Effect of pressure on the PVT behaviour of iPP as revealed by dilatometric measurements

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Isotactic Poly-propylene samples, previously prepared under known conditions of pressure and cooling rate by means of a special apparatus designed and set-up by the authors, were subjected to several isobaric runs at low cooling and heating rate in a confining fluid dilatometer (by GNOMIX). The effect of the previous thermo-mechanical histories and the effect of pressure in the dilatometry on specific volume of the samples was studied. Results show that the initial specific volume depends upon the previous thermo-mechanical histories, which however cancels out after the first heating run. Moreover the reported dilatometric experimental data support the evidence that an increase of pressure at a constant cooling rate acts as an increase of cooling rate at a constant pressure. © Springer-Verlag 2002.
Lingua originaleEnglish
pagine (da-a)159-164
Numero di pagine6
RivistaPolymer Bulletin
Stato di pubblicazionePublished - 2002

All Science Journal Classification (ASJC) codes

  • ???subjectarea.asjc.1600.1600???
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

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