The Brill transition in transcrystalline nylon-66

A. Y. Feldman; E. Wachtel; G. B.M. Vaughan; A. Weinberg; G. Marom

doi:10.1021/ma060487h

The Brill transition in transcrystalline nylon-66

A. Y. Feldman^*, E. Wachtel, G. B.M. Vaughan, A. Weinberg, G. Marom

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

The Brill transition in transcrystalline nylon-66 occurs at a temperature that is 15 K higher than in the parent spherulitic nylon-66. This difference is assigned to the high level of crystalline orientation and chain packing order in the former. The similarity of the influence of the orientated morphology on the Brill transition and on the glass transition is pointed out, suggesting that the Brill transition, which is inherently a first-order process, comprises a second-order element. Utilizing the brightness of the synchrotron microbeam WAXD to make in situ diffraction measurements during relatively rapid heating and by running two consecutive cycles at different heating rates, the activation energy for the Brill process is derived for the first time. The values of 77 and 28 kJ/mol are calculated for transcrystalline and spherulitic nylon-66, respectively.

Original language	English
Pages (from-to)	4455-4459
Number of pages	5
Journal	Macromolecules
Volume	39
Issue number	13
DOIs	https://doi.org/10.1021/ma060487h
State	Published - 27 Jun 2006

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AU - Feldman, A. Y.

AU - Wachtel, E.

AU - Vaughan, G. B.M.

AU - Weinberg, A.

AU - Marom, G.

PY - 2006/6/27

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AB - The Brill transition in transcrystalline nylon-66 occurs at a temperature that is 15 K higher than in the parent spherulitic nylon-66. This difference is assigned to the high level of crystalline orientation and chain packing order in the former. The similarity of the influence of the orientated morphology on the Brill transition and on the glass transition is pointed out, suggesting that the Brill transition, which is inherently a first-order process, comprises a second-order element. Utilizing the brightness of the synchrotron microbeam WAXD to make in situ diffraction measurements during relatively rapid heating and by running two consecutive cycles at different heating rates, the activation energy for the Brill process is derived for the first time. The values of 77 and 28 kJ/mol are calculated for transcrystalline and spherulitic nylon-66, respectively.

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The Brill transition in transcrystalline nylon-66

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