Composites prepared from the waterborne polyurethane cationomers-modified graphene. Part I. Synthesis, structure, and physicochemical properties

0442122 - ÚMCH 2016 RIV DE eng J - Journal Article
Król, P. - Król, B. - Pielichowska, K. - Špírková, Milena
Composites prepared from the waterborne polyurethane cationomers-modified graphene. Part I. Synthesis, structure, and physicochemical properties.
Colloid and Polymer Science. Roč. 293, č. 2 (2015), s. 421-431. ISSN 0303-402X. E-ISSN 1435-1536
R&D Projects: GA ČR(CZ) GA13-06700S
Institutional support: RVO:61389013
Keywords : polyurethane films * surface structure * AFM microscopy
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 1.890, year: 2015

In the reaction of 4,4′-methylenebis(phenyl isocyanate), polycaprolactone diol, and N-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.
Permanent Link: http://hdl.handle.net/11104/0245017