Heat resistance properties of poly(p-phenylene-2,6-benzobisoxazole) fiber

✍ Scribed by Tadao Kuroki; Yoshikazu Tanaka; Toshiaki Hokudoh; Kazuyuki Yabuki

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 210 KB
• Volume: 65
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970801)65:5<1031::aid-app21>3.0.co;2-3

✦ Synopsis

The high temperature properties of Poly( p-phenylene-2,6-benzobisoxazole) (PBO) fiber are examined and compared with those of the p-Aramid fiber. In particular, the temperature dependence of tensile strength of the PBO fiber is reported for the first time. The PBO fiber has 100ЊC higher decomposition temperature than the p-Aramid fiber, and the amount of toxic gases in combustion is much smaller than the p-Aramid fiber. Although the relative strength decreased proportionally in the range of room temperature to 500ЊC, the PBO fiber has 40% of the strength at room temperature even at a temperature of 500ЊC. After thermal treatment at 500ЊC for 60 s, the PBO fiber retained 90% of its original strength. The PBO fiber is expected to substitute for asbestos, which is still used as a heat resistant cushion material.