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- W4313894729 abstract "A waterborne polyurethane dispersion for foamed synthetic leather base was designed and prepared using prepolymer method. There are many variables in the emulsification and chain-extension process of waterborne polyurethane (WPUR) dispersions prepared by prepolymer method. This work thoroughly evaluated the impacts of the steps of adding emulsified water, the temperature of the prepolymer and emulsified water, and concentration of ammonia water on WPUR dispersions by investigating the particle sizes/distributions and the mechanical stability. Changes in the temperature of the prepolymer and emulsified water, the concentration of ammonia water, and the step of adding emulsified water showed great impacts on the appearance and particle size of dispersions. Decreasing the temperature of the prepolymer and emulsified water and increasing the dilution ration of H2O to ethylenediamine (EDA) led to safe emulsification and dispersions with good appearance and narrow particle size distributions can be prepared. Surprising results were obtained by adding emulsified water in two steps, WPUR dispersions with a small particle size, narrow particle distribution and excellent tensile properties can be obtained. The optimized WPUR1 was applied to prepare water-based synthetic leather base after mechanical foaming, and the base presented the desired high performance, such as high folding resistance and peel strength." @default.
- W4313894729 created "2023-01-10" @default.
- W4313894729 creator A5009847938 @default.
- W4313894729 creator A5050511708 @default.
- W4313894729 date "2023-01-07" @default.
- W4313894729 modified "2023-09-30" @default.
- W4313894729 title "Design, Preparation and Properties of Polyurethane Dispersions via Prepolymer Method" @default.
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- W4313894729 doi "https://doi.org/10.3390/molecules28020625" @default.
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