Fractional crystallization of polypropylene
| Autor: | Pandurang M. Kamath, Leslie Wild |
|---|---|
| Rok vydání: | 1966 |
| Předmět: |
chemistry.chemical_classification
Polypropylene Work (thermodynamics) Reproducibility Materials science Polymers and Plastics Xylene Thermodynamics General Chemistry Polymer Characterization (materials science) chemistry.chemical_compound chemistry Materials Chemistry Organic chemistry Fractional crystallization (chemistry) Extraction methods |
| Zdroj: | Polymer Engineering and Science. 6:213-216 |
| ISSN: | 1548-2634 0032-3888 |
| DOI: | 10.1002/pen.760060307 |
| Popis: | The development of a fractional crystallization technique for characterization of polypropylenes with respect to stereoregularity is described. It is a simple technique which is attractive for routine analysis and under suitable conditions yields quantitative data with good reproducibility. Separation by fractional crystallization from hot xylene solution is shown to take place according to polymer crystallizability and is relatively independent of molecular weight. It thus represents an alternative and in some ways superior approach to the more commonly used fractional extraction method. Preliminary work indicates that the fractional crystallization method may prove of value in establishing correlations between the stereoregular nature of polypropylenes and their physical properties. |
| Databáze: | OpenAIRE |
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