Erratum to: The Effect of Improved Crosslink Density on the Properties of Waterborne Polyurethanes Using Sol-Gel Process
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Water-based systems are dominating the coating market because of worldwide VOCs regulations. Research is focusing especially on waterborne polyurethane (WPU) because of its unique mechanicaland chemical properties. However, commercial WPU consists of linear thermoplastic polymers withpolar groups on the main chain, which do not perform as well as solvent-borne PU in a two-packsystem. In this study, APTES were used as a chain crosslink agent to overcome commercial WPU’slimited performance. WPUs synthesized by using a sol-gel process were evaluated with FT-IR, particleanalysis, TGA, tensile tests, pull-off tests, SEM, and EIS. The results showed that WPUs with addedAPTES had better thermal stability, mechanical properties, and water resistance than did WPUs withoutadded APTES. Consequently, the sol-gel process increased the crosslink density of WPUs and modifiedthe WPU’s own properties.
Abstract
Water-based systems are dominating the coating market because of worldwide VOCs regulations. Research is focusing especially on waterborne polyurethane (WPU) because of its unique mechanicaland chemical properties. However, commercial WPU consists of linear thermoplastic polymers withpolar groups on the main chain, which do not perform as well as solvent-borne PU in a two-packsystem. In this study, APTES were used as a chain crosslink agent to overcome commercial WPU’slimited performance. WPUs synthesized by using a sol-gel process were evaluated with FT-IR, particleanalysis, TGA, tensile tests, pull-off tests, SEM, and EIS. The results showed that WPUs with addedAPTES had better thermal stability, mechanical properties, and water resistance than did WPUs withoutadded APTES. Consequently, the sol-gel process increased the crosslink density of WPUs and modifiedthe WPU’s own properties.