chapter  20
42 Pages

Future Trends in Block Copolymers

ByErnest Maréchal

I. GENERAL CONSIDERATIONS The literature relative to block copolymers splits into two very different parts. A majority o f the publications, mainly patents, are relative to mixtures o f block copolymers and homopolymers; they are poorly characterized, with the exception o f elementary analysis, and at the best a limited spectroscopic investigation that does not permit one to distinguish between the block copolymers and the corre­ sponding homopolymers. On the other hand, an increasing number o f articles and reviews describe well-defined products, and often their preparation associates different techniques, for instance, living cationic and mediated radical polymer­ ization.