Effects of process conditions on the dissolution of carbon dioxide in PS in foaming extruders

Document Type

Article

Publication Date

1-1-2001

Abstract

The effects of the main processing conditions on the dissolution behavior of CO2 in polystyrene melt were studied using a novel in-line method in connection with both single and twin-screw foaming extruders. Apparent solubility data obtained from the twin-screw extrusion experiments showed better consistency compared with those obtained from the single screw experiments, indicating the importance of enhanced mixing in affecting the gas dissolution and solubility behavior during an extrusion foaming process. Gas dissolution inside a twin-screw foaming extruder was further studied for CO2 in the polystyrene melt. The measured gas up-take was compared with the values calculated assuming equilibrium conditions in the gas injection zone in an effort to elucidate possible mechanisms for gas dissolution inside a foaming extruder during the actual foaming process.

Identifier

0034774630 (Scopus)

Publication Title

International Polymer Processing

External Full Text Location

https://doi.org/10.3139/217.1648

ISSN

0930777X

First Page

223

Last Page

228

Issue

3

Volume

16

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