研究學(xué)術(shù)成果
解決方案
學(xué)術(shù)論文：高性能纖維熱降解的研究-聚苯唑和對(duì)位芳綸纖維的應(yīng)用
Study of the thermal degradation of high performance fibres—application to polybenzazole and p-aramid fibres
高性能纖維熱降解的研究-聚苯唑和對(duì)位芳綸纖維的應(yīng)用
作者：Bourbigot, Serge, Xavier Flambard, et Franck Poutch
發(fā)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/關(guān)鍵詞：
Poly-p-phenylenediamine-terephthalamide;
Poly(p-phenylene-2,6-benzobisoxazole);
Zylon纖維;
Kevlar;
Thermal degradation 熱降解;
Charring 碳化;
Gas phase 氣相;
Solid state NMR 固態(tài)核磁共振
⊕ 阻燃技術(shù)咨詢(xún)請(qǐng)聯(lián)系：0592-5056211 或者郵箱：info@ecosafene.com; contact@crepim.org
廈門(mén)易朔是CREPIM中國(guó)代表處，專(zhuān)注于防火安全的技術(shù)支持，提供本地化的服務(wù)和全球網(wǎng)絡(luò)支持。法國(guó)防火材料研究中心CREPIM是歐洲最具知名度的防火安全研究專(zhuān)業(yè)機(jī)構(gòu)，也是全球 5大防火研究機(jī)構(gòu)之一，專(zhuān)注于防火安全的測(cè)試，認(rèn)證，設(shè)計(jì)研發(fā)，培訓(xùn)等技術(shù)服務(wù)。特別是軌道交通領(lǐng)域和建材領(lǐng)域，我們具有法國(guó)認(rèn)證認(rèn)可委員會(huì)COFRAC,歐洲鐵路認(rèn)證局CERTIFIER認(rèn)可，巴黎交通部RATP，法國(guó)鐵路局SNCF, 歐盟公告機(jī)構(gòu)2137，歐洲教育技術(shù)中心，歐洲司法鑒定等等權(quán)威資質(zhì)認(rèn)可。
----------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------
