复合材料科学与工程Issue(8)：33-42,65,11.DOI:10.19936/j.cnki.2096-8000.20250828.005
芳纶Ⅲ纸基复合材料的热氧老化特性研究
Study on the thermal-oxidative aging characteristics of aramid Ⅲ paper-based composites
摘要
Abstract
In this paper,aramid Ⅲ paper base paper was obtained by wet forming with aramid Ⅲ staple fiber and meta-aramid fibrid,and then the aramidⅢpaper base composite was obtained by impregnating polyimide res-in,and then the aging experiments were carried out at 250℃,300℃and 350℃.The physicochemical structure,mechanical properties and dynamic mechanical properties of Fang Ⅲ paper before and after aging were described.The results show that the chemical structure of arylⅢpaper has no obvious change before and after aging at 250℃and 300℃,and the amide bond breaks before and after aging at 350℃.For the physical structure of paper,with the increase of aging time and aging temperature,the quality loss and size loss of aromatic Ⅲ paper gradually be-come larger,and the paper surface defects such as holes and cracks appear.After aging at 250℃for 408 h,the tensile strength and tear strength retention rates of Fang Ⅲ paper were 111%and 115%,respectively.After 312 h aging at 300℃,the tensile strength and tear retention rate of aromatic Ⅲ paper decreased to 53%and 23%,re-spectively.After aging at 350℃for 168 h,the tensile strength retention rate of aromaticⅢpaper was only 4%,the tear retention rate decreased to 14%after aging for 48 h,and decreased to 0 after 168 h.DMA shows that the loss factor transition temperature of aromaticⅢpaper increases gradually with the increase of aging time at 300℃,indi-cating that the molecular segment softness and viscosity of aromatic Ⅲ paper increase significantly at 300℃.关键词
芳纶Ⅲ短切纤维/芳纶Ⅲ原纸/纸基复合材料/热氧老化/力学性能Key words
aramid Ⅲ staple fiber/aramid Ⅲ paper base paper/paper base composite/thermal and oxidative aging/mechanical properties分类
通用工业技术引用本文复制引用
姚运振,廖思锽,张正,龙金,王宜,熊志远,胡健..芳纶Ⅲ纸基复合材料的热氧老化特性研究[J].复合材料科学与工程,2025,(8):33-42,65,11.基金项目
国家重点研发计划(2021YFB3700104) （2021YFB3700104）
