as the temperature increasing below 100 ℃, but between 100 ℃ and 140 ℃, the compressed thickness keeps constant and the permeability increases as the temperature increasing. The temperature has no significant effect on the mechanical properties.