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The preparation of ultra‐high modulus polypropylene films and fibres
Author(s) -
Cansfield D. L. M.,
Capaccio G.,
Ward I. M.
Publication year - 1976
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760161102
Subject(s) - materials science , polypropylene , composite material , modulus , polyethylene , polymer , young's modulus , thermal , linear low density polyethylene , thermodynamics , physics
Following the discovery that linear polyethylene can be drawn to very high draw ratios to produce oriented fibres and films with ultra‐high initial moduli, a similar study has been undertaken for polypropylene. In particular, the modulus/draw ratio relationship has been obtained for a range of polymers of different molecular weight and molecular weight distribution. The effects of thermal history and draw temperature were studied, and it was shown that under optimum conditions material with an initial modulus at room temperature of 1.9 × 10 10 Nm −2 (205 gdtex, 3 × 10 6 psi) can be obtained. This value is at least 50 percent greater than those previously recorded for drawn fibres and about one half of the theoretical modulus.