Suspension-like hardening behavior of HDPE and time-hardening superposition

P.C. Roozemond, V. Janssens, P.C.J. Puyvelde, van, G.W.M. Peters

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)


The rheology of solidifying high-density polyethylene (HDPE) is investigated. Experiments on an HDPE were performed with a novel RheoDSC device. Results agree quantitatively with simulations for a suspension of elastic spheres in a viscoelastic matrix except for very low values of space filling (<5%), indicating that the rheological behavior of the crystallizing melt in the frequency range investigated is purely suspension-like. The hardening behavior of the material is characterized in two different ways; a normalized rheological function and a time-hardening superposition (THS) master curve of rheological properties. An improvement is proposed to the procedure for performing THS that was previously used in the literature. Based on this procedure, a novel method for predicting the rheological properties of crystallizing melts is presented.
Original languageEnglish
Pages (from-to)97-109
Number of pages13
JournalRheologica Acta
Issue number2
Publication statusPublished - 2012


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