RT info:eu-repo/semantics/article
T1 In-situ understanding of pore nucleation and growth in polyurethane foams by using real-time synchrotron X-ray tomography
A1 Pérez Tamarit, Saúl
A1 Solórzano Quijano, Eusebio
A1 Mokso, Rajmund
A1 Rodríguez Pérez, Miguel Ángel
K1 Polyurethane
K1 Poliuretano
K1 Tomography
K1 Tomografía
K1 Porous polymers
K1 Polímeros porosos
AB The nucleation and growth of pores in PU foams have been visualized and quantified for the first time in 4D using in-situ tomographic microscopy. Acquiring sequences of 3D images in 156 ms each, we describe homogeneous and heterogeneous nucleation and subsequent bubble growth dynamics for materials with and without nucleating nanoparticles. Exploiting the time resolved tomographic sequences we obtained the bubble nucleation rate, bubble density and size evolution, based on which the diffusion coefficient of gas molecules in polymer can be calculated, evidencing the reduction of diffusivity provoked by the inclusion of nanoparticles. We found that nucleation and growth are in a large extend decoupled in time.
PB Elsevier
SN 0032-3861
YR 2019
FD 2019
LK https://uvadoc.uva.es/handle/10324/49462
UL https://uvadoc.uva.es/handle/10324/49462
LA eng
NO Polymer, 2019, vol. 166. p. 50-54
NO Producción Científica
DS UVaDOC
RD 08-ago-2024