<scp>UV</scp>–<scp>V</scp>is–<scp>NIR</scp>and<scp>EPR</scp>Spectroscopies

Sojka, Zbigniew; Bozon‐Verduraz, François; Che, Michel

doi:10.1002/9783527610044.hetcat0053

Cited by 7 publications

(1 citation statement)

References 170 publications

(161 reference statements)

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“…As shown in the top left insert figure, the peaks of 214, 318 and 368 nm can be assigned to the maximum absorption of acylamino groups, the R bond of ketone groups and the ether bonds in PU, respectively. Peaks at 203 and 230 nm should be ascribed to the maximum absorption E2 bond and the triethylene conjugated structure of benzene rings in EP [39][40][41]. Besides, the absorption band between 470 and 560 nm may be attributed to the conjugated structures between tertiary amine and the benzene rings, which explain the tawny color of cured EP.…”

Section: Uv-vis Absorptionmentioning

confidence: 99%

Composition Distribution, Damping and Thermal Properties of the Thickness-Continuous Gradient Epoxy/Polyurethane Interpenetrating Polymer Networks

Zhang

Shi

et al. 2017

Applied Sciences

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A thickness gradient interpenetrating polymer network (IPN) was easily created that takes advantage of the relatively poor compatibility and curing rates discrepancy between epoxy (EP) and polyurethane (PU). Ultraviolet absorption spectrum (UV-Vis), thermogravimetric (TG), Differential scanning calorimetry (DSC), Dynamic thermomechanical analysis (DMA), Atomic force microscope (AFM) and water contact angle were adopted to characterize this IPN structure. We found that the absorption in visible light region, glass-transition temperatures (T g ), thermal decomposition temperatures (T d ) and Derjaguin-Muller-Toporov (DMT) modulus were increasing along with the gradient direction from bottom side to top side of the IPN. While the absorption in ultraviolet region and adhesion force were decreasing along with the gradient direction from bottom side to top side of the IPN. DMA analysis demonstrates that this continuous gradient IPN has a good balance between the damping temperature range and the loss factor which is suitable for using as a self-supporting damping structure.

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Section: Uv-vis Absorptionmentioning

confidence: 99%