Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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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

폐 폴리우레탄의 해중합 시 첨가된 pentaerythritol과 sorbitol이 재생 폴리올의 작용기 및 폴리우레탄의 기계적 물성에 미치는 영향

  • 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)
  • 명교림 (한밭대학교 응용화학생명공학부) ;
  • 김민규 (한밭대학교 응용화학생명공학부) ;
  • 고장면 (한밭대학교 응용화학생명공학부) ;
  • 전종한 (한밭대학교 응용화학생명공학부)
  • Received : 2008.10.08
  • Accepted : 2008.10.15
  • Published : 2008.12.31
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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.

폐폴리우레탄의해중합에의하여제조된재생폴리올의작용기를증가시키기위하여해중합시첨가한 pentaerythritol(PEN, 작용기(f)=4) 또는 sorbitol(SOR, f=6)이 생성된 재생 폴리올의 작용기와 이를 사용하여 제조한 경질 폴리우레탄폼(polyurethane rigid foam; PUR)의 기계적 물성에 미치는 영향을 조사하였다. PEN 또는 SOR를 첨가한 경우 OH 작용기가 2.2에서 약 2.8로 증가하였고, PUR의 치수안전성 등을 비롯한 기계적 물성이 크게 향상됨을 확인하였다. 이러한 결과는 폴리올의 작용기가 증가하여 제조한 PUR의 가교밀도를 향상시킨 것으로 해석되었다. 또한 재생 폴리올의 폴리올 시스템에 대한 사용량을 8 wt%에서 약 20 wt%로 증가시킬수 있었다.

Keywords

References

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