title: Synthesis and characterization of tannin grafted polycaprolactone.
abstract: Tannin and biodegradable polyester have attracted increasing interest for biomedical applications. To improve their compatibility, a novel tannin grafted polycaprolactone (TA-g-PCL) has been synthesized via ring-opening polymerization reaction. The structure of the product is characterized with FTIR, (1)H NMR and GPC. GPC results show that the experimental molecular weight is far less than the theoretical due to complicated stereo structure and large steric hindrance of tannic molecule, but the polydispersity of the product is narrow. At 115.76:1 of molar ratio of CL to tannin, molecular weight of the product reaches the maximum. Thermodynamics properties and dissolubility of TA-g-PCL are closely related to its molecular weight. With PCL molecular chain grows, TA-g-PCL changes from amorphous form to crystalline structure, and its dissolubility in chloroform is also enhanced significantly.
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Song
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China.
authors.forename: Suchen
authors.initials: S
authors.lastname: Jiang
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China.
authors.forename: Yajun
authors.initials: Y
authors.lastname: Ren
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China.
authors.forename: Xue
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China.
authors.forename: Tiankui
authors.initials: T
authors.lastname: Qiao
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China. Electronic address: jlsongx@163.com.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Song
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China.
authors.forename: Qimin
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
authors.forename: Xuesi
authors.initials: X
authors.lastname: Chen
mesh_terms: D015394:Molecular Structure; D011091:Polyesters / Q000138:chemical synthesis* / Q000737:chemistry*; D013634:Tannins / Q000737:chemistry*
chemical_list: D011091:Polyesters; D013634:Tannins; C016240:polycaprolactone
keywords: Dissolubility; Graft; Polycaprolactone; Tannin; Thermodynamics