Combustion-Retardation Properties of Low Density Polyethylene and Ethylene Vinyl Acetate Mixtures with Magnesium Hydroxide

수산화마그네슘이 첨가된 저밀도 폴리에틸렌과 에틸렌 비닐 아세테이트 혼합물의 난연성

  • Chung, Yeong-Jin (Department of Fire Protection Engineering, Kangwon National University) ;
  • Lim, Hyung Mi (Eco-composite Materials Center, Green Ceramics Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Jin, Eui (Fire & Disaster Prevention Research Center, Kangwon National University) ;
  • Oh, JungKyoo (Fire & Disaster Prevention Research Center, Kangwon National University)
  • 정영진 (강원대학교 소방방재공학과) ;
  • 임형미 (한국세라믹기술원) ;
  • 진의 (강원대학교 소방방재연구센터) ;
  • 오정규 (강원대학교 소방방재연구센터)
  • Received : 2011.07.12
  • Accepted : 2011.07.26
  • Published : 2011.08.10

Abstract

It was performed to test the combustive properties of low density polyethylene and ethylene vinyl acetate (LDPE-EVA) mixture by the addition of magnesium hydroxide. Flame retardant of natural magnesium hydroxide was added to the mixture of LDPE-EVA in 40 to 80 wt% concentration. The composite was compounded to prepare specimen for combustive analysis by cone calorimeter (ISO 5660-1). Comparing with virgin LDPE-EVA, the specimens including the magnesium hydroxide had lower combustive properties. It is supposed that the combustion-retardation properties in the composites improved due to the endothermic decomposition of magnesium hydroxide. The specimens with magnesium hydroxide showed both the lower peak heat release rate (PHRR) and lower effective heat of combustion (EHC) than those of virgin polymer. As the magnesium hydroxide content increases, time to ignition increased and the peak heat release rate decreased.

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