• Title/Summary/Keyword: environmental friendly EMC

Search Result 2, Processing Time 0.02 seconds

Study on Self-extinguishing Epoxy Resin Composition (자기소화성 에폭시 수지 조성물 연구)

  • Kim, Young Chul;Cha, Ok Ja;Kim, Kyung Man
    • Journal of Adhesion and Interface
    • /
    • v.11 no.4
    • /
    • pp.168-173
    • /
    • 2010
  • Flame retardant halogen containing compounds have been replaced as environmentally safe material which does not contain hazardous materials generating toxic gas. Self-extinguishing epoxy resin compositions have been studied in order to produce eco-friendly epoxy molding compound, which is used as insulating materials in semiconductor. We developed self-extinguishing epoxy resin compositions which do not contain halogen compounds with new epoxy resin (E3). The new epoxy molding compound (EMC-1) showed high flame resistance (UL-V0) and high thermal resistance ($451.9^{\circ}C$ at 5 wt% loss) enough to use as eco-friendly material.

Comparison of NPS Reduction at Yongsan Area Considering Spatio-Temporal Chnages in CN (CN의 시공간적 변화를 고려한 용산 물순환 환경도시계획의 비점오염물질 저감효과 비교)

  • Choi, Jae-Wan;Lee, Sung-Joon;Ryu, Ji-Chul;Shin, Dong-Seok;Lim, Kyoung-Jae
    • Journal of Environmental Science International
    • /
    • v.21 no.10
    • /
    • pp.1203-1212
    • /
    • 2012
  • Yongsan ward is located at central place connecting south and north ecology axis of seoul. Various environment-friendly Yongsan development could pose positive effects on NPS(non pollutant source) pollutant reductions and water quality improvement at Han-rive because BOD, T-N, and T-P NPS discharges took 90% of total pollutant from this area. In this study, direct runoff and NPS pollutant loads were evaluated before and after development using spatio-tamporal change in CN(curve number) and EMC(event mean concentration) data. It was found that direct runoff value is $23,584,724m^3$, and BOD, T-N and T-P loads are 104,456 kg/year, 111,483 kg/year and 7,500 kg/year under pre-development condition, respectively. Annual runoff, BOD, T-N and T-P reducing rate were 12.9%, 33.3%, 35.6% and 40.7% under integrated post-development condition, respectively. Based on the results obtained in this study, environment-friendly urban development could be achieved at Yongsan area.