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Novel One‐Step Route for Preparing Amphiphilic Block Copolymers of Styrene and N ‐Isopropylacrylamide in a Microemulsion
Author(s) -
Zheng Cheng,
He WeiDong,
Liu WeiJun,
Li Jian,
Li JunFang
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200600183
Subject(s) - copolymer , microemulsion , polymer chemistry , hydrodynamic radius , styrene , micelle , materials science , polymerization , amphiphile , poly(n isopropylacrylamide) , monomer , dynamic light scattering , chemical engineering , chemistry , polymer , nanotechnology , aqueous solution , nanoparticle , composite material , pulmonary surfactant , engineering
Abstract Summary: Copolymerizations of St and NIPAM have been carried out through interfacial‐initiated microemulsion polymerization in a frozen state. FT‐IR and NMR spectroscopies confirm the occurrence of copolymerization between the two monomers. DSC analysis shows the existence of two glass transition temperatures of the resultant copolymers. The micellization of the copolymers is investigated by DLS and the temperature‐responsive behavior of the resultant micelles is observed. DSC and DLS results reveal the block feature of the obtained copolymers. Thus amphiphilic poly(styrene‐ block ‐ N ‐isopropylacrylamide) is prepared by a one‐step interfacial‐initiated microemulsion polymerization.Hydrodynamic radius of the micellar particles formed by (left), and a typical DSC trace of (right), the poly(styrene‐ block ‐ N ‐isopropylacrylamide) prepared here.