Synthesis of cyanoethyl chitosan derivatives

Autor:	V. F. Ur’yash, K. V. Kir'yanov, N. V. Vostokov, L. A. Smirnova, Yu. D. Semchikov, N. A. Andriyanova, N. V. Zaborshchikova
Rok vydání:	2006
Předmět:	Chitosan chemistry.chemical_compound Nucleophilic addition Polymers and Plastics chemistry Absorption band Reagent Polymer chemistry Materials Chemistry Infrared spectroscopy Atmospheric temperature range Acrylonitrile Catalysis
Zdroj:	Polymer Science Series A. 48:483-488
ISSN:	1555-6107 0965-545X
DOI:	10.1134/s0965545x06050051
Popis:	Cyanoethyl chitosan derivatives with various substitution degrees have been synthesized by the nucleophilic addition of acrylonitrile to the functional groups of chitosan. The process proceeds under homogeneous conditions without any catalyst at various pH values and reagent concentrations in the temperature range of 273–333 K. The formation of cyanoethyl chitosans is established by a gain in the weight of chitosan, a change in its content of nitrogen, and the appearance of an absorption band at 2250 cm−1 in the IR spectrum which corresponds to the stretching vibrations of a-C≡N group. It has been shown that the most efficient addition of acrylonitrile occurs at 273 K and pH 5.5. Cyanoethyl chitosan samples show better mechanical parameters and are characterized by a lower ordering than the parent chitosan.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0fa99c7eedfa0e499234fe56d14ab87a https://doi.org/10.1134/s0965545x06050051 Zobrazit plný text záznamu Full text from SpringerLink