学术论文：高性能纤维热降解的研究–聚苯唑和对位芳纶纤维的应用

Study of the thermal degradation of high performance fibres—application to polybenzazole and p-aramid fibres

高性能纤维热降解的研究-聚苯唑和对位芳纶纤维的应用

作者：Bourbigot, Serge, Xavier Flambard, et Franck Poutch
发表：Polymer Degradation and Stability 74, no 2 (2001): 283 290. doi:10.1016/S0141-3910(01)00159-8

Abstract/摘要：

This work investigates the thermal degradation of high performance fibres. Poly-p-phenylenediamine-terephthalamide fibres (PPTA) and poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibres are examined when degrading in a furnace. Both gas and condensed phase are analysed. When degrading PPTA and PBO, CO, CO2 and H2O are detected by FTIR as major compounds composing the gas phase. As minor products, aromatic species, hydrocyanic acid (HCN) and ethylenic species are found (600 °C). Because of the higher thermal stability of PBO, their evolved amounts are always lower than those of PPTA and they are given off at much longer times. Moreover, no aromatic compound and a very low quantity of ethylenic species are detected in the gas phase suggesting they were involved in charring reactions. At 800 °C only nitric oxides are detected as minor products in the gas phase. A mechanism of formation of NOx from HCN is proposed. The investigation of the condensed phase by solid state NMR shows that PPTA and PBO are transformed into char when degrading. The char is composed of partially oxidised polyaromatic compounds, which can trap free radicals. It is suggested that the char structure of PBO may resist oxidation better than PPTA.

Keywords/关键词：

• Poly-p-phenylenediamine-terephthalamide;
• Poly(p-phenylene-2,6-benzobisoxazole);
• Zylon纤维;
• Kevlar;
• Thermal degradation 热降解;
• Charring 碳化;
• Gas phase 气相;
• Solid state NMR 固态核磁共振

⊕ 阻燃技术咨询请联系：0592-5056211 或者邮箱：info@ecosafene.com; contact@crepim.org

厦门易朔是CREPIM中国代表处，专注于防火安全的技术支持，提供本地化的服务和全球网络支持。法国防火材料研究中心CREPIM是欧洲最具知名度的防火安全研究专业机构，也是全球  5大防火研究机构之一，专注于防火安全的测试，认证，设计研发，培训等技术服务。特别是轨道交通领域和建材领域，我们具有法国认证认可委员会COFRAC,欧洲铁路认证局CERTIFIER认可，巴黎交通部RATP，法国铁路局SNCF, 欧盟公告机构2137，欧洲教育技术中心，欧洲司法鉴定等等权威资质认可。