Melting of polymers

  • Cefn Blundell

Student thesis: Doctoral ThesisDoctor of Philosophy


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.
Date of AwardOct 1974
Original languageEnglish
SupervisorA.J. Lovett (Supervisor), M.C. Jones (Supervisor) & G.S. Learmouth (Supervisor)


  • Melting
  • polymers

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