Stresses and volume changes in a polymer loaded axially in a rigid die

Pressure-volume-temperature properties and free volume parameters of PEO/PMMA blends

“…9,10 Small cylindrical samples (M 9 1 5 mm) high-pressure piston-type dilatometers. 46,47 Most of the PVT data were analyzed using the evaluawere then molded at 185ЊC and 200 kN and cooled to room temperature at ca. 20ЊC/min in a Fontijne tion software PVTEVAL from Gnomix Inc. 45 press TP200.…”

PVT measurement methodology for semicrystalline polymers to simulate injection-molding process

“…Considering a purely elastic material in the solid state, Lei et al 4 compared the decreasing of a specific volume with a pressure increase from the atmospheric pressure up to a pressure, P, measured both with the piston tech-nique (⌬V pist ) and in a hydrostatic condition (⌬V hydro ). They obtained the expression of the ra-…”

Precise measurement of the PVT of polypropylene and polycarbonate up to 330�C and 200 MPa

“…The present work has modified the apparatus to elevate the maximum the method is simple, a leakage of the polymer may occur through a gap between the piston and temperature up to 350ЊC. To do this, the influence of temperature, pressure, and the length of the the cylinder if the polymer is in a melt state, and the pressure is not hydrostatic 6 if the polymer bellows on the inner volume of the dilatometer was investigated in detail, comparing measured solidifies by crystallization or glass formation. For these reasons, the piston method may not be ade-PVT properties of mercury and water with reliable literature values.…”