engleski

Pre-treatment of CaCO3 nanofiller by irradiation method in presence of vinyl monomers for PVAc composites

We have performed irradiation with g - 60Co in the presence of vinyl monomer in order to modify the calcium carbonate nanofiller surface. We have also investigated how the nanocomposite preparation i.e. by simple mixing with poly(vinyl acetate) matrix and/or in situ polymerisation in the presence of nanofiller influences the properties of the PVAc composites. The organic coating on the surface of inorganic filler could in some cases act as a coupling agent between filler and matrix. We repost on: a) chemical interaction between the CaCO3 nanoparticles and organic coating create during irradiation in the presence of selected vinyl monomer ; b) morphological changes induced by the addition of CaCO3 unmodified and irradiation modified nanoparticles in PVAc matrix ; c) mechanical and thermal properties of the nanocomposite with PVAc matrix ; d) effect of the way of composite preparation. Fourier-transform infrared (FTIR) and/or X-ray photoelectron spectroscopy (XPS) were applied for the filler surface characterisation and for interactions filler/coatings. The conclusions about the changes at filler surface after the treatment and its influence on the interphase in composite followed by the changes in the properties were drown.

pre-treatment of CaCO3 nanofiller; irradiation method; FTIR; PVAc comnposites; mechanical properties;

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