Graft polymerization of acrylamide on chitosan: Copolymer structure and properties

Autor:	A. A. Knyazev, A. E. Mochalova, Yu. D. Semchikov, N. V. Zaborshchikova, L. A. Smirnova, V. V. Medvedeva, V. A. Izvozchikova
Rok vydání:	2006
Předmět:	Materials science Polymers and Plastics Radical polymerization technology industry and agriculture macromolecular substances Chitosan chemistry.chemical_compound Monomer chemistry Polymerization Acrylamide Self-healing hydrogels Polymer chemistry Materials Chemistry Copolymer Ammonium persulfate
Zdroj:	Polymer Science Series A. 48:918-923
ISSN:	1555-6107 0965-545X
DOI:	10.1134/s0965545x06090069
Popis:	Graft copolymers have been prepared through the free-radical polymerization of acrylamide in water-acetic acid solutions of chitosan in the presence of ammonium persulfate as an initiator. The effect of temperature, pH of a medium, and concentrations of initiator, chitosan, and acrylamide on the grafting kinetics and efficiency has been established. The local concentration of acrylamide in the reaction zone increases due to intermolecular hydrogen bonding between polysaccharide and monomer molecules. Copolymer films are characterized by better mechanical properties compared to those of polysaccharide. Hydrogels with good viscoelastic properties have been obtained when grafting was performed in the presence of N,N-methylenebisacrylamide as a crosslinking agent.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c65c393b23897647c0b15abbb161904a https://doi.org/10.1134/s0965545x06090069 Zobrazit plný text záznamu Full text from SpringerLink