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Reinforced poly(ether sulfone) materials by blending with a semiaromatic liquid crystalline copolyester
Author(s) -
García M.,
Eguiazábal J. I.,
Nazábal J.
Publication year - 2003
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.13168
Subject(s) - copolyester , materials science , composite material , ultimate tensile strength , ether , thermoplastic elastomer , thermoplastic , natural rubber , compression molding , sulfone , molding (decorative) , polymer blend , miscibility , elastomer , phase (matter) , modulus , polymer , polymer chemistry , polyester , copolymer , organic chemistry , mold , chemistry
Blends based on poly(ether sulfone) (PES) and a semiaromatic liquid crystalline copolyester (R5) were obtained by injection molding across the entire composition range. The blends showed two pure amorphous phases. The fibrillar structure of the skin led to enhancements in the stiffness. The break properties, however, decreased at low LCP contents, due to the expected lack of adhesion between the phases. The increase in the modulus at increasing LCP content led to improvements in tensile strength. The notch sensitivity of PES decreased after the addition of low LCP levels, giving rise to enhancements of almost 600% in the notched impact strength. The unusually enhanced performance of the 20/80 blend, which has been seen previously in another thermoplastic/LCP blend, suggests that the dispersed PES phase in this blend may act as rubber particles do in rubber toughened thermoplastics. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 52–59, 2004