6533b86efe1ef96bd12cb67d
RESEARCH PRODUCT
Improvement of biphasic polymerization by application of binary ionic liquid mixture
Katarzyna DziubekWioletta Ochędzan-siodłaksubject
chemistry.chemical_classificationbiphasic processpolyethyleneMaterials scienceProcess Chemistry and TechnologyGeneral Chemical EngineeringInorganic chemistryEnergy Engineering and Power TechnologyGeneral ChemistryPolymerPost-metallocene catalystPolyethylenemetallocene catalystIndustrial and Manufacturing EngineeringHexanechemistry.chemical_compoundCrystallinitychemistryPolymerizationPhase (matter)Ionic liquidionic liquiddescription
Abstract The mixture of two ionic liquids, 1- n -butyl-3-methylimidazolium and 1-(2-phenylethyl)-3-methylimidazolium chloroaluminates, [C 4 -mim][AlCl 4 ] and [PhC 2 -mim][AlCl 4 ], were applied as a medium to immobilize the Cp 2 TiCl 2 titanocene catalyst for biphasic ionic liquid/hexane ethylene polymerization. The system makes possible to perform the reaction at lower temperatures, below the melting temperature of the aralkyl ionic liquid. A better separation of the ionic liquid phase was observed and an easier mass transfer of the polymer product from the ionic liquid to the hexane phase was obtained. The polyethylene reveals bimodal distribution of molecular weight. It is characterized by a high bulk density (500 g/dm 3 ) and crystallinity degree (86%). The recycling of the ionic liquid medium containing the catalyst activated by AlEtCl 2 , results in the highest yield obtained in such systems (550 kg PE(mol Ti) −1 ).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-10-01 | Chemical Engineering and Processing |