A novel approach to 1, 2, 3-triazole grafted chitosans via modified Wolff's cyclocondensation. (January 2018)

• Record Type: Journal Article
• Authors: Zhang, Zixu; Wang, Zikun; Mu, Hongliang; Wang, Xin; Li, Yunhui; Yan, Jingling; Wang, Zhen
• Is Part Of: European polymer journal. Volume 98(2018)
• Page Start: 492
• Page End: 498
• Publication Date: 2018-01
• Subjects: 1, 2, 3-Triazole -- Chitosan -- Wolff's cyclocondensation -- α-Diazo-β-oxoamides -- Degree of conversion; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2017.11.047
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: 1, 2, 3-Triazole grafted chitosans were synthesized by Wolff's cyclocondensation. The reaction is regioselectivity and the products possess polyfunctional groups. The 1, 2, 3-triazole grafted chitosans possess considerable grafting ratio. Abstract: A novel synthetic strategy to afford 1, 2, 3-triazole grafted chitosans via modified Wolff's cyclocondensation was established. Subsequently, several multi-substituted 1, 2, 3-triazole grafted chitosans with a degree of conversion (DC) varying from 42.1% to 53.9% were synthesized and characterized. The chemical structures of the modified chitosans were confirmed by Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance spectroscopy ( 1 H NMR), and the DC of chitosan derivatives were determined by amino titration. Meanwhile, the impact of 1, 2, 3-triazole moieties in the chitosan on their thermal properties were characterized by thermogravimetic analysis (TGA) and differential calorimetry scanner (DSC) respectively.