Effect of orientation on the sorption of toluene by high density polyethylene

Samples of a blown high density polyethylene (HDPE) film with high orientation in machine direction were treated at 34, 74 and 114°C for different periods of time. The crystallinity and birefringence of these samples, as well as the sorption curves with toluene vapor, were determined as a function o...

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Bibliographic Details
Published in:Journal of membrane science 1984-01, Vol.21 (3), p.333-342
Main Authors: Bischoff, M., Eyerer, P.
Format: Article
Language:English
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Summary:Samples of a blown high density polyethylene (HDPE) film with high orientation in machine direction were treated at 34, 74 and 114°C for different periods of time. The crystallinity and birefringence of these samples, as well as the sorption curves with toluene vapor, were determined as a function of the treatment temperature and time. The sorption curves showed that the diffusion behaviour of the oriented samples was non-Fickian. The annealing of the samples resulted in a decay of the orientation and a change of the diffusion mechanism. The latter was manifested by the decrease of the exponent n which describes the time dependence of the solvent uptake in the equation: M(t)/M∞ = k t n .
ISSN:0376-7388
1873-3123
DOI:10.1016/S0376-7388(00)80223-9