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Title: | An evaluation of the pressure-dependent melt viscosity of polyphenylsulfone | ||||||||||
Author: | Sedláček, Tomáš; Hausnerová, Berenika; Filip, Petr | ||||||||||
Document type: | Peer-reviewed article (English) | ||||||||||
Source document: | Polymer Engineering and Science. 2014, vol. 54, issue 3, p. 711-715 | ||||||||||
ISSN: | 0032-3888 (Sherpa/RoMEO, JCR) | ||||||||||
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DOI: | https://doi.org/10.1002/pen.23604 | ||||||||||
Abstract: | A method for the determination of pressure-affected viscosity from capillary rheometry and pressure-volume-temperature (PVT) data was tested on polyphenylsulfone melt. Shear viscosity data evaluated at selected temperatures (345-375°C) were interlinked to the PVT data at pressures ranging from 1 to 200 MPa. According to the recently proposed correlation approach, a pressure-dependent shear viscosity is derived from the relationship (verified on several commodity polymers) between temperature-dependent viscosity and a free volume parameter computed using the Simha-Somcynsky equation of state. Finally, the predicted pressure-viscosity coefficient was compared with the value obtained experimentally on a modified single piston rheometer. POLYM. ENG. SCI., 54:711-715, 2014. © 2013 Society of Plastics Engineers. | ||||||||||
Full text: | http://onlinelibrary.wiley.com/doi/10.1002/pen.23604/abstract | ||||||||||
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