Highly efficient cis-1,4 polymerisation of isoprene using simple homoleptic amido rare earth-based catalysts

作者：Martins Nuno; Bonnet Fanny^*; Visseaux Marc

来源：Polymer, 2014, 55(20): 5013-5016.

DOI：10.1016/j.polymer.2014.07.056

• Polyisoprene
• Stereoselective
• Rare earths

Polymerisation of isoprene was performed by means of ternary catalytic systems made of LnfN(SiMe3)(2)](3) (Ln = Nd (1), Y (2))/borate/Al(Bu-i)(3) combinations (borate = [HNMe2Ph][B(C6F5)(4)] (HNB), [CPh3][B(C6F5)(4)] (TB) or B(C6F5)(3) (Barf)). With borate activator B(C6F5)(3), highly active (up to 4700 kg mol(-1)h(-1)) and selective catalysts are obtained with both neodymium and yttrium metals, leading up to 96% cis-1,4-polyisoprene.

• 出版日期2014-9-26