Synthesis of PMMA-b-PEG-b- PMMA by controlled Polymerization Using Macro-RAFT Agents

Öz

In this work controlled radical polymerization (CRP) of methyl methacrylate was carried out in the

presence of the Poly(ethylene glycol)(PEG) xanthate reversible addition fragmentation (RAFT) chain transfer

agent designated as (CTA1) and (CTA2). Firstly, PEGs having different molecular weights (400 and 600 g/mol)

were reacted KOH and CS2 and the terminated 4-chloro benzoyl chloride to obtain PEG-xathates. RAFT agent

possessing PEG chain was used in the RAFT polymerization of MMA to yield PMMA-b-PEG-b-PMMA tri-block

copolymers which can be used in various potential applications. With the gravimetric follow of the reaction, the

control mechanism works well and the molecular weight has grown linearly. The structures of the synthesized

macro RAFT agents and polymers were characterized by 1H-NMR, 13C-NMR and FT-IR spectroscopic methods.

Anahtar Kelimeler

• Block Copolymer,Controlled Radical Polymerization,Polyethylene Glycol,RAFT

Kaynakça

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