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Tuning of Sol–Gel Transition in the Mixed Polymer Micelle Solutions of Copolymer Mixtures Consisting of Enantiomeric Diblock and Triblock Copolymers of Polylactide and Poly(ethylene glycol)
Author(s) -
Hsu YuI.,
Masutani Kazunari,
Yamaoka Tetsuji,
Kimura Yoshiharu
Publication year - 2015
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.201400581
Subject(s) - copolymer , polymer chemistry , micelle , materials science , ethylene glycol , lactide , polymerization , polymer , chemistry , organic chemistry , aqueous solution , composite material
Poly(ethylene glycol) (PEG) is partially furanylated with different feed ratios of furfuryl isocyanate and used as the macro initiator of ring‐opening polymerization of l ‐ and d ‐lactides to synthesize copolymer mixtures of furan‐terminated AB diblock and ABA triblock copolymers (poly(oxyethylene)–poly( l ‐lactide)/poly( l ‐lactide)–poly(oxyethylene)–poly( l ‐lactide) and poly(oxyethylene–poly( d ‐lactide)/poly( d ‐lactide)–poly(oxyethylene)–poly‐( d ‐lactide)) having different diblock/triblock ratios. The mixed micelle solutions of these enantiomeric copolymer mixtures undergo sol‐to‐gel or gel‐to‐sol transition depending on the diblock/triblock ratio of the copolymer mixtures. The rheological properties of the mixed micelle solutions could also be controlled by changing the diblock/triblock ratios or the initial furanylation ratio of PEG.