Aliphatic polycarbonate-based polyurethane elastomers and nanocomposites. I. The influence of hard-segment content and macrodiol-constitution on bottom-up self-assembly

0379085 - ÚMCH 2013 RIV US eng J - Journal Article
Špírková, Milena - Poreba, Rafal - Pavličevič, Jelena - Kobera, Libor - Baldrian, Josef - Pekárek, Michal
Aliphatic polycarbonate-based polyurethane elastomers and nanocomposites. I. The influence of hard-segment content and macrodiol-constitution on bottom-up self-assembly.
Journal of Applied Polymer Science. Roč. 126, č. 3 (2012), s. 1016-1030. ISSN 0021-8995. E-ISSN 1097-4628
R&D Projects: GA ČR GAP108/10/0195
Institutional research plan: CEZ:AV0Z40500505
Keywords : polyurethane elastomer * polycarbonate diol * nanocomposite
Subject RIV: CD - Macromolecular Chemistry
Impact factor: 1.395, year: 2012

Aliphatic polycarbonate-based polyurethane (PC-PU) elastomers and their nanocomposites with organic-modified clay (bentonite for organic system) were synthesized. Macrodiols (MD) (randomly copolymerized aliphatic PC-glycols of molecular weight of about 2000), hexamethylene diisocyanate, and butane-1,4-diol were used. Solid-state NMR and Fourier transform infrared spectroscopy, small-angle X-ray scattering, wide-angle X-ray diffraction, atomic force microscopy, and transmission electron microscopy were used for studying the bottom-up self-assembly of building units from the segmental level up that of organized structures of micrometer sizes. Contents of hard segments plays a dominant role for the degree of ordering and related phenomena but the constitution of the MD chain has only limited effect on PC-PU properties. The bentonite particles incorporate well in the structure and promote the ordering of hard segment domains in PC-PU matrix as compared with the nanofiller-free analogue.
Permanent Link: http://hdl.handle.net/11104/0007103