The influence of organically modified montmorillonite on rheological and thermal properties of waste polycarbonate was investigated. For the study, nanocomposites of PC and natural montmorillonite (Nanocor Nanomer PGW) or chemically modified clay (Nanocor Nanomer I.30P or Nanocor Nanomer I.44P) were prepared by melt blending in HAAKE roller-type mixer. Both used organoclays belong to group of quaternary ammonium modified montmorillonites. In all PC/Nanomer composites the concentration of clay was 5 wt%. The thermogravimetric analyze (TG) results show that thermal decomposition of organically modified montmorillonite starts in the range of 220-230ºC, while the thermal stability of PC/clay nanocomposites is much better and begins at 320ºC. The linear dynamic viscosoelasticity measurements shows that the PC/clay nanocomposites containing organically modified montmorillonite reveal strong thermal degradation, which may result from quaternary ammonium decomposition during the mixing processing and further initiates of matrix thermal degradation.

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