Synthesis and Properties of Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymer

作     者：Xiaoqi Chen Jia Tian Lu Bai Haijun Zhou Mengmeng Zhou Jijun Xiao Yantao Li 

作者机构：Institute of Energy Source Hebei Academy of Sciences Shijiazhuang China School of Materials Science and Engineering Hebei University of Science and Technology Hebei Engineering Laboratory of Aviation Lightweight Composite Materials and Processing Technology Hebei Key Laboratory of Material Near-Net Forming Technology Hebei Key Laboratory of Flexible Functional Materials Shijiazhuang 050018 China 

出 版 物：《IOP Conference Series: Earth and Environmental Science》 

年 卷 期：2021年第781卷第5期

摘      要：Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymer is successfully synthesized with mPEG and DL-LA as main raw materials. FT-IR, 1H-NMR and DSC are used to study the influence of precipitant species and dosage on the properties of copolymer; and the effects of the m (mPEG)/m(LA) s ratio on the copolymer s molecular weight (Mn), glass transition temperature (Tg) and the properties of residual monomers. The results showed that the precipitant was ether, dichloromethane / ether was 1/6, m (m PEG)/m (LA) was 2/1.8, the synthesized Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymers, the residual monomer was only 0.26 and the solvent residue was only 0.04.