title: Enhanced dispersion of carbon nanotubes in hyperbranched polyurethane and properties of nanocomposites.
abstract: Hyperbranched polyurethane (HBPU) nanocomposites with multi-walled carbon nanotubes (MWNTs) were prepared by in situ polymerization on the basis of poly(ε-caprolactone)diol as the soft segment, 4,4'-methylene bis(phenylisocyanate) as the hard segment, and castor oil as the multifunctional group for the hyperbranched structure. A dominant improvement in the dispersion of MWNTs in the HBPU matrix was found, and good solubility of HBPU-MWNT nanocomposites in organic solvents was shown. Due to the well-dispersed MWNTs, the nanocomposites resulted in achieving excellent shape memory properties as well as enhanced mechanical properties compared to pure HBPU.
authors: Department of Textile Engineering, Konkuk University, Seoul 143-701, Korea.
authors: Sravendra
authors: S
authors: Rana
authors: Niranjan
authors: N
authors: Karak
authors: Jae Whan
authors: JW
authors: Cho
authors: Young Ho
authors: YH
authors: Kim