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비닐단량체를 함유한 새로운 실리콘의 합성과 수성 Polyurethane-Veova/Vinyl Acetate 하이브리드 에멀젼 공중합체 내에서 사용
Hamid Javaherian Naghash,Elham Kasaeian Naeni 한국고분자학회 2011 폴리머 Vol.35 No.5
A novel silicone (Si) containing vinylic monomer, N-(3-(triethoxysilyl)propyl) methacrylamide (TESPMA), based on 3-aminopropyltriethoxysilane (APTES) and methacryloyl chloride (MCl) has been synthesized for formulation of waterborne polyurethane (WPU). Two types of vinyl group containing Si, methacryloxypropyltriethoxysilane (MPTES) and triethoxyvinylsilane (TEVS), have been used as coupling reagents for comparison of the effects of Si kinds with TESPMA on the WPU. A series of new siliconized WPU, vinyl acetate/vinyl ester of versatic acid (VAc-Veova), TESPMA, MPTES and TEVS hybrid latexes have been successfully prepared by emulsion polymerization in the presence of WPU dispersion.
Hamid Javaherian Naghash,Rouhollah Akhtarian,Mohammad Iravani 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.7
Functional polyurethane surfactants (tri-block) were synthesized by addition polymerization of hexamethylenediisocyanate (HMDI), isophorone diisocyanate (IPDI) and 2, 4-toluene diisocyanate (TDI) with poly (propyleneoxide) (PPO) and monoallyl-end-capped poly (ethylene oxide) (PEO). The chemical structure of the polyurethane surfactants(PUS) was confirmed by Fourier transform infrared, 1H NMR and 13C NMR spectroscopy. Then, a series of polyvinylacetate (PVAc) latexes were successfully synthesized by the emulsion copolymerization in the presence of differentPUS. The particle size, amount of coagulum and surface tension were evaluated. These polymeric surfactants werefound to have excellent surface activity. The lowest surface tension of polyurethane surfactant aqueous solutions couldbe reduced to 41.5 dyn/cm for IPDI. All the polyurethane surfactants synthesized had low critical micelle concentrationsand could reduce the surface tension even at very low concentration levels (10−3-10−2 molL−1).