Syntheses and Characterization of Chitosan oligosaccharide-graft-polycaprolactone Copolymer I Thermal and Spherulite Morphology Studies
The thermoplastic graft copolymers of chitosan oligosaccharide (PHCSO-g-PCL) were successfully synthesized via ring-opening polymerization (ROP) of e-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 ℃ 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 ℃ 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.
Fenghong Li Sanxi Li Tao Jiang Yong Sun
School of Petrochemical Engineering,Shenyang University of Technology, Liaoyang 111003,China School of Science, Shenyang University of Technology, Shenyang 110178, China School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang 111003,China School of Material Science and Engineering,Shenyang University of Technology, Shenyang 110178,China
国际会议
哈尔滨
英文
155-160
2011-03-26（万方平台首次上网日期，不代表论文的发表时间）