Organic–inorganic nanocomposite films made from polyurethane dispersions and colloidal silica particles

摘要: AbstractPolyurethane/silica nanocomposites were prepared by solution blending of polyurethane water dispersion (PUD) based on polycarbonate macrodiol with colloidal silica aqueous sol LUDOX TMA. Because mixing PUDs made from linear the nanofiller, only physical polymer/filler type interface formed hydrogen bonds was obtained. As a result materials possible to reuse after dissolution in acetone followed water. The effect content mechanical, thermal, morphological, and swelling properties obtained films tested tensile test, dynamic mechanical thermal analysis, thermogravimertic scanning electron microscopy, atomic force analyses. classified three groups differing internal structure functional properties: organic matrix filled inorganic nanofiller (up 10 wt% silica), bicontinous systems (25 32 silica) w...