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Structure and properties of a poly(amino ether) resin after reprocessing in the melt state
Author(s) -
Granado A.,
Eguiazábal J. I.,
Nazábal J.
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23293
Subject(s) - materials science , extrusion , polymer chemistry , ether , viscosity , melt flow index , solubility , yield (engineering) , chemical engineering , grafting , composite material , chemistry , polymer , organic chemistry , engineering , copolymer
Abstract The effects of reprocessing by extrusion for up to five cycles, at both the usual (200°C) and an extreme (230°C) temperature, on the structure and mechanical properties of a poly(amino ether) (PAE) resin were studied. A slight darkening and viscosity increase was observed, mainly upon reprocessing at 230°C. The melt flow index and solubility analysis indicated that grafting and crosslinking reactions took place, respectively, after reprocessing at 200 and 230°C. The Young′s modulus and the yield stress of PAE increased slightly with successive extrusion cycles. This was attributed to the viscosity‐induced increase in orientation, and to a minor extent to the partially grafted/crosslinked nature of the samples. The decrease in the ductility was more noticeable in the samples reprocessed at 230°C, and was attributed to the reduced ability to elongate of partially grafted and partially crosslinked structures present after reprocessing, respectively, at 200 and 230°C. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1368–1373, 2006