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Synthesis of Amphiphilic and Double-Hydrophilic Block Copolymers Containing Poly(vinyl amine) Segments by RAFT Polymerization of N-Vinylphthalimide

✍ Scribed by Yuya Maki; Hideharu Mori; Takeshi Endo

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
387 KB
Volume
211
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

We report on the controlled synthesis of amphiphilic and double‐hydrophilic block copolymers having poly(vinyl amine) segments by the reversible addition–fragmentation chain transfer (RAFT) polymerization of N‐vinylphthalimide (NVPI), followed by deprotection. The block copolymer poly(NVPI)‐b‐poly(N‐isopropylacrylamide) with a controlled molecular weight and low molecular mass distribution was obtained by the polymerization of N‐isopropylacrylamide (NIPAAm) using dithiocarbamate‐terminated poly(NVPI). The chain extension from the dithiocarbamate‐terminated polystyrene to NVPI could be controlled well under suitable conditions, and provided the block copolymer, polystyrene‐b‐poly(NVPI). We also investigated the thermoresponsive and optoelectronic properties and the aggregation behavior of double hydrophilic and amphiphilic block copolymers obtained after deprotection.

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## Abstract Double‐hydrophilic and amphiphilic block copolymers with characteristic chiroptical properties (L‐L and L‐D types) were synthesized by RAFT polymerization. Five __N__‐acryloylamino acids with different hydrophilicity and chirality were employed, which included A‐(L)Phe‐OMe, A‐(L)Phe‐OH,