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High-resolution thermogravimetry of poly(2,6-dimethyl-1,4-phenylene oxide)

✍ Scribed by Xin-Gui Li

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 192 KB
Volume: 71
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19990314)71:11<1887::aid-app19>3.0.co;2-8

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✦ Synopsis

The thermal degradation and kinetics of poly(2,6-dimethylphenylene oxide) (PPO) were studied by high-resolution thermogravimetry. The thermogravimetry measurements were conducted at an initial heating rate of 50°C min Ϫ1 , resolution 4.0, and sensitivity 1.0 in both nitrogen and air from room temperature to 900°C. A two-step degradation process was clearly revealed in air at the temperatures of 430°C and 521°C. The thermal degradation temperatures and kinetic parameters of the PPO appear to be higher in air than in nitrogen, indicative of a higher thermostability in air. The temperature, activation energy, order, and frequency factor of the thermal degradation of the PPO in nitrogen are 419°C, 100 -120 kJ mol Ϫ1 , 0.5, and 13-17 min Ϫ1 , respectively.

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