Investigation into Visco-elastic Properties of 100% Solids Polyurethane-Nanoclay Coating

Authors

1 Polymer Engineering and Color Technology Department, Amirkabir University of Technology

2 Department of Polymer Engineering and Color Technology, Amirkabir University of Technolog

Abstract

Nanoclay, Cloisite 20A, in 0, 0.5, 1, 2 and 3 w% were dispersed by mechanical and Ultra sonic mixing method in polyester-ether vehicle in the same conditions. Then solvent free aromatic isocyanate hardener was added in the above specimens stoichiometrically in order to synthesize nanocomposites. The X-Ray Diffraction (XRD) analysis and Transmission Electron Microscopy (TEM) indicate that the nanoclay has intercalated in the 100% Solid Polyurethane. Results of Dynamic Mechanical Thermal Analysis (DMTA) show that nanoclay content increases the thermal transition (Tg) for nanocomposite specimens, while the storage modulus decreases due to decrease of cross linking density of nanocomposites.

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