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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 183-185Syntheses and Characterization of Chitosan...

Syntheses and Characterization of Chitosan Oligosaccharide-Graft-Polycaprolactone Copolymer I Thermal and Spherulite Morphology Studies

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Abstract:

The thermoplastic graft copolymers of chitosan oligosaccharide (PHCSO-g-PCL) were successfully synthesized via ring-opening polymerization (ROP) of ε-caprolactone (CL) through an amino group protection route using phthaloyl chitosan oligosaccharide (PHCSO) as intermediate. The graft reaction was carried out in Pyridine at 120 °C with a chitosan oligosaccharide (CSO) initiator and a tin 2-ethylhexanoate (Sn (Oct)₂) catalyst. The prepared copolymer was characterized by FTIR, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), wide-angle X-ray diffraction (WAXD). DSC analysis of PHCSO-g-PCL showed higher melting point at 54.8 °C than linear PCL. The TGA analysis showed that PHCSO-g-PCL was more thermal stable than original CSO. The banded spherulite structure of PHCSO-g-PCL and the growth of spherulite were observed by polarized optical microscope (POM); this was further proven by WAXD results.

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Periodical:

Advanced Materials Research (Volumes 183-185)

Pages:

155-160

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.183-185.155

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Online since:

January 2011

Authors:

Feng Hong Li, San Xi Li, Tao Jiang, Yong Sun

Keywords:

Chitosan Oligosaccharide, Graft Copolymer, Polycaprolactone, Spherulite, Thermal Property

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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