Reliability modeling to predict in‐service weatherability of polyurethane nanocomposite coatings: Approach, comparison and validation

Abstract

AbstractThis article addresses the challenge of comparing in‐service weatherability among newly developed coatings. The study aims to compare the durability of three thermoplastic polyurethane‐based coatings specifically formulated for defense inflatables. It introduces a reliability model that incorporates two weathering stresses, namely, ultra‐violet radiation and temperature, to predict the service life of the coatings. A life–stress relationship has been established from the accelerated aging tests, which facilitates the determination of material service life at use level conditions. Notably, the analysis underscores the significant improvement in service lifetime achieved with nanocomposite‐based coatings. The validity of the proposed model is established through comparison with real‐world field test data, emphasizing the effectiveness of the approach in assessing and comparing the performance of the three coated samples. The insights gained from this research will surely contribute to enhancing the durability assessment of coated systems in real‐world conditions for various fields of applications.Highlights Introduces a unique method to compare weatherability of three polyurethane coatings. Reliability model predicts service life under UV and temperature stresses. Life–stress relationship via accelerated aging for accurate service life. Nanocomposite coatings show longer service life than conventional ones. Model validated with field data, confirming practical applicability.