Studies on graft copolymerization of 2-hydroxyethyl acrylate onto chitosan

• Published in: Reactive & functional polymers Vol. 68; no. 1; pp. 389 - 395
• Main Authors: Mun, Grigoriy A., Nurkeeva, Zauresh S., Dergunov, Sergey A., Nam, Irina K., Maimakov, Tauzhan P., Shaikhutdinov, Erengaip M., Lee, Sang Cheon, Park, Kinam
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 2008; Elsevier Science
• Subjects: 2-Hydroxyethyl acrylate; Acrylates; Applied sciences; Chitosan; Copolymers; Dynamic viscosity; Exact sciences and technology; FT-IR; Graft-polymerization; Grafting; Natural polymers; NMR; Physicochemistry of polymers; Solubility; Spectra; Starch and polysaccharides; FT-IR; NMR; Dynamic viscosity; Chitosan; 2-Hydroxyethyl acrylate; Graft-polymerization; Graft copolymer; Experimental study; Grafting; Optimization; Operating conditions; Homogeneous reaction; Chitosan derivatives; Reaction mechanism; Oside polymer; Aqueous solution; Chitosan graft copolymer; Hydroxyethyl acrylate copolymer; Growth from solution
• ISSN: 1381-5148
• DOI: 10.1016/j.reactfunctpolym.2007.07.012

Graft-polymerization of 2-hydroxyethyl acrylate (HEA) onto chitosan (CS) using ammonium persulfate (APS) as an initiator was carried out in an aqueous solution. Evidence of grafting was obtained by comparing
1H NMR and FT-IR spectra and scanning electron microscopy images of chitosan and the grafted copolymer as well as solubility characteristics of the products. The effects of APS, HEA concentration, reaction temperature and duration of graft-polymerization were studied by determining the grafting parameters, such as grafting percentage and grafting efficiency. The HEA-grafted chitosan product is soluble in a wide pH range, while the original unmodified chitosan is water-soluble only in a narrow pH range. A mechanism for the free-radical grafting was proposed.