Synthesis of Macromonomers with a Polymerizable Double Bond

Synthesis of Macromonomers with a Polymerizable Double Bond 

The R group may be chemically modified to achieve the double bond. 

Moreover, Schoen et al. [321] employed a new strategy to eliminate the chain-end halogen atom, based on a transfer reaction onto the ligand. They investigated the ATRP of acrylate monomer in the presence of 2-hydroxy- 

The rate of methacrylate functionalization is above 90% for molar masses ranging between 1500 and 24000 gmol x. The efficiency of such functionalization was evidenced by further copolymerization with 2-(dimethylamino)-ethyl methacrylate. 

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Our team also realized the synthesis of macromonomers with a polymerizable double bond by using peculiar transfer agents. For instance, telomeriza-tions of (meth)acrylates were performed in the presence of cysteamine, i.e., thiol with an amine group, leading to PMMAs with an amine at the chain end [253]. However, amines enable the Michael addition onto the double bond activated by the carbonyl group. Hence, before performing the telom-erization, the amine group is protected (chlorhydrate salt) and recovered by a simple basification of the solution (Scheme 48). 

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