Yuen, Siu-Ming and Ma, Chen-Chi M. and Chiang, Chin-Lung and Teng, Chih-Chun and Yu, Yi-Hsiuan (2008) Poly(vinyltriethoxysilane) modified MWCNT/polyimide nanocomposites - Preparation, morphological, mechanical, and electrical properties. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 46 (3). pp. 803-816.
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Official URL: http://dx.doi.org/10.1002/pola.22425
Multi-walled carbon nanotube (MWCNT) modified by vinyltriethoxysilane (VTES) via free radical reaction has been prepared (poly (vinyltriethoxysilane) modified MWCNTs, PVTES-MWCNT). Precursor of polyimide, polyamic acid has been synthesized by reacting 4,4'-oxydianiline with 3,3',4,4'-benzophenone tetracarboxylic dianhydride. PVTES-MWCNT were then mixed with polyamic acid and heated to 300 degrees C to form CNT/polyimide composite. During the imidization processes, the silanes on CNT surface reacted with each other and may be connected together by covalent bond (Si-O-Si). The PVTES-MWCNT was analyzed by Fourier transform infrared and X-ray photoelectron spectroscopy. The PVTES-MWCNT/polyimide composites were analyzed by CP/MAS solid state Si-29 nuclear magnetic resonance (NMR) spectroscopy. Morphological properties of the PVTES-MWCNT/polyimide composites were investigated by scanning electron microscope and transmission electron microscope. Electrical conductivity increased dramatically comparing to the unmodified MWCNT/polyimide composites. Mechanical properties of nanocomposite were enhanced significantly by PVTES-MWCNT. (C) 2007 Wiley Periodicals, Inc.
|Uncontrolled Keywords:||mechanical properties; nanocomposites; polyimide; Raman spectroscopy; TEM|
|Subjects:||Material Science > Nanofabrication processes and tools|
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Deposited By:||Anuj Seth|
|Deposited On:||12 Jan 2009 15:35|
|Last Modified:||12 Jan 2009 15:35|
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