PVC/MMT nanocomposites were prepared in suspension polymerization of vinyl chloride. MMT vinylated and neat were used. Both MMT - neat and vinylated - were rather well dispersed in PVC. Mechanical properties of nanocomposites were investigated and their structures were analysed by SEM and TEM methods. Comparison of mechanical properties showed slightly better elongation at break (+ 20 %) and tensile strength (+ 10 %) in case of nanocomposite with neat MMT. In case of vinylated MMT we found semi-intercalation (with the distance between MMT plates about 50 nm) and semi-exfoliation, confirmed by TEM images. Neat MMT formed regular parallel bands in PVC matrix (visible in high resolution SEM). The colours of plastified moulded pieces suggested an occuring of initial PVC degradation.

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1. Hybrid and other nanoparticles for vinyl chloride polymerisation nucleation