The Pyrolytic Decomposition of Owens-Illinois Resin Gr650, an Organosilicon Compound
| العنوان: | The Pyrolytic Decomposition of Owens-Illinois Resin Gr650, an Organosilicon Compound |
|---|---|
| المؤلفون: | B. G. Bagley, W. E. Quinn, L. J. Amos, P. K. Gallagher |
| المصدر: | MRS Proceedings. 32 |
| بيانات النشر: | Springer Science and Business Media LLC, 1984. |
| سنة النشر: | 1984 |
| مصطلحات موضوعية: | Thermogravimetry, Materials science, Evolved gas analysis, Analytical chemistry, Infrared spectroscopy, Pyrolytic carbon, Atmospheric temperature range, Composite material, Glass transition, Pyrolysis, Isothermal process |
| الوصف: | The pyrolytic conversion of an organosilsesquioxane (Owens-Illinois resin GR650) to SiO2 is characterized by ir spectroscopy, thermogravimetry and evolved gas analysis (line-of-sight mass spectroscopy). Scanning calorimetry, ramping at 10°C/min, on the as-received (room temperature annealed) resin indicates a glass transition temperature of 67°C which decreases to 58°C for an unrelaxed sample. The ir spectra have bands which can be assigned to Si-CH3 and Si-O-Si modes. For 30 minute isothermal anneals at temperatures above 420°C there is a continuous decrease in the bands associated with the Si-CH3 groups such that after 30 minutes at 650°C the ir spectrum has evolved to that for SiO2. Evolved gas analysis indicates that there are four major components evolving. Over the temperature range (ramping at 10°C/min) ∼180 to ∼500°C we observe C2H5OH and H2O, both of which are condensation reaction products from the curing reaction. Methane is a major evolving species over the temperature range ∼500 to ∼800°C and the thermal spectrum is double peaked which we attribute to CH3+ bound to the inside and outside of the polymer cage structures. The final major component detected was H2, over the temperature range ∼600 to ∼1100°C, which was attributed to pyrolysis of the organic components, both trapped and evolving. The features of the weight loss curve can be accounted for by the measured evolving species spectra. |
| تدمد: | 1946-4274 0272-9172 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::75469c040b423b0b77871af97ed49931Test https://doi.org/10.1557/proc-32-287Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........75469c040b423b0b77871af97ed49931 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19464274 02729172 |
|---|