Sustainable rigid polyurethane foams based on recycled polyols from chemical recycling of waste polyurethane foams

ABSTRACT 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 depoly...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied polymer science 2019-09, Vol.136 (35), p.n/a
Main Authors: Shin, Se‐Ra, Kim, Han‐Na, Liang, Jing‐Yu, Lee, Sang‐Hyub, Lee, Dai‐Soo
Format: Article
Language:English
Subjects:
Addition polymerization
Adducts
Compressive strength
Deactivation
Depolymerization
Economic impact
Extinguishing
foams
Glycolysis
Isocyanates
Materials science
Organic chemistry
Physical properties
Plastic foam
Plastics industry
Polymers
Polyols
polyurethane
Polyurethane foam
Propylene oxide
recycling
Refrigerators
Thermal conductivity
Thermal insulation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ABSTRACT 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.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.47916