화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.24, No.2, 104-113, February, 2016
DOI10.1007/s13233-016-2021-9  Export Citation
Dimensionally stable and light-colored polyimide hybrid reinforced with layered silicate
Ki-Ho Nam1, 2, Sejeong Kim3, Jungkun Song4, Seungsu Baek4, Sang-Hyon Paek3, Bon-Cheol Ku2, and Haksoo Han1, 5, †
  • 1Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea
  • 2Carbon Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Eunha-ri san 101, Bondong-eup, Wanju-gun, Jeonbuk, 55324, Korea
  • 3Department of Chemical Engineering, Kyung Hee University, 1 Seocheon-Dong, Giheung-gu, Yongin Gyeonggi, 17104, Korea
  • 4Agency for Defense Development, Yuseong-gu, Daejeon, 34060, Korea
  • 5, Korea
E-mail:
Light-colored polyimide hybrids with a quaternary alkylammonium modified montmorillonite, Cloisite® 20A (C20A) were successfully synthesized via a solution intercalation method. The structural and morphological features of the PI/C20A hybrids were characterized by Fourier transform infrared (FTIR) spectroscopy, wide-angle X-ray diffraction (WAXD), field emission scanning electron microscopy (FE-SEM), and spherical aberration correction scanning transmission electron microscope (STEM). The dimensional stabilities were strongly dependent upon the chemical and morphological structures which were influenced by the Cloisite® 20A loading content. A critical Cloisite® 20A concentration was obtained for the evolution of both the structural and physical properties of the PI/C20A hybrids. The dynamic stress behaviors were investigated in situ by using the wafer bending method during thermal imidization of the softbaked PI/C20A hybrid precursor and thermally cured hybrid films using a thin film stress analyzer. The PI/C20A hybrid films exhibited stability at 510 °C, high glass transition and relatively low coefficient of thermal expansion, and an improved solvent resistance capacity.
Keywords:polyimide;Cloisite® 20A;dimensional stability;dynamic stress behavior;solvent resistance capacity
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