航空材料学报2025，Vol.45Issue(3)：52-60,9.DOI:10.11868/j.issn.1005-5053.2025.000066
国产T800/聚芳醚酮热塑性复合材料在湿热环境中的老化行为
Aging behavior of T800/polyaryletherketone(PAEK)thermoplastic composites in hygrothermal environments
摘要
Abstract
This study investigates the performance evolution of T800/polyaryletherketone(PAEK)thermoplastic composites subjected to hygrothermal aging conditions.By meticulously controlling the cooling rate,two distinct types of carbon fiber-reinforced PAEK composites with varying crystallinities are prepared:CF/PAEK-CL(low crystallinity)and CF/PAEK-CH(high crystallinity).These composites are then systematically examined for their moisture absorption behavior,thermal properties,and mechanical performance in hygrothermal environments.Experimental results reveal that the water absorption of CF/PAEK composites increases progressively over time,with CF/PAEK-CL exhibiting a notably higher moisture uptake rate due to its lower crystallinity.Following hygrothermal aging,the glass transition temperature(Tg)of all samples decreases,with CF/PAEK-CL experiencing a specific reduction of approximately 5%.Thermal analysis further indicates that hygrothermal aging has a negligible impact on the crystallinity of the materials,and notably,the high-crystallinity composite demonstrates superior thermal stability in such environments.Flexural testing results demonstrate that hygrothermal aging has a limited influence on the flexural strength and modulus of CF/PAEK composites,underscoring their robust resistance to the detrimental effects of hygrothermal conditions on flexural mechanical properties.This resilience ensures their long-term stability and reliability in harsh environments.The findings of this study offer pivotal data and theoretical insights,paving the way for the application of CF/PAEK composites in demanding service conditions.关键词
湿热老化/碳纤维/聚芳醚酮/热性能/力学性能/结晶度Key words
hydrothermal aging/carbon fiber/polyaryletherketone(PAEK)/thermal properties/mechanical properties/crystallinity引用本文复制引用
杨宏茹,王成博,刘刚,张代军,陈春海,姚佳楠..国产T800/聚芳醚酮热塑性复合材料在湿热环境中的老化行为[J].航空材料学报,2025,45(3):52-60,9.基金项目
国家重点研发计划基金项目(2022YFB3709401) （2022YFB3709401）
