乙酰丙酮钛螯合物掺杂丙烯酸酯共聚物水溶胶

乙酰丙酮钛螯合物掺杂丙烯酸酯共聚物水溶胶;乙酰丙酮钛螯合物; 丙烯酸酯共聚物水溶胶;掺杂

Acrylate Copolymer Hydrosol Modified by Acetylacetone Chelate of Isopropoxy Titanium

Acetylacetone chelate of isopropoxy titanium was used to modify a ternary carboxy copolymer(MBA) and two tetracopolymers with additional hydroxyl and hydroxylamine groups(MBAH and MBAN). The addition of the chelate increased both the hydrosol viscosity and average particle size, and decreased the hydrosol surface tension; the T_g of the film and the activation energy for the thermal decomposition were (higher), and the water resistance of the film was improved. The chelate brought the biggest change for MBA (hydrosol) in average particle size, which increased from 70 nm to 123 nm, and its surface tension decreaced to 25.20 mN/m, and the decomposition activation energy reached 138.3 kJ/mol. The water resistance of MBAN was improved saliently, with a water up-take of less than 1.5%. Thus it is suitable for use as water-based ink. All the three heated hydrosols with the chelate showed a new absorption peak in UV analysis, indicating that a new product was formed in the heating course. DSC results (also) show that there was an exothermic (reaction) in heating the chelate/MBA blend.