Trans-stereospecific polymerization of butadiene and random copolymerization with styrene using borohydrido neodymium/magnesium dialkyl catalysts - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Polymer Journal Année : 2013

Trans-stereospecific polymerization of butadiene and random copolymerization with styrene using borohydrido neodymium/magnesium dialkyl catalysts

Résumé

The combination of a neodymium borohydride, Nd(BH4)3(THF)3 (1) or Cp*Nd(BH4)2(THF)x (2), with MgnBuEt (BEM), affords an efficient and highly selective (up to 96.7% 1,4-trans) catalyst for butadiene polymerization. In the presence of excesses of Mg co-catalyst, polymer chain transfer takes place between neodymium and magnesium, and significant amounts of 1,2-units are observed. When considered for butadiene-styrene statistical copolymerization, the catalytic system based on 2 showed a good ability to produce poly[(1,4-trans-butadiene)-co-styrene)], with strong impact of the Mg/Nd ratio on the yield and on the copolymer microstructure, including the percentage of inserted styrene (up to 16.9 mol%). Whatever the co-monomers concentration the polybutadiene backbone remained 1,4-trans. The precise microstructure of the polymers and copolymers was thoroughly analyzed by means of high resolution NMR spectroscopy (900 MHz) and MALDI-ToF spectrometry.
Fichier principal
Vignette du fichier
ManuscriptRev.pdf (494.34 Ko) Télécharger le fichier
SupData26062013.pdf (744.27 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Format Autre

Dates et versions

hal-00950265 , version 1 (05-03-2014)

Identifiants

Citer

Aude Ventura, Thomas Chenal, Marc Bria, Fanny Bonnet, Philippe Zinck, et al.. Trans-stereospecific polymerization of butadiene and random copolymerization with styrene using borohydrido neodymium/magnesium dialkyl catalysts. European Polymer Journal, 2013, 49 (12), pp.4130-4140. ⟨10.1016/j.eurpolymj.2013.09.019⟩. ⟨hal-00950265⟩
607 Consultations
1140 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More