CONFORMATION AND ORIENTATION OF END-GRAFTED (CO)POLYGLUTAMATES AND (CO)POLYASPARTATES

The conformation and orientation of end-grafted (co)polyglutamates and (co)polyaspartates were investigated using several infra-red spectros copy techniques. The grafted polymers took on the same conformations a s the corresponding free polymers; however, the change in conformation at higher temperatures did not take place. The orientation of the pol ymers grafted onto flat surfaces turned out to be bent towards the sur face, but became more perpendicular after interdiffusion of trans-ethy l-beta-apo-8'-carotenoate.