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Synthesis and properties of biodegradable chitin‐ graft ‐poly( L ‐lactide) copolymers
Author(s) -
Kim Ji Young,
Ha Chang Sik,
Jo Nam Ju
Publication year - 2002
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1000
Subject(s) - copolymer , polymer chemistry , chitin , fourier transform infrared spectroscopy , materials science , polymerization , lithium chloride , lactide , monomer , differential scanning calorimetry , polymer , biodegradable polymer , magic angle spinning , chemical engineering , nuclear magnetic resonance spectroscopy , chemistry , organic chemistry , chitosan , composite material , physics , engineering , metallurgy , thermodynamics
In this study, novel biodegradable polymers were synthesized by ring opening polymerization (ROP) of L ‐lactide on chitin in an N,N ‐dimethyl acetamide (DMAc)/lithium chloride (LiCl) solvent system, and chitin was used as macroinitiator to afford new materials. Lithium chloride (LiCl) was used as catalyst. The synthesized copolymers [chitin‐ graft ‐poly( L ‐lactide) (PLLA)] were characterized by Fourier transform infrared (FTIR) spectroscopy to confirm the newly formed ester bond. From the FTIR spectra, the peak intensity of ester bond in the chitin‐ graft ‐PLLA copolymers increased in comparison to that of L ‐lactide monomer. Therefore, it was confirmed that PLLA was successfully grafted on to chitin. Also, cross polarization–magic angle spinning (CP‐MAS), 13 C solid state NMR spectroscopy and differential scanning calorimetry were used to characterize novel chitin‐ graft ‐PLLA copolymers. © 2002 Society of Chemical Industry