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- W2393484114 abstract "Different hard segment waterborne polyurethane prepolymers are synthesized in two steps from isophorone diisocyanate (IPDI)/ toluene diisocyanate (TDI), polyester polyol (N210), dimethlolpropionic acid (DMPA), using deionized water with triethylamine to neutralize and emulsify, then being chained with ethylene diamine (EDA), to obtain WPU adhesives from TDI and IPDI. The structure and properties of different hard segment WPU emulsions and films are investigated by FTIR, Viscosity, Thermo Gravimetric (TG) methods. The NCO contents are analyzed by the quantitative and qualitative analysis methods. It is shown that with the reaction in process, the NCO group content is gradually reduced, and it takes at least 200min to reach the theoretical value. WPU adhesives from TDI and IPDI emulsions are more stable, transparent, and the solvent resistance is better when the contents of DMPA are 3.0%(W/W) and 8.0%(W/W), respectively; Under these conditions, the viscosity can reach 2000mPa·s and 6950mPa·s, respectively. Both WPU films from TDI and IPDI have good thermal stability, and the thermal decomposition temperatures are 350.8℃ and 295.0℃ , respectively. WPU from IPDI has higher mechanical strength, with tensile strength of 3.37MPa. The overall performance of WPU adhesive prepared by IPDI is better than that by TDI." @default.
- W2393484114 created "2016-06-24" @default.
- W2393484114 creator A5081922458 @default.
- W2393484114 date "2010-01-01" @default.
- W2393484114 modified "2023-09-26" @default.
- W2393484114 title "Synthesis and Performance of Waterborne Polyurethanes with Different Hard Segments" @default.
- W2393484114 hasPublicationYear "2010" @default.
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