Relationship between the energy supply parameters and the physicochemical l characteristics of polymer compositions during drying and thermal processing |
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Authors: | L S Slobodkin G P Pshenichnaya M N Barskaya |
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Affiliation: | (1) A. V. Lykov Institute of Heat and Mass Transfer, Academy of Sciences of the B. SSR, Minsk |
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Abstract: | The effect of the type of energy supply on the formation of temperature and concentration fields in the thermal processing of polymer compositions is considered.Notation T0, T
initial and current temperature of the coating
- Tm
temperature of the air
- =(T-To)/(Tm-T0)
dimensionless temperature of the coating
- a
thermal diffusivity
- A
absorption power of the coating
- D
diffusion coefficient
-
thermal conductivity
- c
thermal capacity
-
density
- k
convective heat transfer coefficient
- i
number of moles of reacting groups per unit volume of polymer
- K0
factor in front of the exponential
- R
gas constant
- u
concentration
- Q
thermal effect of the reaction
- qn
density of the incident radiant flux
-
=x/
dimensionless coordinate over the thickness of the coating
- Ki=Aqn
/(Tm-T0)
Kirpichev criterion characterizing the thermal effect of the reaction
- Kip=Qi/c (Tm-T0)
analog of the Predvoditelev criterion, characterizing the rate of occurrence of a chemical excess in the system
- Bu=
Bouguer criterion
- Lu=D/a
Lykov number
- Fo=a/2
Fourier number
- Bi=
k
Biot number
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 39, No. 1, pp. 26–33, July, 1980. |
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Keywords: | |
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