| 초록 |
Aqueous polyurethane (PU)/polyacrylic esters hybrid latex partices were successfully prepared through miniemulsion polymerization process of PU solutions in acrylic monomers. This process provided a method to synthesize nanosized hybrid latex particles by combination of polyaddition and radical polymerization in an one-pot procedure. The PU was formed from isophorone diisocyanate and polypropylene glycol (Mn = 2000). The weight ratio between PU and butyl acrylate components varied to obtain different hybrid latexes, and the minieulsions were polymerized using potassium sulfate as initiator. Likewise, monomers of methyl methacrylate and butyl acrylate were used in various ratios. The influences of several factors, such as ratio of components (PU and acrylic latexes), temperature and initiator, on the molecular weight and particle size, have been studied. The thermomechanical properties and water resistance were also studied with PU/polyacrylic esters hybrid films. |
