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Miscibility, thermal, and mechanical studies of hydroxypropyl methylcellulose/pullulan blends
Author(s) -
Prasad P.,
Guru G. S.,
Shivakumar H. R.,
Rai K. Sheshappa
Publication year - 2008
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.28575
Subject(s) - pullulan , miscibility , materials science , thermogravimetric analysis , fourier transform infrared spectroscopy , differential scanning calorimetry , polymer blend , polymer chemistry , chemical engineering , composite material , chemistry , organic chemistry , polymer , thermodynamics , copolymer , polysaccharide , physics , engineering
Miscibility of blends of hydroxypropyl methylcellulose (HPMC) and Pullulan in common solvent water were studied by viscometry, ultrasonic, density, and refractometric methods at 30 and 40°C. Further the blend films of HPMC and Pullulan were prepared by solution casting method and characterized by Fourier transform IR spectroscopy (FTIR), scanning electron microscopy, tensile measurements, thermogravimetric, and differential scanning calorimetric (DSC) methods. Using the viscosity data, interaction parameters were computed and it suggests that the blend is miscible when the HPMC content is more than 50% in the blend. The change in temperature had no significant effect on the miscibility of HPMC/Pullulan blends. The semimiscibility is confirmed by ultrasonic velocity, density, and refractometric methods. The specific intermolecular interactions of hydrogen bonding type of the blends were investigated by DSC and FTIR. The miscible compositions of HPMC/Pullulan blend showed improved thermal and mechanical properties. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008