Publication | Closed Access
Microstructure and pressure—volume—temperature properties of ethene/1-octene random copolymers
10
Citations
0
References
1998
Year
Macromolecular ChemistryEngineeringCharacteristic PressureOrganic ChemistryChemistryHomopolymer BlendsPolymersChemical EngineeringMacromolecular EngineeringCharacteristic TemperaturePolymer ProcessingPolymer ChemistryMaterials ScienceEthene/1-octene Random CopolymersPolymer AnalysisBlock Co-polymersPolymer ScienceApplied PhysicsPolymer CharacterizationPolymer PropertyPolymerization KineticsPolymer Synthesis
Copolymers of ethene and 1-octene were synthesized covering the entire composition range by means of the methylalumoxane activated rac-Me2Si(2-MeBenz[e]Ind)2ZrCl2 catalyst. 13C-NMR spectroscopy revealed first-order Markov statistics to be reasonably suited for the description of the copolymer sequence distribution. Characteristic parameters of ethene/1-octene copolymers were obtained by evaluation of pressure—volume—temperature data using the Flory—Orwoll—Vrij equation-of-state theory. The characteristic pressure could not be correlated with 1-octene comonomer incorporation when assuming validity of the mixing rules known for homopolymer blends, whereas the characteristic specific volume and characteristic temperature are independent of copolymer composition within experimental errors. A possible explanation is presented for why the attempts to predict the characteristic pressure of ethene/1-octene copolymers from the corresponding homopolymer parameters fail using Flory′s mixing rules.