IN-LINE MEASUREMENT OF GAS SOLUBILITY IN POLYSTYRENE AND POLYETHYLENE TEREPHTHALATE MELTS DURING FOAM EXTRUSION

Document Type

Conference Proceeding

Publication Date

1-1-1998

Abstract

In this paper, a new in-line method was used to directly measure the gas solubility in polymer melts during foam extrusion. Metered quantities of polymer and specific gases were blended in a single screw extruder which is capable of producing polymeric foams of variable density. A specially designed optical window and flow restrictor valve placed between the die and the end of the extruder were used to generate dynamic solubility data by observing the onset of bubble formation/dissolution at the window through a microscope-CCD cameramonitor/ recorder system. Solubility data were determined for systems involving nitrogen, argon and carbon dioxide in polystyrene and polyethylene terephthalate at different temperatures. Good agreement with literature data on the PS-CO2 system was obtained.

Identifier

0003208992 (Scopus)

ISBN

[9780791816028]

Publication Title

ASME International Mechanical Engineering Congress and Exposition Proceedings Imece

External Full Text Location

https://doi.org/10.1115/IMECE1998-0927

First Page

75

Last Page

83

Volume

1998-V

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