Premium
Synthesis and Aqueous Solution Properties of Block Copolyethers with Latent Chemical Functionality
Author(s) -
Stoyanova Boyana,
Novakov Christo,
Tsvetanov Christo B.,
Rangelov Stanislav
Publication year - 2016
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600284
Subject(s) - copolymer , polymer chemistry , ethylene oxide , dynamic light scattering , aqueous solution , propylene oxide , chemistry , polymerization , hydrodynamic radius , ether , oxide , solvent , materials science , polymer , organic chemistry , nanoparticle , nanotechnology
Three series of polyglycidol‐poly(allyl glycidyl ether)‐polyglycidol (PG‐PAGE‐PG) triblock copolymers with ranging PG contents and fixed molar masses of the middle PAGE block are prepared. The copolymers are analogous to the Pluronic , poly(ethylene oxide)‐poly(propylene oxide)‐poly(ethylene oxide) (PEO‐PPO‐PEO), block copolymers in which the chemically inert PEO and PPO are substituted by PG and PAGE, respectively, exhibiting latent chemical functionality. They are prepared by solvent‐free sequential anionic polymerization of allyl glycidyl ether and ethoxyethyl glycidyl ether followed by cleavage of the protective groups. In aqueous solution the block copolymers self‐associate. According to the thermodynamic data, the self‐association is enthalpically favored with a small entropy contribution, which is fundamentally different from that of Pluronic block copolymers. The nanostructures are parameterized by dynamic and static light scattering and visualized by transmission electron microscopy. Data indicate formation of relatively large particles that are identified as compound particles held together by strong hydrogen bonding promoted by the numerous hydroxyl groups from the PG moieties.