• Title/Summary/Keyword: Nano 입자

Search Result 1,078, Processing Time 0.027 seconds

Effects of Nano-Sized Inorganic Fillers on Polymerization and Thermal Degradation of Polyurethane Composites (나노사이즈 무기분말이 폴리우레탄복합체의 중합 및 열분해반응에 미치는 영향)

  • Lee, Joon-Man;Ahn, Won-Sool
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.11 no.3
    • /
    • pp.1027-1034
    • /
    • 2010

  • Effects of inorganic nano-powders on the polymerization and thermal degradation kinetics as well as the mechanical properties of polyurethane nano-composites were studied by both the measurement of polymerization temperature as a function of time and non-isothermal thermogravimetric analysis (TGA) as well as the Instron test. As the results from polymerization studies, the reaction rates of MMT-filled PU composites were faster than those of Ce500-filled ones, and moreover, the activation energies using Kissinger method for the thermal degradation of composites were calculated as 139.34 kJ/mol for the Ce500-filled PU composites and 91.12 kJ/mol for MMT-filled one, respectivel, exhibiting that MMT nano-powder seemed to be acting as the catalyst for both polymerization and degradation of PU composites. UTM result, however, showed that tensile strength at break of MMT-filled composites was much higher than that of Ce500-filled ones above the concentrations range of 5 phr in the composites.

  • https://doi.org/10.5762/KAIS.2010.11.3.1027 인용 PDF KSCI