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Preparation and characterization of biodegradable chitosan and methoxy poly(ethylene glycol)‐ b ‐poly (ε‐caprolactone) blend homogeneous films
Author(s) -
Niamsa Noi,
Puntumchai Apirak,
Sutthikhum Vallaya,
Srisuwan Yaowalak,
Baimark Yodthong
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.28117
Subject(s) - materials science , ethylene glycol , polymer chemistry , chemical engineering , copolymer , chitosan , polymer blend , caprolactone , aqueous solution , fourier transform infrared spectroscopy , polymer , organic chemistry , composite material , chemistry , engineering
Blend homogeneous films of chitosan and water‐soluble methoxy poly(ethylene glycol)‐ b ‐poly(ε‐caprolactone) (MPEG‐ b ‐PCL) diblock copolymer with different blend ratios were prepared by aqueous solution blending method. The water‐soluble MPEG‐ b ‐PCL was synthesized using MPEG with molecular weight of 5000 g/mol and stannous octoate as the initiating system. The molecular weight of MPEG‐ b ‐PCL obtained from 1 H‐NMR was 5800 g/mol. FTIR spectra of the blend films showed that there were intermolecular bonds between chitosan and MPEG‐ b ‐PCL. Thermal properties of the blend films strongly depended on the blend ratios. Scanning electron micrographs indicated that the blend films were homogeneous films. However, roughness of the blend films increased whereas transparency and moisture uptake decreased upon increasing the MPEG‐ b ‐PCL blend ratios. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008