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TitleInduction time for cold crystallization in semi-rigid polymers: PEN and PEEK
Author(s)Nogales, A.
Ezquerra, T. A.
Denchev, Z.
Baltá-Calleja, F. J.
KeywordsSemi-rigid polymers
Cold crystallization
X-ray scattering
Issue date2001
PublisherElsevier Science
Citation"Polymer". 42 (2001) 5711-5715.
Abstract(s)The appearance of long range density fluctuations in two isotropic semi-rigid polymers (PEN and PEEK), during the induction period prior to crystallization, when heating above the glass transition temperature, Tg, has been demonstrated by simultaneous wide- and small-angle X-ray scattering techniques. The parallel use of dielectric spectroscopy, to characterize the segmental dynamics of the amorphous polymers polymer above Tg, and of X-ray scattering, to estimate the induction period for cold crystallization, reveals that segmental mobility of the supercooled melt is a key factor in controlling the development of the pre-crystalline nanostructures.
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AccessRestricted access (UMinho)
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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