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Phase behavior of poly(ε‐caprolactone)/ poly (vinylidene fluoride) blends
Author(s) -
Jo Won Ho,
Park Soon Jong,
Kwon Ick Hwan
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990290304
Subject(s) - miscibility , lower critical solution temperature , materials science , melting point depression , spinodal , cloud point , crystallization , melting point , spinodal decomposition , caprolactone , polymer blend , fluoride , polymer chemistry , phase (matter) , polymer , chemical engineering , thermodynamics , composite material , copolymer , pulmonary surfactant , chemistry , organic chemistry , physics , inorganic chemistry , engineering
Abstract The miscibility of blends of poly (ε‐caprolactone) (PCL)/poly(vinylidene fluoride) (PVDF) was studied by measuring the cloud point, melting point depression and crystallization kinetics. Lower critical solution temperature (LCST) behavior was observed at PCL‐rich compositions, whilst it was not observed at high compositions of PVDF. However it is possible that an LCST could exist below the melting point of PVDF. From analysis of the melting point depression, the Flory interaction parameter x 12 , was calculated from the Nishi‐Wang equation and the value was found to be‐1.5. The crystallization rate of PCL increased with increasing amount of PVDF in the blend. The spinodal curve for PCL/PVDF blends was simulated by using the lattice‐fluid theory.