Thermodynamics based simulation approach to accelerated cyclic weathering for ranking of coating protection is developed based on electrochemical impedance spectroscopy (EIS) and thermo-gravimetric measurements. Gloss, adhesion, yellowing, impedance, color change and a plethora of other composite and complex response functions which are the result of several changes. Coating properties are predicted based on more fundamental properties such as water transport and surface roughness. Transport behavior of coatings, including activation energy for diffusion and water volume fractions, properties are characterized with Arrhenius coefficients developed to allow these simulations. These properties are used a-priori prediction of water distribution within the system. An analytical solution is developed to describe the water concentration with position and time for accelerated weathering protocols based on time rescale methods.

Thermodynamics approach to accelerated cyclic weathering ranking of coating's barrier protection

246th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.