CONFORMATION OF AMPHIPHILIC BRANCH CHAIN IN COPOLYMER SURFACTANTS ON INTERFACE

The conformation of amphiphilic branch chain in a new type of copolyme r surfactants on interface was studied. The results of laser light sca ttering demonstrated that the branch chain can only lie on the air/wat er interface. By means of XPS measurement with variable angles, the mo lecular conformations in different thickness of the copolymer layer we re obtained. Depending on the chemical nature of the copolymer surfact ants, the oxyethylene segments of the branch chains will have loop-tra in, train, or loop molecule conformations on the surface. (C) 1997 Joh n Wiley & Sons, Inc.