Premium
Synthesis of Alternating Polystyrene/Poly(ethyleneoxide) Branched Polymacromonomers
Author(s) -
Deimede Valadoula,
Kallitsis Joannis K.
Publication year - 2002
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20020118)8:2<467::aid-chem467>3.0.co;2-1
Subject(s) - polymer chemistry , atom transfer radical polymerization , gel permeation chromatography , polystyrene , condensation polymer , chemistry , end group , polymerization , organic chemistry , polymer
Newly designed PS/PEO alternating branched polymacromonomers have been obtained by polycondensation of α ‐dicarboxy‐functionalized polystyrene and α ‐dihydroxy‐functionalized polyethyleneoxide. 4‐[3,5‐Bis(methoxycarbonyl)phenoxymethyl]benzyl bromide was used as atom‐transfer radical polymerization (ATRP) initiator for the synthesis of α ‐dicarboxy functionalized polystyrenes. These macromonomers possess low polydispersities and molecular weights in the range of 7000 to 100 000, as proved by gel permeation chromatography (GPC) and 1 H NMR. α ‐Dihydroxy functionalized polyethyleneoxide (PEO) was synthesized by treatment of monofunctionalized PEO with 3,5‐bis(benzyloxy)benzoyl chloride. Polycondensation of the α ‐dicarboxy PS with the α ‐dihydroxy PEO in solution or in bulk resulted in alternating PS/PEO polymacromonomers, which were effectively purified from the unreacted macromonomers and characterized by using 1 H NMR, GPC, thermal analysis, and optical microscopy. Light‐scattering measurements in organic solvents like THF or dioxane have shown that these polymacromonomers form stable micelles.