Preparation & Properties of the Flame Retarded NBR Foams with Phosphorus/Nitrogen-Containing Flame Retardants

인/질소계 난연제를 포함한 난연 NBR 발포체의 제조 및 특성

  • Jo, Byung-Wook (Division of Chemical and Polymer Sci. & Eng., Chosun Univ.) ;
  • Moon, Sung-Chul (Division of Chemical and Polymer Sci. & Eng., Chosun Univ.) ;
  • Choi, Jae-Kon (Division of Chemical and Polymer Sci. & Eng., Chosun Univ.)
  • 조병욱 (조선대학교 공과대학 화학.고분자공학부) ;
  • 문성철 (조선대학교 공과대학 화학.고분자공학부) ;
  • 최재곤 (조선대학교 공과대학 화학.고분자공학부)
  • Published : 2004.06.30

Abstract

The flame retarded NBR foams were prepared with metal hydroxides and various phosphorus/nitrogen-contain ing flame retardants. The dependency of the phosphorus content on thermal properties, flame retardancy, smoke density, and foaming properties were investigated in the foams. Foaming properties and morphology of the flame retarded NBR foams with P/N flame retardants( ${\le}10 phr$) were similar to those of the foams without P/N ones but containing metal hydroxides The flame retardancy of the foams was improved with increasing the phosphorus content and char formation under combustion atmosphere. The cone-calorimeter test and LOI index were also coincided with the TGA analysis quite well. The heat release rate (HRR), total heat release (THR), and effective heat of combustion (EHC) were decreased, whereas the carbon monoxide yield was increased with increase of the phosphorus content of P/N flame retardant. The smoke density values were closely related with CO yield values obtained by the cone-calorimeter test due to the high and hard char formation.

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