Depolymerization of End-of-Life Poly(lactide) via 4-Dimethylaminopyridine-Catalyzed Methanolysis

被引：54

作者：

Alberti, Christoph ^{[1
]}

Damps, Nicole ^{[1
]}

Meissner, Roderich R. R. ^{[1
]}

Enthaler, Stephan ^{[1
]}

机构：

[1] Univ Hamburg, Inst Anorgan & Angew Chem, Martin Luther King Pl 6, D-20146 Hamburg, Germany

来源：

CHEMISTRYSELECT | 2019年 / 4卷 / 23期

关键词：

Catalysis; Depolymerization; Methanolysis; Poly(lactide); Recycling; RING-OPENING POLYMERIZATION; POLYLACTIC ACID; WASTE MANAGEMENT; MOLECULAR-WEIGHT; PLASTIC WASTE; ALKYL LACTATE; LACTIC-ACID; BIODEGRADATION; DEGRADATION; POLY(L-LACTIDE);

D O I：

10.1002/slct.201901316

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The chemical recycling of end-of-life plastics/polymers can contribute to a more sustainable society. In this regard, the selective degradation (depolymerization process) leading to well-defined low molecular weight chemicals is a key feature of the chemical recycling. Based on that, we have investigated the depolymerization of end-of-life poly(lactide)-based (PLA) goods. In more detail, applying a combination of methanol and catalytic amounts of 4-dimethylaminopyridine (DMAP) end-of-life PLA was depolymerized to methyl lactate, a chemical which can be is used as "green" solvent or as starting material for new poly(lactide) products. With the assistance of microwave heating an excellent rate of depolymerization (>99%) was observed within short reaction times (10-20 min). Interestingly, a set of 16 PLA commodities was efficiently transformed to methyl lactate.

引用

页码：6845 / 6848

页数：4

共 83 条

[1]

Aguado J., 1999, FEEDSTOCK RECYCLING

[2]

Alberti C., UNPUB

[3] Depolymerization of End-of-Life Poly(bisphenol A carbonate) via Transesterification with Acetic Anhydride as Depolymerization Reagent [J].