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Effect of the Addition of Pentaerythritol or Sorbitol to the Glycolysis of Waste Polyurethane on Prepared Polyol Functionalities and Polyurethane Mechanical Properties  

Myoung, Kyo Lim (Division of Applied Chemistry and Biotechnology, Hanbat National University)
Kim, Min Gyu (Division of Applied Chemistry and Biotechnology, Hanbat National University)
Ko, Jang Myoun (Division of Applied Chemistry and Biotechnology, Hanbat National University)
Chun, Jong Han (Division of Applied Chemistry and Biotechnology, Hanbat National University)
Publication Information
Korean Chemical Engineering Research / v.46, no.6, 2008 , pp. 1039-1042 More about this Journal
Abstract
In order to increase a functionality, OH value, for a recycled polyol prepared from the glycolysis reaction of a waste polyurethane rigid foam(PUR), the effect of an addition of pentaerythritol(PEN, functionality(f)=4) or sorbitol(SOR, f=6) to the its glycolysis reactor on the prepared polyol functionality and the mechanical properties of the polyurethane prepared using it was investigated. The OH values increased from 2.2 for a virgin to 2.8 for the recycled polyol. There was an increase in the mechanical properties including dimensional stability for PUR prepared using the recycled polyol, in which the increased OHs provided higher crosslinking density during PUR synthesis. In addition, the amount of the recycled polyol in the polyol system increased to from 8 to 20 wt% to give better mechanical properties to the PUR.
Keywords
Polyurethane; Recycled Polyol; Functionality; Glycolysis; Pentaerythritol; Sorbitol;
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