Abstract
Effect of functional groups in acrylic polymers on alumina suspension and alumina green sheets was investigated. The polymers were butyl methacrylate homopolymer and butyl methacrylate-functional monomer copolymers. The suspension prepared by homopolymer showed shear thinning behavior, indicating the alumina particles were flocculated. However, the copolymer studied in the present work well dispersed 0.6μm alumina particles. The amount of adsorbed polymers containing 0.25mol% function groups increased in the order of -COOH, -NR2, -OH copolymers. The same influential order of functional groups was also recognized in the green sheet's packing degree as well as of the reduction in viscosity at 5s-1, TI value and yield stress of suspension using these polymers as binders.
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