文献类型：期刊文献

英文题名：Synthesis, characterization, and crystallization behaviors of poly(D-lactic acid)-based triblock copolymer

作者：Wu, Yifan Li, Lingtong Chen, Shaopeng Qin, Jun Chen, Xiaolang Zhou, Dengfeng Wu, Hong

第一作者：Wu, Yifan

通信作者：Chen, XL[1];Chen, XL[2];Wu, H[2]

机构：[1]Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Mat Technol, Minist Educ, Chengdu 610031, Peoples R China;[2]Sichuan Univ, State Key Lab Polymer Mat Engn, Polymer Res Inst, Chengdu 610065, Peoples R China;[3]Guizhou Univ, Key Lab Karst Environm & Geohazard, Minist Land & Resources, Guiyang 550025, Peoples R China;[4]Guizhou Inst Technol, Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Peoples R China

第一机构：Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Mat Technol, Minist Educ, Chengdu 610031, Peoples R China

通信机构：corresponding author), Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Mat Technol, Minist Educ, Chengdu 610031, Peoples R China;corresponding author), Sichuan Univ, State Key Lab Polymer Mat Engn, Polymer Res Inst, Chengdu 610065, Peoples R China.

年份：2020

卷号：10

期号：1

外文期刊名：SCIENTIFIC REPORTS

收录：;Scopus(收录号：2-s2.0-85080114801);WOS:【SCI-EXPANDED(收录号:WOS:000563070100008)】；

基金：The authors gratefully acknowledge the research funding provided by International Science and Technology Cooperation Project of Sichuan (2019YFH0047), Opening Project of State Key Laboratory of Polymer Materials Engineering (Sichuan University) (2017-4-02), National Natural Science Foundation of China (51763002), International Science and Technology Cooperation Project of Chengdu (2017-GH02-00051-HZ), and Guizhou Provincial Higher Education Engineering Research Center [Qian Jiao He KY (2017)021]. The authors also acknowledge the financial support.

语种：英文

摘要：Poly(D-lactic acid) (PDLA) with different polyethylene glycol (PEG) segment synthesized PDLAPEG-PDLA triblock copolymer through the ring-opening reaction of D-LA and PEG will be used as a toughening modifier. The microstructure, crystal structures and crystallization behaviors of this triblock copolymer were investigated by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The triblock copolymer is synthesized from the appearance of CH2 stretching vibration peak at 2910 cm(-1) and C-O stretching vibration peak at 1200 cm(-1) from PEG in FTIR spectra. Moreover, the chemical shift that is about 3.6 ppm in H-1 NMR and 68.8ppm in C-13 NMR proves this matter. The results of XRD and DSC reveal that PDLA and PEG are crystallized separately, and are not fully compatible, and microphase separation has occurred in this triblock copolymer. PEG can induce the triblock copolymer to accelerate the rate of crystallization, allowing it to crystallize more completely in the same amount of time. When the molecular weight of PEG is 6000 or the ratio of D-LA/PEG is 1/1, the crystallizability of PDLA-PEG-PDLA triblock copolymer is the best.