Recovery of polyols from flexible polyurethane foam by "split-phase" glycolysis:: Glycol influence

被引：62
|
作者：
Molero, C [1 ]
de Lucas, A [1 ]
Rodríguez, JF [1 ]
机构：
[1] Univ Castilla La Mancha, Dept Chem Engn, Ciudad Real 13004, Spain
来源：
POLYMER DEGRADATION AND STABILITY | 2006年 / 91卷 / 02期
关键词：
polyol; polyurethane; recovery; glycolysis;
D O I：
10.1016/j.polymdegradstab.2005.05.008
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Scrap of flexible polyurethane foams from slabstock manufacturing comprises about 10% of the total production, leading to not only an environmental problem but also an economic one. The general purpose of polyurethane chemical recycling is to recover a valuable constituent, the polyol. Among the processes Suitable, glycolysis, and specially glycolysis in two phases seems to be the method that allows better quality products. In this study glycolysis of flexible polyurethane foams in "split phase" was conducted with different glycols, in order to study their activity and select a system to obtain the highest quality recovered polyol. Reaction kinetics and the products obtained were investigated. Times required to reach complete conversion. chemical properties of the polyol phase and its purity depended on the glycol employed. Diethylene glycol proved to be the most suitable glycol to obtain a high purity in the polyol phase. (c) 2005 Elsevier Ltd. All rights reserved.
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页码：221 / 228
页数：8
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