Development of a quantitative analysis method for polypropylene additives using on-line SFE/SFC
| Autor: | Claude Bunel, Jovanka Huguet, Frédérique Martial |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Polypropylene
chemistry.chemical_classification Chromatography Polymers and Plastics Chemistry Calibration curve Organic Chemistry Extraction (chemistry) Supercritical fluid extraction Analytical chemistry Polymer Supercritical fluid chemistry.chemical_compound Materials Chemistry Supercritical fluid chromatography Particle size |
| Zdroj: | Polymer International. 48:299-306 |
| ISSN: | 1097-0126 0959-8103 |
| DOI: | 10.1002/(sici)1097-0126(199904)48:4<299::aid-pi148>3.0.co;2-5 |
| Popis: | A procedure is described for the quantitative analysis of (Irganox 1076, Irganox 1010 and Tinuvin 327) in polypropylene matrices using on-line SFE/SFC. The effects of pressure, extraction time, type of matrix (particle or film) and matrix parameters (particle size, film thickness, sample weight) are studied in order to optimize supercritical fluid extractions. The collection efficiency is determined from the recovery of known concentrations of compounds. About 30% of extracts are lost during collection. Calibration curves for polymer samples are established from ground polymer (particle size 100 μm < d < 160 μm) and polymer film (30 μm thickness) under the optimum supercritical fluid extraction conditions. The three additives are incorporated together into polymer at concentrations ranging from 0.04% to 0.6%. Very poor recoveries are obtained from ground samples, but we observed very good recoveries from films (45-70% depending on the additive) and calibration curves were established for the different antioxidants. |
| Databáze: | OpenAIRE |
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