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Lookup NU author(s): Professor Kamelia Boodhoo,
Dr Roshan Jachuck
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It has been observed that when a prepolymer mix of styrene, poly(styrene), toluene, and benzoyl peroxide is transferred from a conventional stirred tank reactor (STR) to a spinning disc reactor (SDR), the rate of polymerization is substantially increased. Furthermore, the molecular weight and the molecular weight distribution of the polymer formed at conversions up to about 80% in the SDR is virtually unchanged from that of the polymer formed at 60% conversion in the STR. These results seem to indicate that the increase in polymerization rate is not the result of the well-known Trommsdorff-Norrish effect, which would be expected to lead to an increase in poly-dispersity. We believe that shear and centrifugal forces experienced by the film provide intense mixing and extension flow effects, which are responsible for the above-described observations. In this report an explanation has been put forward to describe the observed effects.
Author(s): Jachuck RJ; Boodhoo KVK; Dunk WAE
Publication type: Article
Publication status: Published
Journal: Journal of Applied Polymer Science
ISSN (print): 0021-8995
ISSN (electronic): 1097-4628
Publisher: John Wiley & Sons, Inc.
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