سال انتشار: ۱۳۹۰

محل انتشار: کنفرانس بین المللی فرآورش پلیمرها

تعداد صفحات: ۴

نویسنده(ها):

s Malmir – Institute of Polymeric Materials, Polymer Engineering Department, Sahand University of Technology, Sahand New Town, Tabriz Iran P.C:51335-1996
m Hemmati – Research Institute of Petroleum Industries, RIPI, Tehran, Iran
M.K Razavi Aghjeh – Institute of Polymeric Materials, Polymer Engineering Department, Sahand University of Technology, Sahand New Town, Tabriz Iran P.C:51335-1996
r Ahmadi Tehrani – Institute of Polymeric Materials, Polymer Engineering Department, Sahand University of Technology, Sahand New Town, Tabriz Iran P.C:51335-1996

چکیده:

The main objective of the present work was to use linear viscoelastic properties in evaluating of the morphology of the clay and its partitioning in PA/PE/Clay blend nanocomposites. Using the rheological analysis, it was concluded that the clay can be intercalated in PA phase leading to form a three dimensional network, while it showed no affinity to PE which was not also improved using PE-g-MA compatibilizer. These results were confirmed by XRD analysis. Using rheological and XRD analysis it was shown that the clay exhibited higher dispersion in PA/PE blends than that in pure PA. It was attributed to the detachment of intercalated clay layers due to the stress transfer of PE particles and deformation flow field created between PE particles, leading to formation of stronger network. The presence of PE-g-MA further enhanced the clay dispersion in the blend and increased its affinity to PE particles, which let the clay layers to be located preferentially near the blend interface. While the results of XRD were not able to accurately assess the morphology, using rheological analysis it was predicted that if the clay is first compounded with dispersed PE phase (PE+PE-g-MA), the clay could not leave the PE phase but PA diffuses to the composite droplets of PE/Clay to form phase within phase within phase morphology. SEM and TEM analyses confirmed the reliability of the predicted morphology. It was demonstrated that the rheological studies has a reliable sensitivity to the clay dispersion, its localization and phase morphology of blend nanocomposites.