Activation energy of copper-induced thermal degradation of chitosan acetate functional groups
-
Maria Mucha
and
Halina Kaczmarek
Abstract
Thin films of chitosan acetate (CSA)-copper (II) [Cu (II)] complex were prepared by mixing Cu (II) oxide (CuO) nanoparticles in acetic acid solution of chitosan and the casting method. The changes in chemical structure of modified chitosan were confirmed by UV-Vis spectroscopy. Fourier transform infrared (FTIR) spectroscopy was applied to monitor thermal degradation processes occurring in chitosan and its composites with Cu. The changes in concentration of chitosan functional groups were observed. On a base of the kinetic constants of group thermal degradation at various temperatures, the activation energies for various groups were calculated. It was found that the presence of Cu (II) ions accelerates the thermal degradation of chitosan acetate. The higher the Cu (II) content was in the CSA matrix, the lower was the activation energy.
Acknowledgments
The presented research was financially supported by the Polish National Science Centre under Grant No. UMO-2011/01/B/ST8/06679.
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Articles in the same Issue
- Frontmatter
- Original articles
- The synthesis of styrene acrylate emulsion and its application in xerographic paper
- Effect of different photoinitiators on the properties of UV-cured electromagnetic shielding composites
- Cationic vinyl monomer-grafted polypropylene preparation and its use as a compatibilizer for polypropylene/poly(vinyl chloride) blends
- Activation energy of copper-induced thermal degradation of chitosan acetate functional groups
- The soluble copolymers of polyalkylthiophenes with different molar ratios of co-mers
- Influence of methyl methacrylate-co-glycidyl methacrylate copolymers on the compatibility, morphology and mechanical properties of poly(butylene terephthalate) and polycarbonate blends
- Mechanical properties and toughening mechanisms of epoxy/graphene nanocomposites
- A process analysis for microchannel deformation and bonding strength by in-mold bonding of microfluidic chips
- Structure and properties of low-isotacticity polypropylene elastomeric fibers prepared by sheath-core bicomponent spinning: effect of localization of high-isotacticity component near the fiber surface
- Spectroscopic characterization and microbial degradation of engineered bio-elastomers from linseed oil
