Stress Relaxation Profiles of Molded and Extruded Thermoplastics Using Dynamic Mechanical Analysis
| Autor: | Donna Dykeman, Pearl Lee-Sullivan |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Morphology (linguistics) Materials science Polymers and Plastics Mechanical Engineering Dynamic mechanical analysis Polymer Polyethylene Viscoelasticity chemistry.chemical_compound chemistry Mechanics of Materials visual_art Stress relaxation visual_art.visual_art_medium Materials Chemistry Ceramics and Composites Polycarbonate Composite material Elastic modulus |
| Zdroj: | Journal of Reinforced Plastics and Composites. 20:1100-1111 |
| ISSN: | 0731-6844 |
| Popis: | The stress relaxation profiles across the skin-core-skin layers of injection molded polycarbonate and extruded polyethylene sheet are presented. The profiles were obtained by progressively removing the layers followed by stress relaxation tests using a Dynamic Mechanical Analyzer (DMA). The machined layers were characterized using the elastic modulus, Eo, and the relaxation time, o. It was found that the DMA was able to distinguish the differences in viscoelastic response across the thickness of the polymer samples. The variation in behaviour was consistent with the expected morphology and molecular orientation developed due to the processing method. |
| Databáze: | OpenAIRE |
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