期刊
E-POLYMERS
卷 20, 期 1, 页码 214-225出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/epoly-2020-0016
关键词
enzymatic polymerization; bio-based polyester; polyketoester; post-modification; oxime click chemistry
资金
- National Natural Science Foundation of China [51903022]
A novel full bio-based ketone-containing aliphatic polyester was prepared by enzyme-catalyzed polycondensation of diethyl gamma-ketopimelate (DEK) with 1,6-hexanediol (HDO) using immobilized lipase B from Candida antarctica (CALB). The influences of polymerization conditions such as temperature, time, enzyme amount, and solvent amount on the molecular weight of poly(hexamethylene gamma-ketopimelate) (PHK) were investigated. New fully bio-based poly (hexamethylene gamma-ketopimelate-co-hexamethylene adipate) (poly(HK-co-HA)) copolymers with narrow polydispersity and well-defined composition were synthesized by copolymerization of DEK, HDO, and diethyl adipate. The structures of PHK and poly(HK-co-HA) copolymers were characterized by nuclear magnetic resonance, and their thermal characterization was examined by thermogravimetric analysis and differential scanning calorimetry. The degradation of PHK and poly(HK-co-HA) copolymers was studied. The post-polymerization modification of these polyketoesters via oxime click chemistry was further demonstrated.
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