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Dynamic mechanical behavior of poly(aryl ether ether ketone) in the −150°C to +100°C temperature range: Influence of the nature of sorbed solvents
Author(s) -
Bas C.,
Alberola N. D.
Publication year - 1996
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10409
Subject(s) - peek , ether , solvent , materials science , aryl , methanol , ketone , crystallization , polymer chemistry , glass transition , molecule , ethanol , chemical engineering , organic chemistry , chemistry , composite material , polymer , alkyl , engineering
The dynamic mechanical behavior of poly(aryl ether ether ketone) (PEEK) films submitted to various treatments, i.e. physical aging, crystallization, and immersion in various solvents (water and some alcohols), has been investigated at low temperatures in order to give new insights on the origin of the subglass transitions. Two processes, i.e., the simple thermorheological component at lower temperatures and the cooperative component at higher temperatures, are overlapped in the β relaxation of dry PEEK. Sorbtion of such solvent molecules as water, ethanol, methanol, and isopropanol gives rise to new relaxations.