01908nas a2200169   4500008004100000022001400041245010100055210006900156260007100225300001400296490000700310520122200317100002301539700002001562700002601582856013001608       2005                        eng d  a0897-475600aNoncovalent and nonspecific molecular interactions of polymers with multiwalled carbon nanotubes0 aNoncovalent and nonspecific molecular interactions of polymers w  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJUN  a3389-33970 v173 a<p>Polymer composites containing variable amounts of multiwalled carbon nanotubes (MWNTs) have been prepared using solution dispersion and melt-shear mixing. Various polymer composites with 1 wt % MWNTs have been found to dissolve homogeneously in organic solvents. The amount of polymer coated or wrapped MWNTs dissolved in the solution was quantified using UV-vis absorbance at 500 nm and the concentration ratio of [MWNTs](solution)/[MWNTs](composite) was close to 1. A nonspecific polymer adsorption through multiple-weak molecular interactions of CH groups with MWNTs in the composites has been identified through FTIR spectroscopy. The composites of polybutadiene with different wt % of MWNTs showed slight changes in the CH bending vibrations, indicating the presence of intermolecular CH-pi interactions. The dissolution of various polymer composites containing low concentration of MWNTs in organic solvents was attributed to polymer coating on the MWNTs via noncovalent and nonspecific CH-pi interactions. The dissolution of MWNTs in organic solvents using common polymers used in this study indicates that the coating or wrapping is a general phenomenon occurring between polymers and carbon nanotubes.</p>1 aBaskaran, Durairaj1 aMays, Jimmy, W.1 aBratcher, Matthew, S.  uhttps://library.ncl.res.in/content/noncovalent-and-nonspecific-molecular-interactions-polymers-multiwalled-carbon-nanotubes-1