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High‐resolution thermogravimetry of poly(2,6‐dimethyl‐1,4‐phenylene oxide)
Author(s) -
Li XinGui
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990314)71:11<1887::aid-app19>3.0.co;2-8
Subject(s) - thermogravimetry , activation energy , thermostability , nitrogen , degradation (telecommunications) , materials science , oxide , kinetics , analytical chemistry (journal) , thermal analysis , phenylene , polymer chemistry , chemical engineering , nuclear chemistry , thermal , chemistry , organic chemistry , composite material , polymer , inorganic chemistry , thermodynamics , engineering , metallurgy , enzyme , telecommunications , physics , quantum mechanics , computer science
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 −1 , 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 −1 , 0.5, and 13–17 min −1 , respectively. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 1887–1892, 1999