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6605036 
Journal Article 
Preparation of an amphiphilic diblock copolymer composed of polystyrene and hydrophilic alternating copolymer blocks 
Ohshio, M; Mizoue, Y; Shiino, D; Matsui, T; Oda, K; Yusa, SI; , 
2020 
1 
Polymer Journal
ISSN: 0032-3896 
NATURE PUBLISHING GROUP 
NEW YORK 
189-197 
WOS:000509658800002 
Generally, conventional free-radical polymerization of an allyl monomer affords low-molecular-weight oligomers. However, since the allyl monomer can form a charge transfer complex with maleic anhydride (MA), in which the former acts as an electron donor and the latter acts as an acceptor, relatively high-molecular-weight alternating copolymers can be obtained via copolymerization of an allyl monomer and MA. In this study, hydrophilic alternating copolymers (P(11EO/MA)(m)) of methoxy poly(ethylene glycol) allyl ether (11EO) and MA were prepared via reversible addition-fragmentation chain transfer (RAFT)-controlled radical polymerization. The alternating nature of the polymers was confirmed by the consumption of both monomers during polymerization. The MA units in P(11EO/MA)(m) were hydrolyzed to prepare pendant carboxylic acid group-containing polymers (P(11EO/MH)(m)). Furthermore, an amphiphilic diblock copolymer (P(11EO/MH)(m)-PSn) was prepared via RAFT copolymerization of styrene monomer using P(11EO/MH)(m) as a macro-chain transfer agent. The association behavior of P(11EO/MH)(m)-PSn in water was also investigated.