ISSN:
0887-6266
Keywords:
bulk modulus
;
heat capacity
;
high-pressure
;
poly(vinyl acetate)
;
thermal conductivity
;
transient hot-wire method
;
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The thermal conductivity λ and heat capacity per unit volume of poly(vinyl acetate) (260 kg mol-1 in weight average molecular weight) have been measured in the temperature range 150-450 K at pressures up to 1 GPa using the transient hot-wire method, which yielded λ = 0.19 W m-1 K-1 at atmospheric pressure and room temperature. The bulk modulus K has been measured in the temperature range 150-353 K up to 1 GPa. At atmospheric pressure and room temperature, K = 4.0 GPa and (∂K/∂p)T = 8.3. The volume data were used to calculate the volume dependence of λ, \documentclass{article}\pagestyle{empty}\begin{document}$g = - \left( {\frac{{\partial \lambda /\lambda }}{{\partial V/V}}} \right)_T .$\end{document} The values for g of the liquid and glassy states were 3.0 and 2.7, respectively, and g of the latter was almost independent of volume and temperature. Theoretical models can predict the value for g of the glassy state to within 25%. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 1451-1463, 1998
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
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