Mechanical Properties of Coil Coating Evaluated with Dynamic Mechanical Analysis in Daul Cantilever
The storage modulus, loss modulus, loss tangent (tanδ), stress and strain have been determined for painted steel specimens by dynamic mechanical analysis (DMA) operated in Dual Cantilever mode. Analysis of the composite system enabled the elastic modulus of the paint layer to be calculated and the result can be useful to analyze the mechanical properties of the coil coating. The calculation was found to be very sensitive to the geometry (especially thickness of the substrate and coating) and properties of the substrate and coating, leading to considerable variability in the calculated coating modulus. The DMA method was successful in detecting the glass transition temperature (Tg) as a peak in the tanδ curve. The value of Tg is sensitive to the preparation conditions (e.g. curing temperature) and composition of the paint. The results show that DMA in Dual Cantilever can be useful as a characterization tool for painted steel.
Yu Zhou, Shan-Tung Tu and Xishan Xie
L. Chen and H. L. Pan, "Mechanical Properties of Coil Coating Evaluated with Dynamic Mechanical Analysis in Daul Cantilever", Key Engineering Materials, Vols. 353-358, pp. 1729-1732, 2007