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Chemistry of the ternary blends of poly(ethylene terephthalate), bisphenol‐a‐polycarbonate, and polypropylene
Author(s) -
Halder R. S.,
Misra A.,
Deopura B. L.
Publication year - 1989
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.760290603
Subject(s) - polycarbonate , exothermic reaction , polypropylene , materials science , ternary operation , thermogravimetric analysis , ethylene , bisphenol a , chemical engineering , ternary numeral system , differential scanning calorimetry , polymer chemistry , diphenyl carbonate , ethylene carbonate , polymer blend , mixing (physics) , composite material , polymer , organic chemistry , transesterification , chemistry , thermodynamics , methanol , catalysis , copolymer , electrolyte , computer science , engineering , programming language , physics , electrode , epoxy , quantum mechanics
Poly(ethylene terephthalate) (PET) and bisphenol‐a‐polycarbonate (PC) are known to form a miscible blend whereas ternary blends of PET, PC, and polypropylene (PP) form two phases. This is based on the considerations of various chemical events which may occur in these systems. The role of ester‐carbonate interchange reactions during melt mixing and fabricating is found to be unimportant. Differential scanning calorimetric analysis of the ternary blends shows that there appears to occur an exothermic transition in the heating mode of the instrument. This exothermic event was found to be suppressed considerably by incorporating suitable additives into the system. Degradation reactions studied by thermogravimetric analysis and a dilute solution viscometric technique reveal that there exists some kind of interaction among the components even with the immiscible PP component.