Chitosan: chain rigidity and mesophase formation

✍ Scribed by Maria Terbojevich; Alessandro Cosani; Giuseppina Conio; Enrico Marsano; Estella Bianchi

• Book ID: 102995957
• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 601 KB
• Volume: 209
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(91)80161-f

✦ Synopsis

Light-scattering measurements on samples of chitosan with degrees of acetylation (d.a.) of 42 and 15% have been performed in 0.1~ acetic acid-0.2M sodium chloride. From the values of ROo, a persistence length qto of m 220 8, has been deduced, which is lower than that (_ 350A) of chitin and indicates a decrease of rigidity with decrease in d.a. The existence of a cholesteric mesophase above a critical value of [polymer] has been demonstrated.