A Combined Analysis of PVT and Rheological Measurements: Novel Results for Three Amorphous Polymers
✍ Scribed by Mercedes Fernández; María Eugenia Muñoz; Anton Santamaría
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 219 KB
- Volume
- 209
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
The fractional free volume f of polycarbonate (PC), polystyrene (PS) and poly(methyl methacrylate) (PMMA) is determined by pressure–volume–temperature (PVT) measurements using the Simha–Somcynsky equation of state. Results are compared with the free volume obtained by viscoelastic measurements. Temperature and pressure dependent viscosity and free volume results are correlated using the characteristic ratio C~∞~ and the parameter B of the monomeric friction factor ζ = __ζ__exp B/f. This leads to obtain new results on the temperature and pressure dependence of C~∞~, as well as on the pressure dependence of B parameter.
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