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本文研究了经80℃热水老化2600小时的短碳纤维和玻璃纤维混杂增强尼龙1010复合材料的性能与结构变化,并对复合材料中的纤维长度分布进行了统计。 研究表明,纤维长度减小主要发生在挤出造粒阶段。碳纤维与玻璃纤维的长度分布差异不大。混杂增强的尼龙1010复合材料在许多力学性能和摩擦磨损行为上表现出正的“混杂效应”。热水老化后仍然存在这种情况。 热水老化使尼龙1010的分子量降解,降解率随玻璃纤维含量增加而增大。老化使尼龙1010晶粒增大,但并无形成球晶。热水老化后复合材料的力学性能保留率随玻璃纤维含量增加而下降。热水老化使玻璃纤维与尼龙1010之间的界面粘结受到严重破坏,界面剪切强度严重下降。碳纤维与尼龙的界面粘结所受的破坏轻一些。
In this paper, the properties and structural changes of nylon 1010 composites reinforced by short carbon fiber and glass fiber hybrid heated at 80 ℃ for 2,600 hours were studied. The fiber length distribution in the composites was also studied. The research shows that the decrease of fiber length occurs mainly in the extrusion granulation stage. Carbon fiber and glass fiber length distribution of little difference. Hybrid reinforced nylon 1010 composites show positive “confounding effects” on many mechanical properties and tribological behavior. This is still the case after hot water is aged. The aging of hot water degraded the molecular weight of nylon 1010, and the degradation rate increased with the increase of glass fiber content. Aging makes nylon 1010 grains bigger, but no spherulites formed. The retention of mechanical properties of composites after hot water aging decreases with the increase of glass fiber content. Hot water aging makes the glass fiber and nylon 1010 interfacial adhesion was severely damaged, a serious decline in the interface shear strength. Carbon fiber and nylon interface bonding suffered less damage.