A novel and simple procedure to synthesize chitosan-graft-polycaprolactone in an ionic liquid

作者：Wang Zhaodong; Zheng Liuchun^*; Li Chuncheng; Zhang Dong; Xiao Yaonan; Guan Guohu; Zhu Wenxiang

来源：Carbohydrate Polymers, 2013, 94(1): 505-510.

DOI：10.1016/j.carbpol.2013.01.090

• Ionic liquid
• Homogeneous reaction
• Chitosan
• Graft
• Polycaprolactone

An ionic liquid, 1-ethyl-3-methylimidazolium acetate (EMIMAc), was synthesized and employed as a homogeneous and green reaction media to prepare chitosan-graft-polycaprolactone (CS-g-PCL) via ring-opening polymerization, using stannous octoate (Sn(Oct)(2)) as a catalyst. The structures and compositions of copolymers could be facilely controlled by the reaction conditions and feed ratios. The grafting content of polycaprolactone (PCL) could reach as high as 630%. The chemical structures of the copolymers were systematically characterized by H-1 NMR, Fourier transform infrared spectroscopy (FTIR) and wide-angle X-ray diffraction (WAXD), while thermal properties were studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The thermal stability and glass transition temperature (T-g) of the graft copolymers vary regularly with the change of PCL grafting content.

• 出版日期2013-4-15
• 单位中国科学院; 中国科学院化学研究所