Electrical and Damping Composite Films of MWCNTs/P (Styrene-Butylacryl) Prepared via in situ Copolymerization

Multi-walled carbon nanotubes (MWCNTs)/P(styrene-butyl acryl) composite latex was successfully synthesized by in-situ emulsion copolymerization to prepare MWCNTs/P(styrene-butyl acryl) composite film directly. The results by Raman spectra and FESEM showed that P(styrene-butyl acryl) copolymer molecules were combined assuredly with the surface of MWCNTs. MWCNTs coated with P(styrene-butyl acryl) could be dispersed in the emulsion evenly. Dynamic mechanical analysis showed that T_g, G′ and tanδ of the composites films were greater in the presence of MWCNTs. Specially the vibration damping property was enhanced at elevated temperatures, indicating the strong interaction between MWCNTs and P(styrene-butyl acryl) molecules to limit the motivation of P(styrene-butyl acryl) chains. The electrical conductivity increased with the adding of MWCNTs by 7 orders of magnitude on addition of 1.5 wt.% MWNTs. So the electrical and damping film has been prepared via in situ emulsion copolymerization.