Multidimensional Analysis of the Complex Composition of Impact Polypropylene Copolymers: Combination of TREF, SEC-FTIR-HPer DSC, and High Temperature 2D-LC
| Autor: | Gareth W. Harding, Sadiqali Cheruthazhekatt, Thijs F. J. Pijpers, Harald Pasch, Vincent Mathot |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Molar mass Polymers and Plastics Elution Organic Chemistry Size-exclusion chromatography technology industry and agriculture Analytical chemistry Fractionation law.invention Inorganic Chemistry Crystallinity Differential scanning calorimetry law Materials Chemistry Crystallization Thermal analysis |
| Zdroj: | Macromolecules. 45:2025-2034 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma2026989 |
| Popis: | A new multidimensional fractionation technique, temperature rising elution fractionation (TREF) combined with high temperature size exclusion chromatography FTIR (HT-SEC-FTIR), HT-SEC-DSC and high temperature two-dimensional liquid chromatography (HT-2D-LC) is used for the comprehensive analysis of a commercial impact polypropylene copolymer. HT-SEC-FTIR provides information regarding the chemical composition and crystallinity as a function of molar mass. Thermal analysis of selected SEC fractions yields the melting and crystallization behavior of these fractions which is related to the chemical heterogeneity of this complex copolymer. The thermal analysis of the fractions is conducted using a novel DSC method — high speed or high performance differential scanning calorimetry (HPer DSC) - that allows measuring of minute amounts of material down to micrograms. The most interesting and complex “midelution temperature” TREF fraction (80 °C) of this copolymer is a complex mixture of ethylene-propylene copolym... |
| Databáze: | OpenAIRE |
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