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Block Copolymer PEO‐ b ‐PHPMA Synthesis Using Controlled Radical Polymerization on a Chip
Author(s) -
Wu Tao,
Mei Ying,
Xu Chang,
Byrd H. C. Michelle,
Beers Kathryn L.
Publication year - 2005
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.200500214
Subject(s) - monomer , copolymer , polymerization , ethylene oxide , polymer chemistry , materials science , radical polymerization , methacrylate , bulk polymerization , polymer , composite material
Abstract Summary: Block copolymers of poly(ethylene oxide‐ block ‐2‐hydroxypropyl methacrylate) (PEO‐ b ‐PHPMA) with a range of molecular masses of the PHPMA block were obtained by controlled radical polymerization on a chip (CRP chip) using a PEO macroinitiator. A series of well‐controlled polymerizations were carried out at different pumping rates or reaction times with a constant ratio of monomer to initiator. The stoichiometry of the reactants was also adjusted by varying relative flow rates to change the reactant concentrations.A schematic of a CRP chip and SEC traces of the PEO‐ b ‐PHPMA produced from different pump rates with a 1:100 ratio of initiator to monomer. The dashed peaks are the macroinitiator, PEO‐Br (left), and monomer, HPMA (right).