Linear thermal expansivity

Polymer Thermal linear expansivity (10-= K-i) Specific heat capacity (kJkg-iK-i) Thermal conductivity (W m-i K-i)... 

The thermal linear expansivity of polymers is usually higher than that of ceramics and metals polymers have values ranging from 4 to 20 X 10 s K, whereas metals have values of about 1 to 3 X 10 5 K l. Further, the expansion of polymeric materials, unlike the expansion of metals, is usually not a linear function of temperature. 

In Table 6, we can see the average thermophysical properties of kerogenes as compared to the values of the same characteristics of thermoplasts. Thermophysical properties of processed compositions in the area of phase transitions are of prime importance. In Table 6, we can see the avera values of the corresponding thermal co-efficients at 100-150 °C. The data for polymers are cited from [69,70]. Assuming that there are no local thermal tensions in the melt, we can calculate the composition s thermal linear expansion coefficient by the additive equation [69,70] ... 

Y. S. Touloulkian, R. K. Kirby, R. E. Taylor and D. P. Desai, Thermodynamical Properties of Matter, Plenum Press, New York, 1975 p. 77. The coefficient of thermal volume expansion is taken to be three times the coefficient of thermal linear expansion. 

It has been known that the average coefficient of thermal linear expansion is equal to the relation of a sample length increment Al in temperature interval /, t2] to the size of this interval tr-t2. The average coefficient of linear expansion of RubCon was determined with a thermostat unit (Figure 2.12). 

Substance Molecular weight Average atomic weight Lattice ] parameters Density (A, room temp.) (g/cm ) Melting point (K) Microhard- ness, N/mm2 (M-Mohs Scale) Specific heat, J/kg-K (300 K) Debye ten. (K) Coefficient of thermal linear expansion [10 K 1 (300K)] Thermal conductivit [mW Icm-h (300K)]... 

Thermal (linear) expansion coefficient Solubility parameter Viscosity Melt strength... 

Tab. 4.1 Thermal linear expansion of palladium compared to Nb, Ta, V, Zr (a X 10 ) and thermal mismatch [(overlayer-substrate) / (substrate)] x 100%.

Average atomic Lattice parameters (A, Dendty Melting point Mkrtriiardness, N/nun (M- Speciflc heat. Debye temp. Coefficient of thermal linear expansion [lO- K- Thermal conductivity [mW/cm-K... 

Property a. Thermal conductivity b. Accommodation coefficient c. Thermal contact resistance d. Thermal diffusivity e. Specific heat f. Viscosity g. Emittance h. Reflectance i. Absorptance j. Transmittance k. ratio I. Prandtl number m. Diffusion coefficient n. Thermal linear expansion coefficient o. Thermal volumetric expansion coefficient p. Surface tension... 

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