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Synthesis and Characterization of Poly(urethane-ethyl acrylate) Hybrid Emulsion  

Cheong, In Woo (Yonsei Center for Nanotechnology, School of Chemical Engineering and Biotechnology, Yonsei University)
Lee, Jong Kil (Yonsei Center for Nanotechnology, School of Chemical Engineering and Biotechnology, Yonsei University)
Kim, Jung Hyun (Yonsei Center for Nanotechnology, School of Chemical Engineering and Biotechnology, Yonsei University)
Publication Information
Applied Chemistry for Engineering / v.16, no.1, 2005 , pp. 86-92 More about this Journal
Abstract
Poly(urethaneethyl acrylate) hybrid emulsions were synthesized to improve their thermomechanical and solvent resistance properties. In the synthesis, dimethylol propionic acid was used to impart hydrophilicity to the hybrid polymers, and ethyl acrylate monomer was added to the polyurethane prepolymer after neutralization with triethylamine. After dispersion of the neutralized prepolymer, chain extension was carried out with ethylene diamine. Consequently, poly(urethaneethyl acrylate) hybrid emulsion was prepared via soap free emulsion polymerization of ethyl acrylate with reduction-oxidation initiator couple of t-butyl hydroperoxide/sodium bisulfite at $50^{\circ}C$. Tehsile strength, 100% modulus, elongation, and solvent-resistance properties of the hybrid emulsion were measured and compared with those of polyurethane homopolymer, poly(ethyl acrylate) homopolymer, and simple blended samples.
Keywords
polyurethane; waterdispersible; poly(ethyl acrylate); hybrid; emulsion; soap-free; polymerization; grafting; emulsification; neutralization;
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