| Autor: |
Borovikov, A. A., Khlybov, G. N., Yakushin, M. I. |
| Zdroj: |
Journal of Applied Mechanics and Technical Physics; July 1974, Vol. 15 Issue: 4 p516-520, 5p |
| Abstrakt: |
When considering thermal decomposition of thermoplastics by a-thermal flux, the case wherein radiation is the dominant heat-transfer mechanism is of special interest. The temperature field within the decomposing material is then described by equations of thermal conductivity and radiation transfer, for the solution of which a knowledge of the thermophysical and optical properties of the material over wide wavelength and temperature ranges is necessary. This present study is devoted to an examination of the optical properties of teflon, a crystalline polymer. Measurement of the true coefficient of absorption of highly dispersive media, including teflon, presents certain difficulties, so in the present case spectral reflection and transmission coefficients were measured, and scattering and absorption coefficients were calculated using the theory of multiple scattering. Measurements were made over the wavelength range 0.2–2.5 µ at temperatures of 20–400 °C. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink