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Short Twaron aramid fiber reinforced thermoplastic polyurethane
Author(s) -
Akbarian M.,
Hassanzadeh S.,
Moghri M.
Publication year - 2008
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1225
Subject(s) - materials science , composite material , aramid , ultimate tensile strength , thermoplastic polyurethane , fiber , composite number , scanning electron microscope , rheology , dynamic mechanical analysis , modulus , thermoplastic elastomer , polyurethane , polymer , elastomer , copolymer
Mechanical, dynamic mechanical, and rheological behaviors of a short p ‐aramid fiber reinforced thermoplastic polyurethane (TPU) have been studied in the range of 0–30 wt% of fibers. The tensile strength of the composite is improved slightly at higher fiber content with a minimum at around 10 wt% of fibers. The addition of fibers markedly reduces elongation at break and entails a steady increase in the elastic modulus, but decreases the wear resistance of the matrix. Storage modulus ( E ′) is increased and the shapes of loss tangent (tan δ ) peaks point to a possible fiber–matrix interaction. Rheological studies show a power law behavior for all composites and increased viscosity with fiber loading. Study of the tensile and cryogenic fracture surfaces by scanning electron microscopy (SEM) indicates good correlation between the modes of failure and strength of the composites. The micrographs reveal good interfacial adhesion and extensive peeling and fibrillation of the fibers in the compounded and fractured composites. Theoretical models have been used to fit the experimental modulus data. Copyright © 2008 John Wiley & Sons, Ltd.