Volume dependence of thermal conductivity and isothermal bulk modulus up to 1 GPa for poly(vinyl acetate)

✍ Scribed by S. Peter Andersson; Ove Andersson

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 225 KB
• Volume: 36
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/(sici)1099-0488(19980715)36:9<1451::aid-polb4>3.0.co;2-n

✦ Synopsis

The thermal conductivity l and heat capacity per unit volume of poly(vinyl acetate) (260 kg mol 01 in weight average molecular weight) have been measured in the temperature range 150-450 K at pressures up to 1 GPa using the transient hotwire method, which yielded l Å 0.19 W m 01 K 01 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 Å 4.0 GPa and (ÌK/Ìp) T Å 8.3. The volume data were used to calculate the volume dependence of l,

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%.