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- W2990256838 abstract "Waterborne polyurethanes (WPUs) are interesting materials for coatings when compared to solvent-based polyurethanes, once that reducing the concentration of volatile organic compounds that are harmful for human health and the environment. However, the WPU has low weathering resistance. In order to improve this behavior among others properties, inorganic fillers has been added in these systems. SiO2 particles from various sources, mainly, from agro-industrial waste, as rice husk has attracted the scientific and technological interest. In this study, the accelerated weathering essay was performed in waterborne polyurethane (WPU)/ silica (from rice husk ash) composites in order to evaluate the thermal and physical changes in these materials. These composites were prepared by two distinct methods: in situ polymerization and blending method. The highest resistance to thermal degradation and to accelerated weathering was reached with WPU/silica composites obtained by blending method due the interactions between SiO2 particles and the polymer matrices. Blending method for preparation WPU/silica composites proved to be a simpler and faster method, with no drawback for large scale application." @default.
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- W2990256838 date "2019-01-01" @default.
- W2990256838 modified "2023-10-17" @default.
- W2990256838 title "Weathering Resistance of Waterborne Polyurethane Coatings Reinforced with Silica from Rice Husk Ash" @default.
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- W2990256838 doi "https://doi.org/10.1590/0001-3765201920181190" @default.
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