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Synthesis of triblock copolymers made of a fluorinated central block and two outside poly(1,3‐dioxolane) blocks
Author(s) -
Djebar Abdelkader,
Reibel Léonard,
Franta Emile
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961070121
Subject(s) - dioxolane , molar mass , copolymer , molar ratio , polymer chemistry , solvent , amphiphile , mass fraction , block (permutation group theory) , materials science , diol , fraction (chemistry) , chemistry , organic chemistry , catalysis , polymer , mathematics , geometry
Conditions are given that allow the preparation of highly amphiphilic triblock copolymers where the central block is a perfluoropolyether (number average molar mass equal to 2000) only soluble in freon‐type solvents, and the outside blocks are made of water soluble poly(1,3‐dioxolane) whose molar mass can be controled by the amount of 1,3‐dioxolane consumed. Two methods are described: it is possible either to use CH 2 Cl 2 as a solvent (but only one of the two phases yields the expected product) or to recourse to a Fomblin‐rich fraction prepared previously as the initial diol (but the product of the reaction can be heterogeneous and separation has to be performed).