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Ring Opening Metathesis Polymerization(ROMP) ofcis- andtrans-3,4-Bis(acetyloxymethyl)cyclobut-1-enes and Synthesis of Block Copolymers
Abstract : The synthesis and living ring opening metathesis polymerization (ROMP) of diacetate functionalized cyclobutene derivatives cis-3,4-bis(acetyloxymethyl)cyclobutene (2) and trans-3,4-bis(acetyloxymethyl)cyclobutene (3) were investigated with the functional group tolerant initiators (PCy3)2(Cl)2RuCHPh (I) and (SIMes)(PCy3)(Cl)2RuCHPh (II) (SIMes: 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene). The kinetic parameters of the ROMP initiated by the ruthenium alkylidene complexes I and II were determined and correlated to monomer stereochemistry. The cis isomer 2 was found to be more reactive than the trans isomer 3 and to generate functional polymers of narrow molecular weight distribution especially with the classical “first generation Grubbs catalyst” I. Block copolymers containing 2 and cyclooctadiene (COD) or norbornene (NBE) were synthesized. Block copolymer poly(2-b-COD) was hydrolyzed and converted to a material with a block bearing hydrophilic alcohol functional groups and hydrophobic block.
https://hal-univ-lemans.archives-ouvertes.fr/hal-02355082
Contributeur : Laurent Fontaine Connectez-vous pour contacter le contributeur
Soumis le : vendredi 8 novembre 2019 - 09:42:50
Dernière modification le : mercredi 15 décembre 2021 - 11:18:08
Contributeur : Laurent Fontaine Connectez-vous pour contacter le contributeur
Soumis le : vendredi 8 novembre 2019 - 09:42:50
Dernière modification le : mercredi 15 décembre 2021 - 11:18:08
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