An evaluation of the pressure‐dependent melt viscosity of polyphenylsulfone | Zendy

Sedlacek Tomas | Zendy; Hausnerova Berenika | Zendy; Filip Petr | Zendy

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An evaluation of the pressure‐dependent melt viscosity of polyphenylsulfone

Author(s) -

Sedlacek Tomas,

Hausnerova Berenika,

Filip Petr

Publication year - 2014

Publication title -

polymer engineering and science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 111

eISSN - 1548-2634

pISSN - 0032-3888

DOI - 10.1002/pen.23604

Subject(s) - rheometry , materials science , viscosity , thermodynamics , rheometer , viscometer , volume (thermodynamics) , relative viscosity , reduced viscosity , shear rate , viscosity index , polymer , composite material , rheology , physics , scanning electron microscope , base oil

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

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