The effect of processing parameters on the fabrication of auxetic extruded polypropylene films | Zendy

Chirima G. | Zendy; Ravirala N. | Zendy; Rawal A. | Zendy; Simkins V. R. | Zendy; Alderson A. | Zendy; Alderson K. L. | Zendy

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The effect of processing parameters on the fabrication of auxetic extruded polypropylene films

Author(s) -

Chirima G.,

Ravirala N.,

Rawal A.,

Simkins V. R.,

Alderson A.,

Alderson K. L.

Publication year - 2008

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200880251

Subject(s) - polypropylene , auxetics , poisson distribution , fabrication , poisson's ratio , materials science , extrusion , composite material , mathematics , statistics , medicine , alternative medicine , pathology

A processing parameter study for extruded polypropylene films has been carried out. Films were extruded at temperatures varying from 157 °C to 230 °C, screw speed from 0.525 rad s –1 to 2.10 rad s –1 and take up speed from 0.0225 m s –1 to 0.15 m s –1 . Characterisation of the films was undertaken to determine Poisson's ratio, ν , using video exten‐ sometry and it was found that it was possible to vary the Poisson's ratio from positive ( ν = +0.4) to negative (as low as ν = –1) by varying the processing parameters, allowing the possibility of tailoring the Poisson's ratio to specified applications driven values. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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