Influence of the dispersion of Nanoclays on the cellular structure of foams based on polystyrene

In the present work blends of polystyrene (PS) with sepiolites have been produced using a melt extrusion process. The dispersion degree of the sepiolites in the PS has been analyzed by dynamic shear rheology and X‐ray micro‐computed tomography. 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 percolated...