Premium
Thermal behavior, morphology, and some melt properties of blends of polycarbonate with poly(styrene‐co‐acrylonitrile) and poly(acrylonitrile‐butadiene‐styrene)
Author(s) -
Kim W. N.,
Burn C. M.
Publication year - 1988
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760281706
Subject(s) - materials science , polycarbonate , differential scanning calorimetry , acrylonitrile , die swell , polymer blend , acrylonitrile butadiene styrene , polymer chemistry , miscibility , glass transition , scanning electron microscope , extrusion , styrene , composite material , polymer , copolymer , physics , thermodynamics
Blends of bisphenol‐ A polycarbonate (PC) with poly‐ (styrene‐co‐acrylonitrile) (SAN) and poly (acrylonitrile‐butadiene‐styrene) (ABS) prepared by screw extrusion and solution‐casting were investigated by differential scanning calorimetry and scanning electron microscopy. From the measured glass‐transition temperatures ( T g ) and specific heat increments (ΔC p ) at the T g , SAN appears to dissolve more in the PC‐rich phase than does PC in the SAN‐rich phase. Also, the decrease of T g (PC) in PC/ABS blends is larger than in the PC/SAN blends. From the T g behavior and the electron microscopy study, it is suggested that the compatibility increases more in the SAN‐rich compositions than in the PC‐rich compositions of the blends. In the study of extrudate swell of the PC/SAN blends and the PC/ABS blends, the maximum level of extrudate swell is reached at 0.5 weight fraction of PC for both blend systems. The Flory‐Huggins polymer‐polymer interaction parameter (χ12) between PC and SAN was calculated and found to be 0.034 ± 0.004. A similar value of χ for PC and SAN was found with the PC/ABS blends.