Thermal degradation of aged polytetrahydrofuran and its copolymers with 3-azidomethyl-3′-methyloxetane and 3-nitratomethyl-3′-methyloxetane by thermogravimetry
✍ Scribed by T. C. Chang; K. H. Wu; H. B. Chen; S. Y. Ho; Y. S. Chiu
- Book ID
- 102658700
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 549 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0887-624X
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✦ Synopsis
The thermal decomposition behavior of the aged tetrahydrofuran copolymers with 3-azidomethyl-3'-methyloxetane (AMMO) or 3-nitratomethyl-3'-methyloxetane (NMMO) were studied by thermogravimetry and evolved gas analysis, and compared with aged polytetrahydrofuran (poly-THF). The thermal stability decreased in the order poly-THF > poly-AMMO-THF-AMMO > poly-NMMO-THF-NMMO, whereas the range of temperature for decomposition increased in the order poly-THF < poly-AMMO-THF-AMMO < poly-NMMO-THF-NMMO. The apparent activation energies of the degradation for polymers with ageing, calculated by the Ozawa method, were smaller than that without ageing.