Article

Molecular motion, morphology, and thermal properties of multiwall carbon nanotube/polysilsesquioxane composite

  1. Siu-Ming Yuen1,
  2. Chen-Chi M. Ma1,*,
  3. Chih-Chun Teng1,
  4. Hsin-Ho Wu2,
  5. Hsu-Chiang Kuan3,
  6. Chin-Lung Chiang4

Article first published online: 24 JAN 2008

DOI: 10.1002/polb.21381

Issue

Journal of Polymer Science Part B: Polymer Physics

Journal of Polymer Science Part B: Polymer Physics

Volume 46, Issue 5, pages 472–482, 1 March 2008

Additional Information

How to Cite

Yuen, S.-M., Ma, C.-C. M., Teng, C.-C., Wu, H.-H., Kuan, H.-C. and Chiang, C.-L. (2008), Molecular motion, morphology, and thermal properties of multiwall carbon nanotube/polysilsesquioxane composite. J. Polym. Sci. B Polym. Phys., 46: 472–482. doi: 10.1002/polb.21381

Author Information

  1. 1

    Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu 30043, Taiwan

  2. 2

    Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsin-Chu 30055, Taiwan

  3. 3

    Department of Chemical Engineering, Far East University, 744 Tainan, Taiwan

  4. 4

    Department of Industrial Safety and Health, HungKuang University, Salu, Tai-Chung, Taiwan

*Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu 30043, Taiwan

Publication History

  1. Issue published online: 24 JAN 2008
  2. Article first published online: 24 JAN 2008
  3. Manuscript Accepted: 17 NOV 2007
  4. Manuscript Revised: 12 NOV 2007
  5. Manuscript Received: 6 MAY 2007

Funded by

  • National Science Council, Taiwan, Republic of China. Grant Number: NSC. 93-2216-F-007-022

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

View Full Article (HTML) Get PDF (940K)

Keywords:

  • glass transition;
  • molecular motion;
  • morphology;
  • multiwalled carbon nanotubes;
  • nanocomposites;
  • nanotechnology;
  • polysilsesquioxane

Abstract

Diglycidyl ether of bisphenol A (DGEBA)-bridged polyorganosiloxane precursors have been prepared successfully by reacting diglycidyl ether of bisphenol A epoxy resin with 3-aminopropyltriethoxysilane. Acid-modified and unmodified multiwalled carbon nanotube (MWCNT) were dispersed in the diglycidyl ether of bisphenol A-bridged polyorganosiloxane precursors and cured to prepare the carbon nanotube/diglycidyl ether of bisphenol A-bridged polysilsesquioxane (MWCNT/DGEBA-PSSQ) composites. The molecular motion of MWCNT/DGEBA-PSSQ nanocomposites was studied by high-resolution solid-state 13C NMR. Acid-modification can improve the affinity between MWCNT and the polymer matrix. The molecular motion of the DGEBA-PSSQ decreased with acid-modified MWCNT content. However, when unmodified MWCNT was used, the molecular motion of the DGEBA-PSSQ was increased. SEM and TEM microphotographs confirm that acid-modified MWCNT exhibits better dispersion than unmodified MWCNT in DGBEA-PSSQ. The dynamic mechanical properties of acid-modified MWCNT/DGBEA-PSSQ composites are more favorable than those of unmodified MWCNT. Tg of the DGEBA-PSSQ decreased from 174.0 °C (neat DGEBA-PSSQ) to 159.0 °C (1 wt % unmodified MWCNT) and 156.0 °C (1 wt % acid-modified MWCNT). The storage modulus (at 30 °C) of the DGEBA-PSSQ increased from 1.23 × 109 Pa (neat DGEBA-PSSQ) to 1.65 × 109 Pa (1 wt % acid-modified MWCNT). However, when unmodified MWCNT was used, the storage modulus of the DGEBA-PSSQ decreased to 6.88 × 108 Pa (1 wt % unmodified MWCNT). At high temperature, above 150 °C, storage modulus of nanocomposites was higher than that of neat polymer system. © 2008 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 46: 472–482, 2008

View Full Article (HTML) Get PDF (940K)