Intrinsic viscosity-molecular weight relationship for chitosan

Journal of Polymer Science Part B: Polymer PhysicsVolume 38, Issue 19 p. 2591-2598 Article Intrinsic viscosity–molecular weight relationship for chitosan Mohammad R. Kasaai, Mohammad R. Kasaai Department of Food Science and Nutrition, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Search for more papers by this authorJoseph Arul, Joseph Arul Department of Food Science and Nutrition, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Search for more papers by this authorGérard Charlet, Corresponding Author Gérard Charlet [email protected] Department of Chemistry and CERSIM, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Department of Chemistry and CERSIM, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Search for more papers by this author Mohammad R. Kasaai, Mohammad R. Kasaai Department of Food Science and Nutrition, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Search for more papers by this authorJoseph Arul, Joseph Arul Department of Food Science and Nutrition, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Search for more papers by this authorGérard Charlet, Corresponding Author Gérard Charlet [email protected] Department of Chemistry and CERSIM, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Department of Chemistry and CERSIM, Université Laval, Sainte-Foy, Quebec, Canada, G1K 7P4Search for more papers by this author First published: 17 August 2000 https://doi.org/10.1002/1099-0488(20001001)38:19<2591::AID-POLB110>3.0.CO;2-6Citations: 225Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract The intrinsic viscosity–molecular weight relationship for chitosan was determined in 0.25 M acetic acid/0.25M sodium acetate. Chitosan samples with a degree of acetylation (DA) between 20 and 26% were prepared from shrimp-shell chitosan by acid hydrolysis (HCl) and oxidative fragmentation (NaNO2). Absolute molecular weights were measured by light scattering and membrane osmometry. Size exclusion chromatography (SEC) was used to determine average molecular weights (Mn, Mv, and Mw) and polydispersity. The following Mark–Houwink–Sakurada equation (MHS) is proposed for chitosan of Mw in the range of 35–2220 kDa: The value of the MHS exponent a suggests that chitosan behaves as a flexible chain in this solvent. 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