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

International Journal of Polymer Science - Tập 2013 - Trang 1-8 - 2013
Sergey Gaidukov1, Uģis Cābulis2, Karina Gromilova1, Velta Tupureina1, Agnese Grigaloviča1
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

Tóm tắt

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 duringin situmixing 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.

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International Journal of Polymer Science

Tập 2013

1-8

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