Characterization of strain-induced crystallization of poly(ethylene terephthalate) at fast draw rates using synchrotron radiation
1996; Elsevier BV; Volume: 37; Issue: 15 Linguagem: Inglês
10.1016/0032-3861(96)88476-x
ISSN1873-2291
AutoresD.J. Blundell, D. MacKerron, W. Fuller, A. Mahendrasingam, C. Martin, R. J. Oldman, R. J. Rule, Christian Riekel,
Tópico(s)biodegradable polymer synthesis and properties
ResumoStructural changes during fast drawing of poly(ethylene terephthalate) were studied by wide-angle X-ray scattering using synchrotron radiation. Drawing was studied at 80, 90, 100 and 110°C to a final draw ratio of ∼4:1 at a draw rate of ∼ 10s−1. Simultaneous video recording of the sample enabled variation in the X-ray pattern to be correlated with local extension. Essentially all oriented crystallization occurred after final extension. Primary crystallization fits a first-order transformation with little change in the rate of crystallization observed over the 30°C range of temperature. These results show that it can be misleading to rely on crystallinity information obtained when samples from interrupted draw experiments are quenched.
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