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The Study of Miscibility and Hydrogen Bonding in Blends of Phenolics with Poly(ε‐caprolactone)
Author(s) -
Wei Kuo Shiao,
Chih Chang Feng
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20011101)202:16<3112::aid-macp3112>3.0.co;2-x
Subject(s) - miscibility , differential scanning calorimetry , hydrogen bond , fourier transform infrared spectroscopy , caprolactone , polymer chemistry , glass transition , tetrahydrofuran , materials science , polymer , chemical engineering , melting point depression , enthalpy , chemistry , molecule , organic chemistry , polymerization , composite material , thermodynamics , melting point , physics , solvent , engineering
Blends of phenolics with poly( ε ‐caprolactone) (PCL) were prepared by solution casting from the tetrahydrofuran (THF) solution. Differential scanning calorimetry (DSC) and Fourier‐Transform infrared spectroscopy (FTIR) were used to examine the miscibility behavior and hydrogen bonding of the blend. This phenolics/PCL blend system is fully miscible based on single glass transition temperature due to the formation of inter hydrogen bonding between hydroxyl of phenolic and carbonyl of PCL. In addition, a negative polymer‐polymer interaction energy density “ B ” was obtained based on the melting depression of PCL using the Nishi‐Wang equation. Furthermore, FTIR was used to study the hydrogen‐bonding interaction between the phenolic hydroxyl group and the PCL carbonyl group at various temperatures and compositions. Moreover, the inter‐association equilibrium constant and its related enthalpy of phenolic/PCL blends were determined and used to predict the miscibility window, free energy and fraction of the hydrogen bonding according to the Painter‐Coleman association model (PCAM).