Sustainable rigid polyurethane foams based on recycled polyols from chemical recycling of waste polyurethane foams,Journal of Applied Polymer Science

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Sustainable rigid polyurethane foams based on recycled polyols from chemical recycling of waste polyurethane foams
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-05-02 , DOI: 10.1002/app.47916
Se‐Ra Shin ₁ , Han‐Na Kim ₁ , Jing‐Yu Liang ₁ , Sang‐Hyub Lee ₁ , Dai‐Soo Lee ₁

Affiliation

The preparation and characteristics of rigid polyurethane foams (RPUFs) based on recycled polyol obtained by glycolysis of waste RPUF scraps from end‐of‐life refrigerators were investigated. To deactivate the amine adducts derived from isocyanates, the recycled product obtained after depolymerization was chemically modified via addition polymerization of propylene oxide. Two kinds of recycled polyols with different hydroxyl values and viscosity were blended with conventional virgin polyether polyol to prepare the RPUFs. The effects of the recycled polyols on the physical properties of RPUFs such as cell structures, compressive strength, thermal conductivity, and limiting oxygen index were discussed. It was found that the RPUFs from recycled polyols showed superior compressive strength, thermal insulation property, and self‐extinguishing property compared with conventional control foam. The results of this study reveal that the recycled polyols could be used as feedstock for RPUFs with superior performance. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47916.

中文翻译：

可持续的硬质聚氨酯泡沫，其基于废聚氨酯泡沫的化学回收利用的回收多元醇

研究了基于再生多元醇的硬质聚氨酯泡沫（RPUF）的制备和特性，该再生多元醇通过对报废冰箱中的RPUF废料进行糖酵解而获得。为了使衍生自异氰酸酯的胺加合物失活，解聚后获得的循环产物通过环氧丙烷的加成聚合进行了化学改性。将两种具有不同羟基值和粘度的再循环多元醇与常规的纯聚醚多元醇混合，以制备RPUF。讨论了回收的多元醇对RPUFs物理性能的影响，例如孔结构，抗压强度，热导率和极限氧指数。发现回收的多元醇中的RPUF具有优异的抗压强度，隔热性能，与常规控制泡沫相比具有自熄性。这项研究的结果表明，回收的多元醇可以用作具有卓越性能的RPUF的原料。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学2019，136，47916。

更新日期：2019-05-02

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