Journal
RSC ADVANCES
Volume 4, Issue 40, Pages 20761-20768Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra00116h
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Funding
- Spanish Ministry of Science and Innovation
- FEDER funds [MAT2009-14001-C02-01, MAT 2010-18749, MAT 2012-34901]
- Junta of Castille and Leon [VA035U13]
- European Space Agency [MAP AO-99-075]
- 7th Framework Program of E.U. through HARCANA [NMP3-LA-2008-213277]
- Juan de la Cierva by Ministry of Economy and Competitiveness [JCI-2011-09775]
- PIRTU contract by Junta of Castile and Leon
- European Social Fund [EDU/289/2011]
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The effect of carbon nanoparticles (CNPs) on the physical and chemical events taking place during the foaming evolution of flexible polyurethane (FPU) foams is analysed by in situ X-ray time-resolved imaging. The differences observed in the cellular structure and density evolution of nanocomposite foams are explained in terms of the type of nanoparticles and the functional groups on their surface. The presence of certain types of particles enhanced the bubble nucleation at the beginning of the process although some others did not. The chemical interaction seems to produce delays in the blowing reaction process and promotes coalescence events during foam evolution as regarding the cell density results obtained. This study on the kinetics of polymerisation and morphology development of reactive PU nanocomposite foams contributes to understanding the physical phenomena occurring as a consequence of the CNP-FPU chemical interaction.
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