Grafting of poly(methyl methacrylate) (PMMA) on microparticulate silica was achieved by initiating the polymerization of MMA by 4,4'-azobis(4-cyanopentanoic acid) that was covalently bound to the silica surface. The initiator seems to be destabilized upon binding it to the silica surface. The kinetics of the graft polymerization are described and are largely affected by the Trommsdorff effect, which makes it possible to graft a high amount of PMMA on silica.

No abstract

Abstract. Photobistable chiral polymers were obtained by covalent attachment of inherently dissymmetric 2-hydroxy-

No abstract

The conformation and orientation of end-grafted (co)polyglutamates and (co)polyaspartates were investigated using several infra-red spectroscopy techniques. The grafted polymers took on the same conformations as the corresponding free polymers; however, the change in conformation at higher temperatures did not take place. The orientation of the polymers grafted onto flat surfaces turned out to be bent towards the surface, but became more perpendicular after interdiffusion of truns-ethyl-0-apo-8'carotenoate.