title: Composites prepared from the waterborne polyurethane cationomers-modified graphene. Part I. Synthesis, structure, and physicochemical properties.
abstract: In the reaction of 4,4'-methylenebis(phenyl isocyanate), polycaprolactone diol, andN-methyldiethanolamine, they were synthesized aqueous dispersions of polyurethane cationomers, from which films were prepared after adding 0-2 wt% graphene. In order to obtain nanocomposites, graphene was previously noncovalent functionalized in tetrahydrofurane in the field of ultrasound. The chemical structure and the morphology of obtained nanocomposites were analyzed by IR spectroscopy, atomic force microscopy (AFM), and differential scanning calorimetry (DSC) microcalorimetry methods. It was found that the presence of graphene results in increased thermal and mechanical strength of received polymer films and contributes to the increase in hydrophobicity of generally hydrophilic coatings prepared from waterborne polyurethane cationomers. Based on received results, possible interactions between graphene and phase structure of polyurethane cationomers were discussed. Relating to the so far described applications of graphene for the modification of polyurethanes, the novelty of this work is the concept of incorporation of graphene particles to polyurethane cationomer chains exclusively through a simple noncovalent functionalization and to investigate the effect of graphene on the properties obtained in this way of thin polyurethane film.
authors: Department of Polymer Science, Faculty of Chemistry, Rzeszów University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, Poland.
authors: Piotr
authors: P
authors: Król
authors: Department of Polymer Science, Faculty of Chemistry, Rzeszów University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, Poland.
authors: Bożena
authors: B
authors: Król
authors: Department of Biomaterials, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland.
authors: Kinga
authors: K
authors: Pielichowska
authors: Nanostructured Polymers and Composites Department, Institute of Macromolecular Chemistry AS CR, vvi, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic.
authors: Milena
authors: M
authors: Špírková
keywords: AFM microscopy; Mechanical properties; Polyurethane films; Surface free energy parameters; Surface structure; Thermal properties
references: Science. 2004 Oct 22;306(5696):666-9
references: 15499015
references: Colloid Polym Sci. 2010 Aug;288(12-13):1255-1269
references: 20927181
references: Colloid Polym Sci. 2014;292:1051-1059
references: 24817782