Sacrificial Multiblock Copolymers

The two previous methods to introduce functional end groups rely on secondary metathesis reactions and thermodynamic equilibrium to be reached. Polydis-persity indices of PDl = 2 will be obtained out of mechanistic necessity. This can be a major drawback when it comes to highly defined homo-telechelic polymers. A second drawback is the typically required long reaction times to drive the reactions to thermodynamic equilibrium. 

The principle of sacrificial metathesis polymerization was further applied to cleavable monomers with hidden thiol [52] and carboxyl [136] end groups, offering a larger set of functional groups that can be introduced via this synthesis strategy. 

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