Recovery dynamics of acrylic coating surfaces

Scientists have monitored the recovery dynamics of acrylic coating surfaces under elevated relative humidity (RH) by atomic force microscopy.

A monitor in a laboratory as a symbol.

It was found that the extent and rate of recovery are closely related to the glass transition temperature (Tg) of the polymer and RH. The phenomenon is explained by viscoelastic mechanics theory, in which mechanical characteristics such as elastic modulus and viscosity of the polymer have influence over the dynamics as well as the extent of recovery.

New insights

The experimental data suggests that the polymer undergoes change in viscoelasticity at elevated RH due to water uptake. It is believed that this behavior may provide new insights in research areas such as controlled repair of coatings. According to the researchers, this experimental approach will help to better understand the mechanical performance of coatings under deviated environmental conditions.

The study has been published in Progress in Organic Coatings, Vol. 146, September 2020.

Image source: Pixabay.

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