| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7826270 | Reactive and Functional Polymers | 2018 | 9 Pages |
Abstract
Development of a novel recycling process of waterborne polyurethane (WBPU) with a poly(oxytetramethylene)glycol (PTMG) soft segment was performed using characteristics of nitroxyl radical (TEMPO) dormant bond. A TiO2/hindered amine light stabilizer (HALS) combination produced the dormant bond in a 24â¯h UV irradiated WBPU. The WBPU extraction rate was 66% with a water-ethanol solvent, and its bond was found to contain a PTMG sequence by Py-GC/MS measurement. The binary blend of extracted WBPU and PTMG was immiscible and converted to miscible one by thermal treatment at 120â¯Â°C for 0.5â¯h in nitrogen. The WBPU was partially graft-polymerized onto the PTMG by the treatment and worked as a compatibilizer. The change to miscibility showed that the blend was recyclable as PTMG material.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hisayuki Nakatani, Tomohiro Nakamura, Suguru Motokucho,