Syntheses and Properties of Organic-Inorganic Hybrids from Zinconium Chelate and Acrylic Acids

摘要

Acrylic acid modified zirconium chelates were prepared by the reaction of zirconium chelates with acrylic acid. The radical polymerization of the chelates provided polyacryloxybis(ethyl acetoacetato)zirconium ethoxide (PZA) and polymethacryloxybis(ethyl acetoacetato) zirconium ethoxide (PZM). Coating films with a thickness of 0.21-0.22 #mu#m were prepared by a spin coating of benzene/methyl ethyl ketone (v/v = 1/1) solutions of PZA and PZM. The adhesion and hardness of coatiang films were evaluated based on JIS (Japanese Industrial Standard). The results showed that PZA and PZM formed tough coating films with adhesion of 10 points and hardness of 3-4H on a wide range of substrates, compared with poly(methyl methacrylate) and zirconium chelate. After heating the coating films up to 1000 deg C, the adhesion and hardness were 10 points and 9H, respectively, due to the formation of zirconia films with the elimination and combustion of organic moieties.