Synthesis and Properties Investigation of Thiophene-aromatic Polyesters: Potential Alternatives for the 2,5-Furandicarboxylic Acid-based Ones  

作　　者：Jing Gang Wang Xiao-Qin Zhang Ang Shen Jin Zhu Ping An Song Hao Wang Xiao Qing Liu 

机构地区：[1]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]Universty of Chinese Academy ofSciences,Bejing 100049,China [3]University of Southern Queensland,Springfield,QLD 4300,Australia

出　　处：《Chinese Journal of Polymer Science》2020年第10期1082-1091,I0005,共11页高分子科学（英文版）

基　　金：This work was finanially supported by the National Natural Science Foundation of China(No.21975270);Zhejiang Provincial Natural Science Foundation of China(No.LR20E030001);Ningbo 2025 Key Scientific Research Programs(No.2018810015);National Key Research and Development Program of China(No.2018YFD0400700);Research Project of Ningbo Natural Science Foundation(No.2019A610141).

摘　　要：In order to explore new substitutes for 2,5 furandicarboxylic acid(FDCA)or poly(ethylene 2,5 furandicarboxylate)(PEF)and try to develop more ideal bio based polyesters,several thiophene aromatic polyesters(PETH,PPTH,PBTH,and PHTH)were synthesized from dimethyl thiophene 2,5-dicarboxylate(DMTD)and different diols,including ethylene glycol,1,3-propanediol,1,4-butanediol,and 1,6-hexanediol.The chemical structures of obtained polyesters were confirmed by nuclear magnetic resonance spectroscopy(H-NMR and 1'C-NMR).Determined by GPC measurement,their average molecular weight(M.)varied from 5.22 x 10*g/mol to 7.94 x 10*g/mol with the molar-mass dispersity of 1.50-2.00.Based on the DSC and TGA results,the synthesized polyesters PETH,PPTH,and PBTH displayed comparable or even better thermal properties when compared with their FDCA-based analogues.From PETH to PHTH,their Tg varied from 64.6°Cto-1°C while Tsm ranged from 409 C to 380°C in nitrogen atmosphere,PETH showed elongation at break as high as 378%,tensile strength of 67 MPa,and tensile modulus of 1800 MPa.Meanwhile,the CO2 and O2 barrier of PETH was 12.0 and 6.6 folds higher than those of PET,respectively,and similar to those of PEF.Considering the overall properties,the synthesized thiophene aromatic polyesters,especially PETH,showed great potential to be used as an excellent bio based packaging material in the future.

关 键 词：2 5-Thiophenedicarboxlic acid(TDCA) 2 5 Furandicarborxylic acid(FDCA) Bio based polyesters Brrier properties 

分 类 号：TQ326.6[化学工程—合成树脂塑料工业]