Effects of Carbon Nanotube Functionalization on the Mechanical Properties of Vinyl Ester Composites
Chemically functionalized muliti-walled carbon nanotubes (MWCNTs)/vinyl ester resin (VE) nanocomposites were prepared. MWCNTs were first treated by H2SO4/HNO3 acid mixture, and then carboxylated MWCNTs were grafted of methacrylic acid glycidyl ester (GMA). Raman microscopy and Fourier transform infrared spectroscopy (FT-IR) analyses proved the effectivenss of acid-treatment and chemical functionalization. Furthermore, chemical functionalization did not greatly disrupt carbon nanotubes structure and Transmission electron microscopy (TEM) showed that there was a GMA thin layer on the MWCNTs surface, which contributes to the homogenous dispersion of MWCNTs in vinyl ester resin matrix and the CNTs-VE interfacial interaction. Thus the nanocomposites containing MWCNT-GMA possess larger storage modulus values as well as higher glass transition temperatures (Tg).
Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He
H. Y. Chen et al., "Effects of Carbon Nanotube Functionalization on the Mechanical Properties of Vinyl Ester Composites", Advanced Materials Research, Vols. 233-235, pp. 2315-2318, 2011