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Tailoring Molecular Weight of Bioderived Polycarbonates via Bifunctional Ionic Liquids Catalysts under Metal-Free Conditions
Ma, Congkai1,2,3; Xu, Fei1; Cheng, Weiguo1; Tan, Xin1,3; Su, Qian1,3; Zhang, Suojiang1,3
2018-02-01
发表期刊ACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN2168-0485
卷号6期号:2页码:2684-2693
摘要Synthesis of bioderived high-molecular-weight polycarbonates over metal-free catalysts is of great importance but also challenging. In this work, a series of 1-butyl-3-methylimidazolium (Bmim) ionic liquids (ILs) were prepared as catalysts for a melt polycondensation reaction of isosorbide and diphenyl carbonate. By modifying the structures of ILs' anions, the number-average molecular weight (M-n) of poly(isosorbide carbonate) (PIC) was effectively tailored. In the presence of a trace amount (0.05 mol % based on isosorbide) of bifunctional [Bmim][CH3CHOHCOO], the synthesized PIC possessed high M-n of 61,700 g/mol and a glass transition temperature of 174 degrees C, both the highest so far to the best of our knowledge. Besides, it was found that the anions with stronger electronegativity and hydrogen bond formation ability were more efficient for the formation of PIC with higher M-n. To modify the flexibility of PIC, poly(aliphatic diol-co-isosorbide carbonate)s with M-n ranging from 34,000 to 75,700 g/mol were also formulated by incorporating with various aliphatic diols. Additionally, based on the experimental results and nuclear magnetic resonance spectroscopy, a possible mechanism of cooperative nucleophilic-electrophilic activation through hydrogen bond formation and electrostatic interactions by the ILs catalyst was proposed.
关键词Bioderived Polycarbonate Bifunctional Ionic Liquids Catalysis Hydrogen Bond
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1021/acssuschemeng.7b04284
收录类别SCI
语种英语
关键词[WOS]ALIPHATIC POLYCARBONATES ; MELT POLYCONDENSATION ; DIMETHYL CARBONATE ; CYCLIC CARBONATES ; ETHYLENE-GLYCOL ; ISOSORBIDE ; TRANSESTERIFICATION ; POLYMERIZATION ; POLYESTERS ; SOLVENTS
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Engineering
WOS类目Chemistry, Multidisciplinary ; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY ; Engineering, Chemical
项目资助者National Natural Science Foundation of China(21676274 ; National Key R&D Program of China(2016YFB0600903) ; 21506226)
WOS记录号WOS:000424728300126
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24020
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Inst Proc Engn,Key Lab Green Proc & Engn, 1 North Second St, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sino Danish Coll, 380 Huaibeizhuang, Beijing 101408, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem & Chem Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China
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GB/T 7714
Ma, Congkai,Xu, Fei,Cheng, Weiguo,et al. Tailoring Molecular Weight of Bioderived Polycarbonates via Bifunctional Ionic Liquids Catalysts under Metal-Free Conditions[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2018,6(2):2684-2693.
APA Ma, Congkai,Xu, Fei,Cheng, Weiguo,Tan, Xin,Su, Qian,&Zhang, Suojiang.(2018).Tailoring Molecular Weight of Bioderived Polycarbonates via Bifunctional Ionic Liquids Catalysts under Metal-Free Conditions.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,6(2),2684-2693.
MLA Ma, Congkai,et al."Tailoring Molecular Weight of Bioderived Polycarbonates via Bifunctional Ionic Liquids Catalysts under Metal-Free Conditions".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 6.2(2018):2684-2693.
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