Melting of polymers


The project set out to investigate the relative effectiveness of thermal conductive heating (from external resistance heaters) and viscous heating in the heating (and melting) of low density polyethylene. A model system was used in order to simplify the mathematical analysis. A theory was developed to describe both processes in the model apparatus. The results showed large differences between the experimental and predicted results at low melt temperatures (the predicted results were much greater than the experimental) . Analysis of the results indicated that the apparatus was probably not producing the required shear rates in the sample. The theory appeared to be satisfactory, in that it did not over estimate the viscous heating to any significant extent. The theoretical results could therefore be considered to be a reasonable estimate of the viscous heating.

Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
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Institution: Aston University
Uncontrolled Keywords: Melting,polymers
Last Modified: 08 Dec 2023 08:03
Date Deposited: 13 Jan 2011 11:30
Completed Date: 1974-10
Authors: Blundell, Cefn


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