Synthesis and Properties of Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymer. Issue 5 (May 2021)

• Record Type: Journal Article
• Authors: Chen, Xiaoqi; Tian, Jia; Bai, Lu; Zhou, Haijun; Zhou, Mengmeng; Xiao, Jijun; Li, Yantao
• Is Part Of: IOP conference series. Volume 781:Issue 5(2021)
• Publication Date: 2021-05
• Subjects: Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymer -- DL-LA -- mPEG; Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/781/5/052015
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: 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.