title: Preparation and properties of thermoplastic poly(caprolactone) composites containing high amount of esterified starch without plasticizer.
abstract: Based on stearyl chloride and native starch, esterified starch were prepared and the chemical structure was characterized by (1)H NMR and FTIR. It was found that stearyl chloride was an efficient agent to fabricate esterified starch with high degree of substitution (DS). During the melt blending of esterified starch (80 wt%) and poly(caprolactone) (PCL, 20 wt%), it was shown the torque of PCL/esterified starch was much lower than that of PCL/native starch without any plasticizer, and further decreased with increasing DS. Compared with PCL/native starch, the tensile properties of PCL/esterified starch composites were significantly enhanced. The tensile strength and elongation at break were increased from 2.7 MPa to 56% for PCL/native starch composites to 9.1 MPa and 626% for PCL/esterified starch ones with DS of 1.50, respectively. SEM observation revealed the esterified starch particles in matrix became smaller and more uniform. In addition, the water resistance and hydrophobic character of PCL/esterified starch composites were improved. PCL composites containing 80 wt% esterified starch with favorable mechanical properties would have great potential applications in broad areas.
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Sun
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
authors.forename: Qiongen
authors.initials: Q
authors.lastname: Hu
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Qian
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Li
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
authors.forename: Piming
authors.initials: P
authors.lastname: Ma
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.
authors.forename: Dongjian
authors.initials: D
authors.lastname: Shi
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China. Electronic address: wfdong@jiangnan.edu.cn.
authors.forename: Weifu
authors.initials: W
authors.lastname: Dong
authors.affiliation: The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China. Electronic address: mq-chen@jiangnan.edu.cn.
authors.forename: Mingqing
authors.initials: M
authors.lastname: Chen
mesh_terms: D004951:Esterification; D009682:Magnetic Resonance Spectroscopy; D010968:Plasticizers; D010969:Plastics / Q000737:chemistry*; D011091:Polyesters / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D010968:Plasticizers; D010969:Plastics; D011091:Polyesters; C016240:polycaprolactone; D013213:Starch
keywords: Degrees of substitution; Esterified starch; Poly(caprolactone); Stearyl chloride