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Lanthanide metal-organic frameworks as ziegler–natta catalysts for the selective polymerization of isoprene

Lanthanide metal-organic frameworks as ziegler–natta catalysts for the selective polymerization of isoprene
Lanthanide metal-organic frameworks as ziegler–natta catalysts for the selective polymerization of isoprene
The unprecedented ability of neodymium-based metal organic frameworks (MOFs) as
polymerisation pre-catalysts towards isoprene is reported. Combined with methylaluminoxane
(MAO) or modified MAO (MMAO), they afford mainly cis-selective polyisoprene, up to
90.7%. Both the activity and the selectivity are tentatively ascribed to the intrinsic microstructure
of the starting materials. Compared to conventional carboxylates, MOFs associated
to an Al co-catalyst are less active but the selectivity is found to be higher, and it
may be modified by controlling the access to the pores, which would be favored at higher
temperatures. Some residual crystalline
MOF remains disseminated within the
polymer matrix, as shown by X-ray
diffraction and X-ray absorption spectroscopy
studies.
lanthanides, matrix, metal-organic frameworks, polyisoprene, ziegler-natta polymerization
1022-1352
1923-1932
Vitorino, Marta J.
fe90c6a8-8f62-4a9e-ba25-06fca7585aef
Devic, Thomas
a4f418e0-e97a-4878-858c-5c661ac62948
Tromp, Moniek
48c1ebbb-579c-42b6-83bb-7188c668b322
Férey, Gérard
93e4bf79-7606-4ff3-b39f-fa5d744a7e48
Visseaux, Marc
e605968f-27b8-4378-8992-4cb6d5bf8110
Vitorino, Marta J.
fe90c6a8-8f62-4a9e-ba25-06fca7585aef
Devic, Thomas
a4f418e0-e97a-4878-858c-5c661ac62948
Tromp, Moniek
48c1ebbb-579c-42b6-83bb-7188c668b322
Férey, Gérard
93e4bf79-7606-4ff3-b39f-fa5d744a7e48
Visseaux, Marc
e605968f-27b8-4378-8992-4cb6d5bf8110

Vitorino, Marta J., Devic, Thomas, Tromp, Moniek, Férey, Gérard and Visseaux, Marc (2009) Lanthanide metal-organic frameworks as ziegler–natta catalysts for the selective polymerization of isoprene. Macromolecular Chemistry and Physics, 210, 1923-1932. (doi:10.1002/macp.200900354).

Record type: Article

Abstract

The unprecedented ability of neodymium-based metal organic frameworks (MOFs) as
polymerisation pre-catalysts towards isoprene is reported. Combined with methylaluminoxane
(MAO) or modified MAO (MMAO), they afford mainly cis-selective polyisoprene, up to
90.7%. Both the activity and the selectivity are tentatively ascribed to the intrinsic microstructure
of the starting materials. Compared to conventional carboxylates, MOFs associated
to an Al co-catalyst are less active but the selectivity is found to be higher, and it
may be modified by controlling the access to the pores, which would be favored at higher
temperatures. Some residual crystalline
MOF remains disseminated within the
polymer matrix, as shown by X-ray
diffraction and X-ray absorption spectroscopy
studies.

Full text not available from this repository.

More information

Published date: 11 September 2009
Keywords: lanthanides, matrix, metal-organic frameworks, polyisoprene, ziegler-natta polymerization

Identifiers

Local EPrints ID: 146127
URI: http://eprints.soton.ac.uk/id/eprint/146127
ISSN: 1022-1352
PURE UUID: ae726a06-9d1c-4279-8989-08287ce722c5

Catalogue record

Date deposited: 20 Apr 2010 15:19
Last modified: 17 Jul 2019 00:05

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