IODINE TRANSFER COPOLYMERIZATION OF FLUORINATED A-METHYLSTYRENES WITH STYRENE USING 1-IODOPERFLUOROHEXANE AS THE CHAIN TRANSFER AGENT - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2015

IODINE TRANSFER COPOLYMERIZATION OF FLUORINATED A-METHYLSTYRENES WITH STYRENE USING 1-IODOPERFLUOROHEXANE AS THE CHAIN TRANSFER AGENT

Résumé

Fluorinated polymers are niche macromolecules that play an integral role in modern life[1]. Bulk iodine transfer copolymerizations (ITcoPs) of styrene (ST) with either α-fluoromethylstyrene (FMST) or α-trifluoromethylstyrene (TFMST) in the presence of a 1-iodoperfluorohexane as the chain transfer agent (CTA) are presented [2]. The controlled character of these copolymerizations was studied both by supplying a linear evolution of the experimental molar masses (Mns) versus the monomer conversion and evaluating the chain extension ability of the formed copolymers. The amounts of dead chains in all copolymers were lower than 5 %. Bulkier CF3 group induced a slightly lower reactivity of TFMST comonomer since in the first step, the experimental Mns of the copolymers containing TFMST reached 43,000 g.mol-1 while those based on FMST displayed 65,000 g.mol-1. In the second step, the produced diblock copolymers had Mns twice higher than those of the starting copolymers, still containing iodine end-group, as evidenced by a further azidation. Scheme 1. Radical copolymerization of styrene with fluorinated α-methylstyrene in the presence of 1- iodoperfluorohexane initiated by AIBN at 70 °C. References [1]. F. Boschet and B. Ameduri, Chem. Rev., 2014, 114, 927-980. [2]. J. Walkoviak, A. Szwajca F. Boschet, V. Gouverneur, et al., Macromolecules, 2014, 47, 8634–8644
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Dates et versions

hal-01182514 , version 1 (31-07-2015)

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  • HAL Id : hal-01182514 , version 1

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Justyna Walkowiak, Bruno Ameduri, Véronique Gouverneur, Frédéric Boschet. IODINE TRANSFER COPOLYMERIZATION OF FLUORINATED A-METHYLSTYRENES WITH STYRENE USING 1-IODOPERFLUOROHEXANE AS THE CHAIN TRANSFER AGENT. Assises Franco-Polonaises, Jul 2015, Paris, France. ⟨hal-01182514⟩
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