Metathetic degradation of trans-1,4-polyisoprene with ruthenium catalysts
| dc.rights.license | open | |
| hal.structure.identifier | Laboratoire de Chimie des Polymères Organiques [LCPO] | |
| dc.contributor.author | OUARDAD, Samira | |
| hal.structure.identifier | Laboratoire de Chimie des Polymères Organiques [LCPO] | |
| hal.structure.identifier | Team 1 LCPO : Polymerization Catalyses & Engineering | |
| dc.contributor.author | PERUCH, Frédéric
IDREF: 152900748 | |
| dc.date.accessioned | 2020 | |
| dc.date.available | 2020 | |
| dc.date.issued | 2014 | |
| dc.identifier.issn | 0141-3910 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/20233 | |
| dc.description.abstractEn | Degradation study of trans-1,4-polyisoprene (trans-1,4-PI), that can be produced by the nature, was performed using first and second generation Grubbs and Hoveyda Grubbs catalysts with olefins (ethylene or 1-octene) as transfer agents in toluene at 60 C. While first generation Grubbs catalyst afforded low degradation, highlighting the presence of catalyst decomposition and/or inter-chain cross-metathesis reactions, an almost complete metathetic degradation could be reached using the second generation Grubbs catalyst in few minutes. Nevertheless, the synthesis of well-defined polyisoprenes with a targeted molar mass revealed to be difficult with Grubbs catalysts. On the contrary, Hoveyda Grubbs catalysts were found to be more efficient to control the degradation of trans-1,4-PI. Indeed, regioselective degradation afforded pure trans-1,4-PI with a range of molar mass from 50 000 g/mol to 10 000 g/mol. However, polyisoprenes of lower molar masses (M-n < 10 000 g/mol) contained some cis units, highlighting the presence of isomerization reactions, which could be due to the catalyst decomposition into hydride specie and/or pi-allyl metal hydride | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Octene | |
| dc.subject.en | Metathetic degradation | |
| dc.subject.en | Trans-1 | |
| dc.subject.en | 4-polyisoprene | |
| dc.subject.en | Ruthenium catalysts | |
| dc.subject.en | Ethylene | |
| dc.title.en | Metathetic degradation of trans-1,4-polyisoprene with ruthenium catalysts | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.polymdegradstab.2013.10.022 | |
| dc.subject.hal | Chimie/Polymères | |
| bordeaux.journal | Polymer Degradation and Stability | |
| bordeaux.page | 249-253 | |
| bordeaux.volume | 99 | |
| bordeaux.hal.laboratories | Laboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629 | * |
| bordeaux.institution | Bordeaux INP | |
| bordeaux.institution | Université de Bordeaux | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01368856 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01368856v1 | |
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