The development and use of a novel design of apparatus for the evaluation of pressure-density-temperature relationships for molten polymers are presented in this paper. The experimental method allows the determination of the pressure-density-temperature characteristics at high pressure (up to 1000 Bar) and temperature (up to 250°C) as appropriate. The data generated are compared with direct measurements made on an injection moulding machine. Three-dimensional relationship plots between pressure, density and temperature of the molten polyethylene can be constructed.
WiegmannT. and OehmkeF., SPE ANTEC '91, Vol. 37 (1991) 1646.
7.
LeiM., ReidC.G. and ZollerP., Polymer, Vol. 29, (1988) 1784.
8.
ZhenhkaS., SongM. and ZutongY., Polymer, Vol. 33 (1992) 328.
9.
FakhreddineY.A. and ZollerP., SPE ANTEC '91, Vol. 37 (1991) 1642.
10.
HearnE.J., “Mechanics of Materials: An Introduction to the Elastic and Plastic Deformation of Solids and Structural Components” Volume 1, 2nd Edition, Pergamon Press, Birmingham, (1985).
