ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The devolatilization mechanism of polystyrene was studied by scanning electron microscopy. Strands of molten polystryene, containing 2,300 ppm styrene, and molten polystyrene containing 5% pentane, were extruded into a heated vacuum chamber. The strands were abruptly frozen, then fractured under liquid nitrogen and their morphology studied with scanning electron microscopy. A rich variety of morphological features in the core and on the surface of strands was discovered. These include micro- and miniblisters, fibrous structures, and crusty nodules on the inner surfaces of large macrobubbles. The source of these morphological features and their relevance to devolatilization is discussed.
Additional Material:
18 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690330514
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