Mohammad Golzar - Assistance Professor of Mechanical Engineering Manufacturing Engineering Group Tarbiat modares university
Naser Sadeghian - Msc. Student Manufacturing Engineering Group Tarbiat modares university

In present paper, PVT (Pressure, specific Volume and Temperature) properties of plastic materials in pure and solution are reviewed. The PVT measurements are mainly investigated for thermoplastic composites melt such as Wood-Plastic Composites (WPC). The PVT properties aided two methods are carried out using online measurement: One method is using a capillary die and the second one is using a gear pump in xtrusion line. The measurements can be used in extrusion line and die design. Rheology behavior of melt state of WPCs is studied in order to use the viscosity is to estimate the specific volume. Results show good agreement between two methods and can be used for other polymeric composites. Also, WPCs density in solid state achieves by rule of mixture and theatric data and measured values have good agreement. Finally compressibility and volume thermal expansions of WPCs can be achieved for Tait Equations

PVT, WPC, Volume flow rate, Capillary die, gear pump