• Title/Summary/Keyword: Chemical effect

Search Result 12,733, Processing Time 0.05 seconds

Antioxidation Effect of Various Electrolyzed Water (여러 가지 전리수의 항산화 효과)

  • Lee Yoon Bae;Ryoo Kunkul;Lee Jongkwon;Lee Miyoung;Shin Eunjung;Sung Sichang;Ku Daechul
    • Proceedings of the KAIS Fall Conference
    • /
    • 2005.05a
    • /
    • pp.318-320
    • /
    • 2005
  • Antioxidation effect of reduced electrolyzed water, which has been known as antiaging agent has been investigated with very simple method. Antioxidation effect of the reaction of linoleic acid with oxygen has been measured and analyzed. Alkaline reduced electrolyzed waters are better effect, rather acidic oxidized electrolyzed waters accelerates oxidation reaction.

  • PDF

Effect of Poly(butyl acrylate)-Poly(methyl methacrylate) Rubber Particle Texture on the Toughening Behavior of Poly(methyl methacrylate)

  • Chung, Jae-Sik;Park, Kyung-Ran;Wu, Jong-Pyo;Han, Chang-Sun;Lee, Chan-Hong
    • Macromolecular Research
    • /
    • v.9 no.2
    • /
    • pp.122-128
    • /
    • 2001
  • Monodisperse composite latex particles with size of ca. 300 nm, which consist ofn-butyl acrylate as a soft phase and methyl methacrylate as a hard phase with different morphology, were synthesized by seeded multi-stage emulsion polymerization. Three types of composite latex particles including random-, core/shell-, and gradient-type particles were obtained by using different monomer feeding methods during semi-batch emulsion polymerization. Effect of poly(butyl acrylate)-poly(methyl methacrylate) rubber particle morphology on the mechanical and rheological properties of rubber toughened poly(methyl methacrylate) was investigated. Among three different rubber particles, the gradient-type rubber particle showed better toughening effect than others. No significant variation of rheological property of poly(methyl methacrylate)/rubber blends was observed for the different rubber particle morphology.

  • PDF

Aging effect of poly(vinyl alcohol) membranes with poly(acrylic acid-co-maleic acid) (PVA/PAM 막의 aging effect)

  • Hwang, Ho-Sang;Kim, Dae-Sik;Park, Ho-Bum;Rhim, Ji-Won;Lee, Young-Moo
    • Proceedings of the Membrane Society of Korea Conference
    • /
    • 2004.05b
    • /
    • pp.195-198
    • /
    • 2004
  • In our previous study, the crosslinked PVA/PAM membrane was prepared to investigate the pervaporation performance, and analyzed by FT-IR and water swelling test. This main objective of this work was to investigate the aging effect of PVA/PAM membrane with swelling time.(omitted)

  • PDF

Effect of a Silicone Defoamant on the Motion of Single Air Bubbles Rising in Lubricant

  • Shim, Joosup;Cho, Wonoh;Chung, Keunwoo;Kim, Woung Woon
    • KSTLE International Journal
    • /
    • v.1 no.1
    • /
    • pp.52-58
    • /
    • 2000
  • The velocity and motion of single air bubbles rising through lubricant have been experimentally investigated to test the effect of silicon defoamant The investigation reveals that the velocity is markedly retarded by the addition of small amount of silicone defoamant. This retardation of rising velocity of air bubbles is proposed by increasing of Drag force or reducing of Buoyancy force around the surfaces of the bubbles.

  • PDF