Catalogue


Scale-Up of Extrusion Foaming Process for Manufacture of Polystyrene Foams Using Carbon Dioxide.
Zhang, Hongtao.
imprint
2010.
description
138 leaves.
ISBN
9780494725900
format(s)
Microform, Thesis
Holdings
Subjects
More Details
imprint
2010.
isbn
9780494725900
restrictions
Electronic version licensed for access by U. of T. users.
dissertation note
Thesis (M.A.Sc.)--University of Toronto, 2010.
general note
Source: Masters Abstracts International, Volume: 49-05, page: .
local note
ROBARTS MICROTEXT copy on microfiche.
abstract
An initial evaluation of the scalability of extrusion foaming technology is conducted in this thesis. Both lab- and pilot-scale foam extrusion systems along with annular dies and flat dies were used to investigate the effects of extrusion system scale on the foam expansion. The effects of the processing conditions including die temperature and blowing agent content on the volume expansion of extruded polystyrene foams blown with carbon dioxide are presented. A systematic comparison of the effects of extrusion system scale on the expansion behavior of polystyrene foams blown with carbon dioxide at the consistent pressure-drop rate, demonstrated that the scale of the foam extrusion system does not affect the principles of the foaming process, and the effects of extrusion system size on the scale-up of foam techniques, such as shear rate and temperature uniformity, could be suppressed by tailoring the processing conditions and experimental parameters.
catalogue key
7878812

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