Departmental Papers (MSE)

Document Type

Journal Article

Date of this Version

December 2003


A coagulation method that provides better dispersion of SWNT in the polymer matrix has been used to produce single-walled carbon nanotube (SWNT)/poly(methyl methacrylate) (PMMA) composites. Optical microscopy and SEM show improved dispersion of SWNT in the PMMA matrix, which is a key factor in composite performance. Aligned and unaligned composites were made with purified SWNT with different SWNT loadings, from 0.1 to 7 wt%. Comprehensive testing shows improved elastic modulus, electrical conductivity, and thermal stability with addition of SWNT. The electrical conductivity of a 2 wt% SWNT composite decreases significantly (>105), when the SWNT is aligned and this result is discussed in terms of percolation.


Postprint version. "This is a preprint of an article published in Journal of Polymer Science Part B: Polymer Physics, Volume 41, Issue 24, 15 December 2003, pages 3333-3338."
Publisher URL:


single-walled carbon nanotube, SWNT, PMMA, thermoplastic, composites, alignment, nanocomposite, electrical conductivity, thermal stability



Date Posted: 31 July 2005

This document has been peer reviewed.