Synthesis of Block Copolymers by Transition Metal-Catalyzed Polymerization

Synthesis of Block Copolymers by Transition Metal-Catalyzed Polymerization 

Transition metal polymerization catalysts have stimulated tremendous efforts in academic research resulting in numerous industrial applications. Ziegler-Natta and metallocene catalysts have been used for the synthesis of tailor- 

An allyl samarocene catalyst, [(CMe2C5H4)2SmCl(C3H5)MgCl2(THF)4, was employed for the synthesis of trans-PI-b-PCL copolymers and poly(fra s-isoprene-co-hex-l-ene)-fc-PCL terpolymers [111]. The copolymerizations 

The samarocene complexes SmMe(C5Me5)2(THF) and Smn(( 5Mc5)212 were employed as initiators for the synthesis of the well-defined block and triblock copolymers poly(trimethylsilyl methacrylate)-fc-PMMA, PTMSMA-fo-PMMA, PMMA-fo-PTMSMA, PTMSMA-fo-P BuA, PMMA-fo-P BuA, and PMMA-fo-P BuA-fo-PMMA [115]. When the procedure started with MMA polymerization, followed by the addition of TMSMA, block copolymers with low polydispersity and stoichiometric molecular weights in very good agreement with the experimental values were obtained. The reverse mode of add- 

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