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High resolution solution and solid state NMR characterization of ethylene/1-butene and ethylene/1-hexene copolymers fractionated by preparative temperature rising elution fractionation |
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| Authors: | HJ Assumption WL Jarrett AJ van Reenen |
| Affiliation: | a Sasol Technology R&D, P.O. Box 1, Sasolburg 1947, South Africa b Department of Polymer Science, University of Southern Mississippi, 118 College Drive #10076, Hattiesburg, MS 39406-0076, USA c Department of Chemistry and Polymer Science, University of Stellenbosch, P/Bag X1, Matieland 7602, South Africa |
| Abstract: | Preparative TREF was used to fractionate 2 commercial LLDPE polymers. These polymers had similar MFI values, density and comonomer content, but differed in comonomer type, 1-butene vs 1-hexene. High resolution solution NMR and solid state NMR was used to characterize the copolymer fractions. Distinct differences in chemical composition distribution could be observed from solution NMR results, and these correlated well with solid state analyses. Conclusions regarding the molecular make-up and crystallization phenomena are made. |
| Keywords: | Polyolefins High resolution 13C NMR Fractionation |
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