Enzymatic synthesis of lignin derivable pyridine based polyesters for the substitution of petroleum derived plastics.
Nat Commun
; 10(1): 1762, 2019 04 16.
Article
en En
| MEDLINE
| ID: mdl-30992443
ABSTRACT
Following concerns over increasing global plastic pollution, interest in the production and characterization of bio-based and biodegradable alternatives is rising. In the present work, the synthesis of a series of fully bio-based alternatives based on 2,4-, 2,5-, and 2,6-pyridinedicarboxylic acid-derived polymers produced via enzymatic catalysis are reported. A similar series of aromatic-aliphatic polyesters based on diethyl-2,5-furandicarboxylate and of the petroleum-based diethyl terephthalate and diethyl isophthalate were also synthesized. Here we show that the enzymatic synthesis starting from 2,4-diethyl pyridinedicarboxylate leads to the best polymers in terms of molecular weights (Mn = 14.3 and Mw of 32.1 kDa when combined with 1,8-octanediol) when polymerized in diphenyl ether. Polymerization in solventless conditions were also successful leading to the synthesis of bio-based oligoesters that can be further functionalized. DSC analysis show a clear similarity in the thermal behavior between 2,4-diethyl pyridinedicarboxylate and diethyl isophthalate (amorphous polymers) and between 2,5-diethyl pyridinedicarboxylate and diethyl terephthalate (crystalline polymers).
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Plásticos
/
Poliésteres
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Piridinas
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Petróleo
/
Lignina
Idioma:
En
Año:
2019
Tipo del documento:
Article