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Molecular analysis of the crystallization behavior of poly(aryl-ether-ether-ketone)

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1002/polb.1986.090240510
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FormatText, Article
Abstract
The crystallization behavior, via annealing, of PEEK was investigated using FTIR spectroscopy. It was found that predominantly amorphous PEEK (e.g., quenched polymer) follows two distinct mechanisms when it is annealed. One is a lower energy relaxation process that involves the partial rotation of the ether linkages, allowing the molecular chains in the disordered phase to become better packed, and occurs from 50 to 140°C (slightly below Tg). This relaxation process is also observed by dynamic mechanical analyses. The other process is a crystallization that takes place above the glass transition, with its onset characterized by the rotation of the benzophenone linkages near Tg. Isothermal crystallization kinetics data on PEEK can be described by an Avrami equation with an Avrami constant n of about 1.
Publication date
PublisherWiley
In
  • Journal of Polymer Science Part B: Polymer Physics 24, no. 5: 1079–1091.
LanguageEnglish
Peer reviewedYes
NRC publication
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"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NRC numberCNRC 26568
NRC-IGM85-205-411
NPARC number23004010
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Record identifier03282378-7456-4df2-9e70-5255575b3e25
Record created2018-09-17
Record modified2020-03-17
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