Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Effects of the Reactive Flame-Retardant 3-(Hydroxyphenylphosphinyl)-Propanoic Acid Content on the Flame Retardancy of Epoxy Resins

반응성 난연제 3-HPP의 함량이 에폭시 수지의 난연성에 미치는 영향

  • Lee, Yong-Hun (Department of Organic Material Science and Engineering, Pusan National University) ;
  • Ye, Hyun-Ho (Department of Organic Material Science and Engineering, Pusan National University) ;
  • Lee, Young-Hee (Department of Organic Material Science and Engineering, Pusan National University) ;
  • Kim, Il-Jin (Department of Organic Material Science and Engineering, Pusan National University) ;
  • Lee, Dong-Jin (Korea Institute of Footwear and Leather Technology (KIFLT)) ;
  • Kim, Jung-Soo (Korea Institute of Footwear and Leather Technology (KIFLT)) ;
  • Lim, Hyung Mi (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Mun, So Youn (Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Kim, Han-Do (Department of Organic Material Science and Engineering, Pusan National University)
  • 이용훈 (부산대학교 유기소재시스템공학과) ;
  • 예현호 (부산대학교 유기소재시스템공학과) ;
  • 이영희 (부산대학교 유기소재시스템공학과) ;
  • 김일진 (부산대학교 유기소재시스템공학과) ;
  • 이동진 (한국신발피혁연구원) ;
  • 김정수 (한국신발피혁연구원) ;
  • 임형미 (한국세라믹연구원) ;
  • 문소윤 (한국세라믹연구원) ;
  • 김한도 (부산대학교 유기소재시스템공학과)
  • Received : 2020.11.04
  • Accepted : 2020.12.04
  • Published : 2020.12.31
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Abstract

Flame retardant epoxy resins with various phosphorus contents (0, 1, 2, and 3 wt%) were prepared by reacting reactive-type flame retardant (hydroxyphenylphosphinyl-propanoic acid) with epoxy prepolymer (diglycidyl ether of bisphenol A, YD-128) and curing with 4,4'-diaminodiphenylmethane (DDM). This study focused on the effect of phosphorus content on the thermal decomposition, flame retardancy, and impact strength of cured epoxy resins (samples: P0, P1, P2, and P3; the number represents the wt% of phosphorus). As the phosphorus content increased, the thermal decomposition temperatures (T10% and Tmax) of the samples decreased, whereas the char content in the range 410-800 ℃ increased. The limiting oxygen index (LOI) value of the cured epoxy samples increased from 23.0 to 30.0% with increasing the phosphorus content from 0 to 3 wt%. As the phosphorus content increased, the peak heat release rate (PHRR) and fire growth rate (FIGRA) decreased, whereas the time to reach the PHRR increased significantly. That is, the analysis result of the cone calorimeter demonstrated that the flame retardancy of the sample greatly improved with an increase in the phosphorus content. As a result of the UL-94 V test, sample P3 showed V-0 exhibiting complete flame retardancy. The impact strength of the cured sample increased considerably with increasing phosphorous content. These results indicated that sample P3 had perfect flame retardancy and excellent impact strength; therefore, it will have high applicability as a flame retardant material.

Keywords

Acknowledgement

It was supported by a Grant from the Fundamental R&D program for Mari-time hybrid composite industrialization project (10053826, Development of core material technology based marine composites) funded by the Ministry of Trade, Industry and Energy (MOTIE, Korea).

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