中国塑料2024，Vol.38Issue(7)：9-14,6.DOI:10.19491/j.issn.1001-9278.2024.07.002
超声振动对玻璃纤维增强聚酰胺6注塑制件力学性能的影响
Effect of ultrasonic vibration on mechanical properties of injection-molded parts of glass-fiber-reinforced polyamide 6
摘要
Abstract
To improve the mechanical properties of fiber-reinforced thermoplastic composites,ultrasonic assisted injection molding experiments were carried out for rectangular flat parts based on polyamide 6(PA6)reinforced by glass fiber(GF).Ultrasonic vibration was applied in the following two situations:(1)filling stage,(2)filling and packing stages.X-ray diffraction,scanning electron microscopy,Fourier-transform infrared spectroscopy,and tensile experiments were performed to investigate the effects of ultrasonic application time and ultrasonic power on the crystallinity and mechanical performance of the parts,the orientation degree of glass fibers,and the bonding strength between glass fibers and the ma-trix.The changes in the internal crystallinity and mechanical properties of the parts subjected to ultrasonic vibration after water absorption were also studied.The results indicated that crystallinity of the parts was significantly improved by ap-plying ultrasonic vibration with a power of 400 W.When 560 W ultrasound was applied,both the orientation morpholo-gy of glass fiber and the bonding strength between the matrix and fibers were improved.Moreover,the tensile strength and bending strength of the parts molded by applying ultrasound during the filling stage were increased by 11.9%and 10.1%,respectively.However,the mechanical properties of the parts tended to drop with continuously increasing the ultrasonic power.After absorbing water,the parts showed a decrease in the crystallinity and mechanical properties.Such a reduction could be depressed by introducing ultrasonic vibration into the molding process of the parts.关键词
超声振动/玻璃纤维增强聚酰胺6/凝聚态结构/结晶度/力学性能Key words
ultrasonic vibration/glass-fiber-reinforced polyamide 6/condensed matter structure/crystallinity/mechanical property分类
化学化工引用本文复制引用
刘莹,孙昊,杨勇,姜开宇,于同敏,马赛,祝铁丽..超声振动对玻璃纤维增强聚酰胺6注塑制件力学性能的影响[J].中国塑料,2024,38(7):9-14,6.基金项目
国家重点研发计划项目(2022YFB3806203) （2022YFB3806203）
国家自然科学基金资助项目(52205339、51575080) （52205339、51575080）
