固体火箭技术2011，Vol.34Issue(2)：247-251,5.
热氧老化对芳纶Ⅲ纤维结构与性能的影响
Effects of thermal-oxidative aging on structure and properties of aramid fiber Ⅲ
彭涛 1蔡仁钦 2王凤德 1叶光斗 2徐建军1
作者信息
- 1. 四川大学,高分子科学与工程学院,高分子材料工程国家重点实验室,成都,610065
- 2. 中蓝晨光化工研究院有限公司,成都,610041
- 折叠
摘要
Abstract
In order to prepare aramid fiber Ⅲ samples under different thermal-oxidative aging conditions, a series of thermal aging experiment was carried out at the temperatures of 230 ℃, 250 ℃, 270 ℃ and 300 ℃ with the high temperature oven. Single filaments tensile test and relevant structure analysis were implemented with the samples. Results of the single filaments tensile test show that the strength retention of aramid fiber decreases with the time going on as well as the temperature rising up. The TG and IR analysis shows that there's nearly no molecular structure change in the thermal-oxidative aging experiment. By wide angle X-ray scattering (WAXS) analysis, it is found that the aggregate structure changes with temperature rising under thermal-oxidative conditions. By the Scanning Electron Mieroecope ( SEM), it is proved that after thermal-oxidative experiment, the fracture morphology of the filaments changes from bond split failure to the brittle rupture. At last, combined with the model of aggregate structure of the aramid fiber, the reason why the tensile properties drop after thermo-oxidation aging and mechanism of fracture of the fiber was discussed.关键词
芳纶Ⅲ/热氧老化/结构/断裂形貌Key words
aromatic polyamide Ⅲ/ thermal aging/ structure/ fracture morphology分类
航空航天引用本文复制引用
彭涛,蔡仁钦,王凤德,叶光斗,徐建军..热氧老化对芳纶Ⅲ纤维结构与性能的影响[J].固体火箭技术,2011,34(2):247-251,5.
