Premium
Compatibilization and property characterization of polycarbonate/polyurethane polymeric alloys
Author(s) -
Archondouli P. S.,
Kallitsis J. K.,
Kalfoglou N. K.
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.11503
Subject(s) - materials science , polycarbonate , compatibilization , miscibility , thermogravimetric analysis , polyurethane , dynamic mechanical analysis , differential scanning calorimetry , composite material , thermal stability , fourier transform infrared spectroscopy , isocyanate , polymer blend , polyester , ultimate tensile strength , polymer chemistry , polymer , copolymer , chemical engineering , physics , engineering , thermodynamics
Polymeric alloys of bisphenol A polycarbonate and a polyester‐type polyurethane were prepared over a complete composition range through melt mixing. The blends were characterized with optical and scanning electron microscopy, tensile testing, dynamic mechanical analysis, thermal analysis (differential scanning calorimetry and thermogravimetric analysis), and spectroscopic techniques (Fourier transform infrared and 1 H‐NMR). A morphology examination revealed good component dispersion with 30 wt % polyurethane or less and strong interface adhesion. Dynamic mechanical analysis indicated partial component miscibility and tensile testing mechanical behavior typical of a polymeric alloy. Overall, the degree of compatibilization obtained with polycarbonate was lower than that observed previously with poly(ethylene terephthalate) or poly(butylene terephthalate). This was attributed to the lower reactivity of the aromatic OH of polycarbonate toward the isocyanate groups of polyurethane and the thermal instability of the copolymer–compatibilizer formed. Experimental evidence for the formation of the latter was provided by 1 H‐NMR and dynamic mechanical analysis of selectively leached blends and by quantitative analysis results for the extraction experiments. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 612–626, 2003