BERTO, Pierre; GRELIER, Stéphane; PERUCH, Frédéric

doi:10.1016/j.polymdegradstab.2018.06.019

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BERTO, Pierre
Team 1 LCPO : Polymerization Catalyses & Engineering
Team 2 LCPO : Biopolymers & Bio-sourced Polymers

GRELIER, Stéphane
Team 2 LCPO : Biopolymers & Bio-sourced Polymers

PERUCH, Frédéric

Team 1 LCPO : Polymerization Catalyses & Engineering

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Polymer Degradation and Stability. 2018, vol. 154, p. 295 - 303

Elsevier

Résumé en anglais

Low molar mass carbonyl telechelic cis,1-4 polyisoprene (CTPI) and aldehyde telechelic cis,1-4 polybutadiene (ATPB) were easily prepared by the controlled degradation of high molar mass 1,4-cis polyisoprene (PI) and 1,4-cis polybutadiene (PB) in a molar mass range of 5 000-80 000 g.mol-1. Two methods are compared: the direct one using only the periodic acid (H5IO6) to randomly cleave the chain and a second one where the chain are first epoxidized before being cleaved by the periodic acid. In both cases, a control of the final chain length was observed with nevertheless a better control of the final chain length, dispersity and chain-ends using the 2-steps procedure. Importance of the washing step in order to avoid side reactions on the carbonyl chain-ends is also discussed. 2< Réduire

Mots clés en anglais

Polybutadiene

Polyisoprene

controlled degradation

epoxidation

periodic acid

mCPBA

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Controlled degradation of polyisoprene and polybutadiene: A comparative study of two methods

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