Article
  • Synthesis and Characterization of Montmorillonite-Epoxy Nanocomposites
  • Ryu JG, Park GR, Lyu SG, Rhew JH, Sur GS
  • 몬모릴로나이트-에폭시 나노복합재료 합성 및 특성
  • 류정걸, 박근륙, 유성구, 류종하, 서길수
Abstract
A montmorillonite-epoxy nanocomposite has been prepared by dispersing organically modified montmorillonite in an epoxy resin (diglycidyl ether of bisphenol A (DGEBA)) at elevated temperatures. Molecular dispersion of montmorillonite within the crosslinked epoxy matrix was verified using X-ray diffraction and transmission electron microscopy indicated that the final product contains a uniform dispersion of exfoliated 10 Å thin clay layers seperated by 100∼150Å of polyether polymer, thus verifying the nanocomposite structure. Differential scanning calorimetry studies of a nanocomposite containing 5wt% stearylammonium-montmorillonite indicated the heat of reaction and activation energy for the polymerization reaction to be 462 J/g and 98.2 kJ/mol, respectively.

스테아릴암모늄 브로마이드와 반응시킨 몬모릴로나이트를 에폭시수지 단량체(diglycidyl ether of bisphenol A (DGEBA))와 혼합한 후, 고온 경화 반응시켜 몬모릴로나이트-에폭시 나노복합재료를 합성하였다. 합성한 나노복합재료를 X-선 회절 실험과 투과전자현미경을 통하여 관찰한 결과 에폭시 매트릭스내에 몬모릴로나이트의 실리케이트층이 한층 한층 균일하게 분산되어 있음을 확인하였다. 그리고 각각의 층간거리는 100∼150Å정도였다. 열시차분석기를 이용하여 5 wt%의 스테아릴암모늄-몬모릴로나이트가 분산되어 있는 나노복합재료 합성시 중합열과 중합반응시 활성화 에너지를 확인한 결과 각각 462J/g과 98.2kJ/mol였다.

Keywords: nanocomposite; intercalation; exfoliation; montmorillonite; epoxy

References
  • 1. Theng BKGFormation and Properties of Clay-Polymer Complexes, Elsevier, New York (1979)
  •  
  • 2. Theng BKGThe Chemistry of Clay-Organic Reactions, Adam Hilger, Ltd., London (1974)
  •  
  • 3. Blumstein A, J. Polym. Sci. A: Polym. Chem., 3, 2653 (1965)
  •  
  • 4. Kanatzidis MG, Wu C, J. Am. Chem. Soc., 111, 4139 (1989)
  •  
  • 5. Divigalpitiya WMR, Frindt RF, Morrison SR, J. Mater. Res., 6, 1103 (1991)
  •  
  • 6. Pillion JE, Thompsen ME, Chem. Mater., 2, 222 (1991)
  •  
  • 7. Okada A, Kawasumi M, Usuki A, Kojima Y, Kurauchi T, Kumigaito O, Mater. Res. Soc. Symp. Prod., 171, 45 (1990)
  •  
  • 8. Kojima Y, Usuki A, Okada A, Kawasumi M, Okada A, Kurauchi T, Kumigaito O, J. Polym. Sci. A: Polym. Chem., 31, 983 (1993)
  •  
  • 9. Usuki A, Kojima Y, Okada A, Kawasumi M, Okada A, Fukushima Y, Kurauchi T, Kumigaito O, J. Mater. Res., 8, 1179 (1993)
  •  
  • 10. Wang MS, Pinnavaia TJ, Chem. Mater., 6, 468 (1994)
  •  
  • 11. Lan T, Kaviratna PD, Pinnavaia TJ, Chem. Mater., 7, 2144 (1995)
  •  
  • 12. Lan T, Kaviratna PD, Pinnavaia TJ, Chem. Mater., 6, 573 (1994)
  •  
  • 13. Lan T, Pinnavaia TJ, Chem. Mater., 6, 2216 (1994)
  •  
  • 14. Burnside SD, Giannelis EP, Chem. Mater., 7, 1597 (1995)
  •  
  • 15. Giannelis EP, Adv. Mater., 8, 20 (1996)
  •  
  • 16. Sur GS, Ryu JG, Lyu SG, Polym.(Korea) Abstract, 22(2), 139 (1997)
  •  
  • 17. Ryu JG, Lyu SG, Shin BY, Sur GS, Polym.(Korea) Abstract, 22(2), 204 (1997)
  •  
  • 18. Ryu JG, Lyu SG, Sur GS, Korean Ind. Eng. Chem. Abstract, 242 (1997)
  •  
  • 19. Grim REClay Mineralogy, McGraw-Hill, New York (1953)
  •  
  • 20. Private Communication with Dr. J.W. Lee
  •  
  • 21. Prime RBThermal Characterization of Polymeric Materials, E. Turi, Ed., Academic, New York (1981)
  •  
  • 22. Prime RB, Polym. Eng. Sci., 13, 365 (1973)
  •  
  • 23. Ozawa TJ, Therm. Anal., 2, 301 (1970)
  •  
  • 24. Swarim SJ, Wims AM, Anal. Calorim, 4, 155 (1976)
  •  
  • 25. Cizemciogly M, Gupta A, SAMPLE Q., Apr., 16 (1982)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1998; 22(2): 328-334

    Published online Mar 25, 1998