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Polyester–polycarbonate blends. II. Poly(ethylene terephthalate)
Author(s) -
Nassar T. R.,
Paul D. R.,
Barlow J. W.
Publication year - 1979
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.1979.070230108
Subject(s) - polycarbonate , polyester , materials science , crystallization , amorphous solid , poly ethylene , ethylene , glass transition , melting point depression , melting point , polymer chemistry , mixing (physics) , phase (matter) , chemical engineering , composite material , polymer , organic chemistry , chemistry , physics , quantum mechanics , engineering , catalysis
Melt blends of polycarbonate and poly(ethylene terephthalate) were prepared and examined for their transitional behavior by thermal analysis and dynamic mechanical testing. A single T g was observed for compositions containing more than 60%–70% PET by weight while compositions below this range showed two glass transitions. From this it is concluded that PC and PET are completely miscible in the amorphous phase for PET‐rich compositions, whereas PC‐rich blends separate into two amorphous phases which apparently contain both components. Melting point and crystallization behavior are conssistent with these conclusions and suggest that very little if any interchange reactions occur between the ester and carbonate groups during melt mixing.