摘要
对Kevlar纤维进行了改性,使其成为己内酰胺阴离子开环聚合的活性中心,采用阴离子接枝法在Kevlar纤维(KF)表面接枝尼龙6低聚物,并与基体尼龙6混合,用挤出和注塑方式制备了尼龙6/改性Kevlar纤维(PA6/KF1)复合材料。ESEM和XPS分析表明,Kevlar纤维表面接枝上了尼龙6低聚物。比较了尼龙6/未改性Kevlar纤维(PA6/KF0)和PA6/KF1复合材料的力学性能及破坏形态,同时探讨了其破坏机理。结果表明,接枝尼龙6的KF1增强了KF与尼龙6复合材料界面的相互作用,拉伸强度、弯曲强度和弯曲模量分别提高了20.69%、12.26%和14.23%,但冲击强度降低了8.2%;当复合材料被破坏时,未改性纤维表面只粘附有少量的树脂尼龙6,而改性纤维的表面有较多的树脂包覆层,呈部分非界面脱粘破坏,具有良好的界面结合能力。
Kevlar fiber was modified by Kevlar fiber（PA6/KF1 ） composites were means of the anionic graft of nylon prepared by extrusion and injection measurements proved that the nylon 6 oligomer was properties, fracture morphologies and fracture compared and studied. After being treated, the 6 oligomer. Nylon 6/modified process. Both ESEM and XPS grafted onto the surface of Kevlar fiber. The mechanical mechanism of PA6/KF0 and PA6/KF1 composites were composites＇ tensile strength, flexural strength and flexural modulus were increased by 20. 69%, 12. 26% and 14.23% respectively, however, the impact strength declined by 8.2%. The adhesive nylon 6 on the PA6/KF1 composites was more than that on the PA6/KF0 composites when the composites were destroyed, and the failure morphology of PA6/KF1 composites was non- interfacial destruction.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第12期1373-1376,共4页
Chinese Journal of Applied Chemistry
基金
福建省自然科学基金(E0410013)资助项目
福建省科技计划重点项目(2004H015)
