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In: Chemistry
Propose a method for the synthesis of a block copolymer of Polystyrene-b-poly (methyl methacrylate) (PS-b-PMMA) by...
Propose a method for the synthesis of a block copolymer of Polystyrene-b-poly (methyl methacrylate) (PS-b-PMMA) by living anionic polymerization (LAP), followed by ATRP (transformation of LAP to ATRP). Write down the reaction scheme.
Solutions
Expert Solution
The first step of the synthesis would be to form the anionic propagating species in a process of living anionic polymerization (LAP) starting with styrene and n-Butyllithium as the initiator in a cyclohexane solvent.
Then, ethylene oxide in cyclohexane is added to generate a new anionic propagating species.
The propagating species is subsequently acylated with trichloroacetyl chloride in cyclohexane to generate a deactivated acylated species.
The deactivated acetylated species generated above acts as the macroinitiator in an Atom transfer radical polymerization (ATRP) process. Here, CuCl/bpy acts as the transition metal catalyst system and the monomer is Methyl methacrylate (MMA). The solvent used is toluene.
queen_honey_blossom answered 2 years agoRelated Solutions
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