Rheological and Morphological Properties of Various Blends Containing Liquid Crystalline Polyesters
| Autor: | Christian Friedrich, Stefan Trinkle, Hans R. Kricheldorf, Botho Hoffmann |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Thermoplastic Materials science Polymers and Plastics Organic Chemistry Polymer Condensed Matter Physics Viscoelasticity Polyester chemistry.chemical_compound Rheology chemistry Polymer chemistry Materials Chemistry Polymer blend Polystyrene Physical and Theoretical Chemistry Methyl methacrylate |
| Zdroj: | Macromolecular Chemistry and Physics. 202:814-823 |
| ISSN: | 1521-3935 1022-1352 |
| DOI: | 10.1002/1521-3935(20010301)202:6<814::aid-macp814>3.0.co;2-3 |
| Popis: | This contribution is concerned with the unique rheological properties of blends of liquid crystalline polymers (LCP) dispersed in thermoplastic matrices. The materials under investigation were rigid rod polyesters solution blended with poly(e-caprolactone), polypropene, polystyrene or poly(methyl methacrylate) as matrix polymers. Oscillatory measurements of these melted blends revealed that LCP contents of only 1 wt.-% cause the dynamic shear moduli to increase at low frequencies by a factor of several magnitudes compared to the neat matrices. The extraordinary effect is primarily governed by a spatial arrangement of the LCP molecules forming a network as shown by microscopy. The different strength of this effect in different matrices is explained by the interaction between matrix and LCP. |
| Databáze: | OpenAIRE |
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