RT info:eu-repo/semantics/article
T1 Influence of the dispersion of nanoclays on the cellular structure of foams based on polystyrene
A1 Ballesteros Agudo, Alberto
A1 Laguna Gutiérrez, Ester
A1 Cimavilla Román, Paula
A1 Puertas, María Luisa
A1 Esteban Cubillo, Antonio
A1 Santarén, Julio
A1 Rodríguez Pérez, Miguel Ángel
K1 Polystyrene
K1 Poliestireno
K1 Nanoclays
K1 Nanoarcillas
K1 Nanoparticles
K1 Nanopartículas
K1 22 Física
K1 25 Ciencias de la Tierra y del Espacio
AB In the present work blends of polystyrene (PS) with sepiolites have been pro-duced using a melt extrusion process. The dispersion degree of the sepiolites inthe PS has been analyzed by dynamic shear rheology and X-ray micro-computed tom ography. Sepiolites treated with quaternary ammonium salts(O-QASEP) are better dispersed in the PS matrix than natural sepiolites(N-SEP) or sepiolites organo-modified with silane groups (O-SGSEP). A perco-lated network is obtained when using 6.0 wt% of O-QASEP, 8.0 wt% of N-SEPand 10.0 wt% of O-SGSEP. It has been shown that multiple extrusion processeshave a negative effect on the polymer architecture. They produce a reductionin the length of the polymeric chains, and they do not lead to a better disper-sion of the particles in the polymer matrix. Foams have been produced using agas dissolution foaming process, where a strong effect of the dispersion degreeon the cellular structure of the different foams was found. The effects on thecellular structure obtained by using different types of sepiolites, different con-tents of sepiolites and different extrusion conditions have been analyzed. Thefoams produced with the formulations containing O-QASEP present the lowestcell size and the most homogeneous cellular structures.
PB Wiley
SN 0021-8995
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/48071
UL https://uvadoc.uva.es/handle/10324/48071
LA eng
NO Journal of Applied Polymer Science, 2021, e. 51373
NO Producción Científica
DS UVaDOC
RD 18-dic-2024