Preparation Of Functional Polymers Via Combination Of LFRP And "Click Chemistry" Techniques

Functional polymers have been paid much attention due to their special preperties redulted from special functional groups."Living"/controlled free radical polymerization (LFRP) is one of powerful tools for synthesis of functional polymers. Up to now, there are several LFRP method developed, such as Stable Free Radical Polymerization (SFRP), Atom Transfer Radical Polymerization (ATRP), Reversible Addition-Fragmentation Chain Transfer (RAFT) and Single Electron Transfer mediated Living Radical Polymerization (SET-LRP)."Click Chemistry" also has been widely employed in synthetic polymer chemistry area. The technique via combination of LFRP and "Click Chemistry" has become one of hot issues in the area of synthetic polymer chemistry.This thesis are focused on the preparation of functional polymers via combination of LFRP and "Click Chemistry" techniques. The contents include the following two issues:(1) The SET-RAFT polymerization of azide vinyl monomer,1-azido-undecanoyl methacrylate (AzUMA), was successfully carried out at ambient temperature. The polymerization shows the nature of living behaviour:the first kinetic plots, the linear increase of molecular weight of the obtained polymer with the monomer conversion and the relative low molecular weight distribution (Mw/Mn≤1.22). The complete retention of azido group of the resulting polymer was confirmed by1H NMR and FTIR analysis. Retention of chain functionality was confirmed by chain extension with methyl methacrylate (MMA) to yield a diblock copolymer. Furthermore, the side-chain functional polymers could be prepared by one-pot/one-step technique, which is combination of SET-RAFT and "click chemistry" methods.(2) The functional AB3type compound with one azide groupand three alkynyl groups was designed and synthesized. The hyperbranched polymers were prepared by one-step "click chemistry", and the branched chains present a high density of terminal alkynyl groups for further functionalization.