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Synthesis and Properties of Cellulose Acetate Butyrate-Based Waterborne Polyurethane Dispersions
권용록,김해찬,김은진,김정수,장영욱,김동현 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
A cellulose acetate butyrate-based waterborne polyurethane (CAB-WPU) dispersions were synthesized. The prepolymer was prepared using polyester diol, isophorone diisocyanate, and dimethylolpropionic acid. Thereafter, various CAB content and prepolymer were grafted and neutralization and water dispersion steps were performed. The chemical structures of CAB-WPU were characterized by using FTIR. The increase in the CAB content increased the particle size and viscosity of the dispersions. In addition, films were prepared by casting CAB-WPU and the effect of CAB was studied. The incorporation of CAB into the polyurethane backbone has improved mechanical properties and thermal stability and water resistance of films.
Preparation and characteristics of polyurethane dispersion: effect of ionic monomer content
권용록,김진명,김은진,김정수,장영욱,김동현 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Polyurethane dispersion (PUD) is used in a variety of applications as a flexible coating for textiles and a hard coating for wood and metal surfaces. The dispersion stability of PUD particles is secured mainly by introducing a monomer having a polar ionic group into the polymer chain. We synthesized PUD and analyzed its characteristic to determine the minimum content of ionic monomers for PUD to have dispersion stability. The content of dimethylolpropionic acid (DMPA) for the synthesis of PUD was 2-5 wt%. The structure and reactivity of PUD were confirmed through FT-IR analysis and dibutylamine reverse titration, respectively. PUD were stored in a closed container to investigate dispersion stability at room temperature. The particle size and distribution of PUD were analyzed using a particle size analyzer. The viscosity of PUD was measured using brookfield viscometer.