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Melting and crystallization behavior of miscible copolyester–polycarbonate blends
Author(s) -
Barnum R. S.,
Barlow J. W.,
Paul D. R.
Publication year - 1982
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.1982.070271035
Subject(s) - copolyester , crystallization , polycarbonate , materials science , melting point depression , melting point , miscibility , thermodynamics , polymer chemistry , composite material , polymer , polyester , physics
The melting and crystallization behavior of Kodar, a copolyester formed from 1,4‐cyclohexanedimethanol and a mixture of terephthalic and isophthalic acids, and its miscible blends with polycarbonate was examined. The results of the melting behavior are discussed in terms of crystallization‐induced chemical rearrangements and the copolymeric character of Kodar and interchange reactions between components when polycarbonate is present in the blend. For various reasons, the melting behavior cannot be extrapolated to infinite crystal size using the Hoffman–Weeks approach. Crystallization kinetics follows the Avrami equation, with rates being higher when the crystallization temperatuare is approached from the glass rather than from the melt. The kinetic data are discussed in terms of modern theories. An approximate melting point depression analysis is used to estimate the interaction parameter for the blend, and the result obtained is compared to a value from another technique.