Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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The Relationship between Blowing Agents and Inner Temperature at the Preparation of Flexible Polyurethane Forams

연질 폴리우레탄 발포체 제조에서 발포제와 내부 온도와의 관계

  • Lee, S.W. (National Institute of Technology and Quality) ;
  • Kim, J.H. (National Institute of Technology and Quality) ;
  • Kim, K.H. (National Institute of Technology and Quality) ;
  • Yang, Y.K. (National Institute of Technology and Quality) ;
  • Ahn, C.I. (National Institute of Technology and Quality) ;
  • Myong, Y.C. (National Institute of Technology and Quality)
  • 이석우 (국립기술품질원 유기화학과) ;
  • 김진흥 (국립기술품질원 유기화학과) ;
  • 김강호 (국립기술품질원 유기화학과) ;
  • 양유경 (국립기술품질원 유기화학과) ;
  • 안종일 (국립기술품질원 유기화학과) ;
  • 명영찬 (국립기술품질원 유기화학과)
  • Published : 1999.06.30
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Abstract

The effect of blowing agents and inner temperature on the machanical properties of the flexible polyurethane foams were investigated. In the study used that chemical blowing agents is $H_2O$ and support blowing agents. CFC-11, HCFC-114b, dichloromethane, n-penthane, iso-pentane, cyclopentane. The flexible polyurethane foams were foamed by the density of $0.015{\pm}0.002g/cm^3$ and $0.024{\pm}0.002g/cm^3$ which were used in mechanical properties measurements. Inner temperature was measure as long as the preparation of the flexible polyurethane foams of each blowing agents. The density, tensile strength, elongation, tear strength, compression strength and compression set were measured after 48 hours hardening. The result of the study was optimized dichloromethane and cyclopentane at the support blowing agents.

본 연구에서는 연질 폴리우레탄 발포제 제조에서 여러 발포제와 내부온도, 기계적 물성과의 관계에 대해서 연구, 조사하였다. 발포제로는 물을 주발포제로 하여 보조발포제는 CFC-11(trichlorofluoromethane), HCFC-114b(dichlorofluoroethane), dichloromethane, n-pentane, iso-pentane, cyclopentane을 사용하였다. 기계적 물성을 측정하기 위하여 연질 폴리우레탄 발포제의 밀도가 $0.015{\pm}0.002g/cm^3$와 $0.024{\pm}0.002g/cm^3$인 두 종류의 발포제를 제조하였다. 연질 폴리우레탄의 발포제의 제조시 발포제별로 내부온도를 측정하였으며, 48시간 경과 후 밀도, 인장강도, 신장율, 인열강도, 압축강도, 압축영구변형률을 측정하였다. 연구 결과 dichloromethane과 cyclopentane이 보조발포제로 가장 적합하였다.

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