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Biphasic compatible blends from injection‐molded poly(ether ether ketone)/polysulfone
Author(s) -
Arzak A.,
Eguiazábal J. I.,
Nazábal J.
Publication year - 1997
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/(sici)1097-4628(19970822)65:8<1503::aid-app7>3.0.co;2-k
Subject(s) - differential scanning calorimetry , ether , polysulfone , materials science , hildebrand solubility parameter , miscibility , scanning electron microscope , polymer chemistry , solubility , ketone , composite material , polymer , chemistry , organic chemistry , thermodynamics , physics
Poly(ether ether ketone)/polysulfone blends were obtained by direct injection molding throughout the composition range. The almost full immiscibility and biphasic nature of these blends was seen by differential scanning calorimetry and dynamic‐mechanical thermal analysis and their homogeneously dispersed phase by scanning electron microscopy. The elastic modulus showed an usual behavior slightly below additivity. However, the strain‐related break properties such as ductility or impact strength showed a surprising and positive, for an immiscible blend, behavior close to additivity both in as‐molded and in annealed blends. Some possibilities, such as fast cooling, the largely aromatic nature, similar solubility parameters, different dilatation or Poisson coefficients, and the inherent chemical structure of the blends are discussed as reasons for the observed behavior. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:1503–1510, 1997