GRAFT-COPOLYMERIZATION OF DIFFERENT MIXTURES OF ACRYLIC-MONOMERS ON AMYLOPECTIN - SWELLING BEHAVIOR

Hydroxylic and nonhydroxylic acrylates-methyl acrylate (MA), ethyl acr ylate (EA), butyl acrylate (BA), hydroxypropyl methacrylate (HPMA), et hylenglycol dimethacrylate (EGDMA), and mixtures of HPMA-MA, HPMA-EA, HPMA-BA in a 50/50 feed composition-were grafted onto amylopectin with different amounts of crosslinking agent, EGDMA. Percent of total conv ersion, percent crude grafting, and influence of pH in water content w ere studied. In this sense it was only at pH 10 when a real variation in the water content could be seen. It was also proved that the highes t values were obtained when one of the comonomers was EGDMA with a 34 mol % of the initial feed composition. (C) 1994 John Wiley & Sons, Inc .