Abstract
AbstractThermo‐responsive highly branched polyethers were prepared via one‐step proton‐transfer polymerization of 1,2,7,8‐diepoxyoctane (DEO) and multiols including ethylene glycol, di(ethylene glycol), tri(ethylene glycol), 1,2‐propanediol, and glycerol. The degree of branching of the products obtained from DEO and oligo(ethylene glycol) is estimated to be 0.16–0.22. All highly branched polyethers exhibit a thermally induced phase transition in aqueous solution. The LCSTs of these polyethers can be tuned in the range of 23.6–67.2 °C. It is found that the hydrophilic/hydrophobic balance of the DEO and diols, the feed ratio of DEO to glycerol, and the molecular weights play important role in controlling the LCST.magnified image
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