The selective recycling of mixed plastic waste of polylactic acid and polyethylene terephthalate by control of process conditions

被引：126
作者：
Sanchez, Arnau Carne [1 ]
Collinson, Simon R. [1 ]
机构：
[1] Cranfield Univ, Ctr Energy & Resource Technol, Sch Appl Sci, Cranfield MK43 0AL, Beds, England
来源：
EUROPEAN POLYMER JOURNAL | 2011年 / 47卷 / 10期
关键词：
Polyethylene terephthalate; Polylactic acid; Recycling; Catalyst; Glycolysis; Mixed plastic waste; L-LACTIC ACID; POLY(L-LACTIC ACID); THERMAL-DEGRADATION; MOLECULAR-WEIGHT; DEPOLYMERIZATION; POLYMERS; PET; METHANOLYSIS; GLYCOLYSIS; KINETICS;
D O I：
10.1016/j.eurpolymj.2011.07.013
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The glycolysis of postconsumer polyethylene terephthalate (PET) waste was evaluated with catalysts of zinc acetate, zinc stearate and zinc sulfate, showing that zinc acetate was the most soluble and effective. The chemical recycling by solvolysis of polylactic acid (PLA) and PET waste in either methanol or ethanol was investigated. Zinc acetate as a catalyst was found to be necessary to yield an effective depolymerization of waste PLA giving lactate esters, while with the same reaction conditions PET remains as an unconverted solid. This provides a strategy to selectively recycle mixed plastic waste by converting one plastic to a liquid and recovering the unreacted solid plastic by filtration. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1970 / 1976
页数：7
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