Comparing the effect of carbon-based nanofillers on the physical properties of flexible polyurethane foams
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Flexible polyurethane foams filled with a fixed amount of carbon-based nanofillers, in particular multiwall nanotubes and graphenes, have been studied to clarify the influence of the morphology and functional groups on the physical properties of these polymeric foams. The effect of the carbon nanoparticles on the microphase separation has been analyzed by FT-IR spectroscopy revealing a decrease in the degree of phase separation of the segments. Variations of the glass transition temperature and an improved thermal stability were observed due to the presence of the nanoparticles. The EMI shielding effectiveness of flexible PU foams has also been enhanced, in particular for FGS nanocomposite foams.
KeywordsFoam Hard Segment Soft Segment Polymer Foam Functionalized Graphene Sheet
The authors gratefully acknowledge the financial support of the Spanish Ministry of Science and Innovation (MICINN) through MAT 2010-18749 and MAT 2009-14001 CO2-01 and the 7th Framework Program of E.U. through HARCANA (NMP3-LA-2008-213277). MMB and SE also acknowledge the FPI and FPU programs from MICINN, respectively. I.H. is Research Director of the Research Science Foundation (FRS-FNRS), Belgium.
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