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International Journal of Polymer Science
Volume 2013, Article ID 834595, 8 pages
Research Article

Preparation and Structural Properties of Free Films from Rapeseed Oil-Based Rigid Polyurethane-Montmorillonite Nanocomposites

1Institute of Polymer Materials, Riga Technical University, 14/24 Azenes Strasse, Riga, LV 1048, Latvia
2Latvian State Institute of Wood Chemistry, 27 Dzerbenes Strasse, Riga, LV 1006, Latvia

Received 21 February 2013; Revised 3 June 2013; Accepted 3 June 2013

Academic Editor: Yulin Deng

Copyright © 2013 Sergey Gaidukov et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The preparation of free standing films of biobased rigid polyurethanes (PU) from rapeseed oil (RO) and diethanolamine (DEA) polyol and its modification with organomontmorillonite (OMMT) nanoparticles are described. Heat enthalpy of the interaction during in situ mixing of RO/DEA polyol and OMMT is measured in isothermal profile. The Fourier transform infrared spectral analysis (FTIR-ATR) is used to determine the urethane group concentration and hydrogen bonds formation in PU and PU/OMMT nanocomposites. X-ray diffraction shows the formation of intercalated and exfoliated structures of OMMT. The glass-transition temperature is used to demonstrate the formation for the intercalated and exfoliated nanocomposites of an interphase with a possible compact structure and the altered polymer chain mobility. The prepared PU/OMMT nanocomposites are also characterized by the enhanced thermal degradation characteristics upon heating in air atmosphere.