Publication: Effect of different chain extender on the properties of self-healing polyurethane
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Date
2024-08-01
Authors
Putri Hani Syafiqah Binti Ismail @ Ismil
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Abstract
Self-healing polyurethane is a type of polymer that can repair damage such as scratches. It can restore its original properties without external intervention and can enhances the durability and lifespan of materials. This research is to investigate the development and characterization of self-healing polyurethane. By optimize the synthesis process to achieve good mechanical properties. Various concentrations (in mmol) of hexamethylene diisocyanate (HDI) and methylene dicyclohexyl diisocyanate (HMDI) were used to study their effects on the mechanical properties and self-healing efficiency of polyurethane. Then, the polyurethane was characterized and tested to evaluate their properties by using tensile test, self-healing efficiency, optical microscope, FTIR and WCA. The self-healing polyurethane demonstrated improved mechanical properties compared to conventional polyurethane coatings. The PU were able to autonomously repair micro-cracks and minor damages, thereby extending their lifespan and maintaining performance over time. The study revealed that PU-HMDI samples exhibited higher tensile strength, better self-healing efficiency, and greater hydrophobicity compared to PU-HDI samples, with optimal performance observed at 1.25 mmol HMDI content. The optimized PU exhibit good tensile strength and making them suitable for various industrial applications, including automotive, aerospace, and construction.