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Functionalized polyesters derived from glycerol: Selective polycondensation methods toward glycerol-based polyesters by different catalysts
被引:18
|作者:
Zeng, Fenfen
[1
]
Yang, Xin
[1
]
Li, Dexing
[1
]
Dai, Li
[1
]
Zhang, Xinyan
[1
]
Lv, Yin
[1
,2
]
Wei, Zhong
[1
,2
]
机构:
[1] Shihezi Univ, Sch Chem & Chem Engn, Shihezi 832003, Peoples R China
[2] Shihezi Univ, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China
基金:
中国国家自然科学基金;
关键词:
DICARBOXYLIC-ACIDS;
POLYMERIZATION;
ROUTE;
DIOLS;
D O I:
10.1002/app.48574
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
Convergence of biodegradability and functionality is a major direction of new generation bio-based materials. Functionalized aliphatic polyesters based on glycerol are synthesized by solvent-free polycondensation directly. The aim is to prepare linear polyesters with pendant hydroxyl groups along the polymer backbone. The performance of the sustainable biocatalyst Novozyme-435 (an immobilized form of Candida antarctica lipase B) and the metal-based catalyst scandium trifluoromethanesulfonate (also known as scandium triflate) were compared with three organobase catalysts: 1,5,7-triazabicyclo[4,4,0]dec-5-ene, diphenyl hydrogen phosphate, and bis(1,1,2,2,3,3,4,4,4-nonafluoro-1-butanesulfonyl)imide. For the five catalytic systems, the efficiency and selectivity for the incorporation of glycerol were studied, mainly using H-1 NMR spectroscopies, whereas side reactions, such as different macromolecular architecture of different glyceride groups in polymers, were evaluated using C-13 NMR. Especially, the biocatalyst Novozyme-435 succeeded in incorporating glycerol in a selective way with a low reaction temperature, leading to close-to-linear polyesters. By using a renewable hydroxyl-reactive based on polyesters derived from glycerol, it provides a theoretical reference for the synthesis of functional bio-based materials. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48574.
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