Enzymatic synthesis and evaluation of surface-active properties of esters of dibasic acids and polyethylene glycols

摘要

Polyesters have been made in yields of 40-64% by reaction of a dibasic acid (sebacic or adipic) with a polyethylene glycol (PEG 400 or 600) using Mucor miehei lipase as catalyst at 70-75 deg C for 7 hours at 2 mm of Hg pressure.The products have been examined for several interfacial properties including interfacial tension,surface excess concentration,minimum surface area per mole,and thermodynamic behaviour of micelle formation.