Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis of Polyurethane Foam at Room Temperature by Controlling the Gelling Reaction Time

겔화 반응 시간 조절을 통한 상온에서의 폴리우레탄 폼 합성

  • Lee, Hojoon (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Oh, Chungik (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Liow, Chi Hao (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Kim, Soyeon (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Han, Youngjoon (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Oh, Min-Seok (Poongsan R&D Institute) ;
  • Joo, Hyeong-Uk (Poongsan R&D Institute) ;
  • Chang, Soo-Ho (Poongsan R&D Institute) ;
  • Hong, Seungbum (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • 이호준 (한국과학기술원 신소재공학과) ;
  • 오충익 (한국과학기술원 신소재공학과) ;
  • ;
  • 김소연 (한국과학기술원 신소재공학과) ;
  • 한영준 (한국과학기술원 신소재공학과) ;
  • 오민석 ((주)풍산 기술연구원) ;
  • 주형욱 ((주)풍산 기술연구원) ;
  • 장수호 ((주)풍산 기술연구원) ;
  • 홍승범 (한국과학기술원 신소재공학과)
  • Received : 2020.09.04
  • Accepted : 2020.10.26
  • Published : 2020.12.10
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Abstract

We developed a processing recipe to synthesize flexible polyurethane foam with a pore size of 335 ± 107 ㎛. The gelling reaction time was varied from 0 to 30 minutes and the physical properties of the foam were evaluated. The gelling reaction where the polypropylene glycol and tolylene 2,4-diisocyanate (TDI) were reacted to form urethane prepolymer, proceeded until a chemical blowing agent, deionized water, was introduced. Fourier transform infrared (FT-IR) spectra showed that the composition of the foam did not change but the foam height reached a peak value when the gelling reaction time was 10 minutes. We found that increasing the gelling time lessened the coalescence and helped the formation of cells. Lastly, the repeatability of polyurethane foam was confirmed by one-way analysis of variance (ANOVA) by synthesizing ten identical polyurethane foams under the same experimental conditions, including the gelling reaction time. Overall, the new time parameter in-between the gelling and blowing reactions will give extra stability in manufacturing identical polyurethane foams and can be applied to various polyurethane foam processes.

Keywords

References

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