Systemic polymeric libraries initiator systems

The SCVP approach to HPs was first reported by Frechet and co-workers through polymerization of an AB -type monomer. Normally, the AB contains a vinyl group and a functional group that can initiate the polymerization of the vinyl moiety. Hence, the AB is also named as an inimer (inimer = initiator + monomer).Up to date, SCVP has been extended to cationic, anionic and radical polymerization systems, preparing various libraries of HPs and HP-modified solid surfaces. If the AB ... 

Before the preparation of systematical (co)polymer libraries to understand the effect of molecular structure on the thermoresponsive properties, the RAFT polymerization conditions were optimized using 2-cyano-2-butyl dithiobenzoate (CBDB) as RAFT agent and azobisi-sobutyronitrile (AIBN) as radical initiator. The RAFT polymerization mechanism and the structures of CBDB and AIBN are depicted in Figure 22.9. The control over the RAFT free-radical polymerization process strongly depends on the ratio of radical initiator to RAFT agent and temperature. Both these parameters control the number of radicals that are generated and, thus, influence the main propagation equilibrium, that is, the number of dormant and active chains in the system that controls the extent of termination reactions. 

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