This study treats the transport of solvents in a thermoplastic polyolefin (TPO) and influence on mechanical bulk properties. The selected substrate and solvents represent materials used in coatings on plastics. The swelling of TPO was found to depend on the temperature and, in accordance with Hansen’s concept of solubility, revealing the following order of swelling power for solvent types: aromatic hydrocarbons ≫ esters > alcohols. Absorption of TPO by the solvent xylene at 20 and 80°C allowed for the calculation of a diffusion coefficient. Complete release of xylene was found to last several months. Recovered TPO samples were of slightly lower weight, reduced E-modulus and tensile strength compared to the original state.
Journal of Coatings Technology and Research – Springer Journals
Published: Jan 23, 2018
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