Thermomechanical characterization of thermoset urethane shape-memory polymer foams
| Autor: | Linda A. Domeier, April Nissen, James R. McElhanon, Steven H. Goods, LeRoy L. Whinnery |
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| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Strain (chemistry) Thermosetting polymer General Chemistry Polymer Compression (physics) Surfaces Coatings and Films Characterization (materials science) Shape-memory polymer chemistry Materials Chemistry Recovery performance Composite material |
| Zdroj: | Journal of Applied Polymer Science. 115:3217-3229 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.31413 |
| Popis: | The shape-memory polymer performance of urethane foams compressed under a variety of conditions was characterized. The foams were water-blown thermosets with a closed-cell structure and ranged in density from about 0.25 to 0.75 g/cm3. Compressive deformations were carried out over a range of strain levels, temperatures, and lateral constraints. Recovery stresses measured between fixed platens were as high as 4 MPa. Recovery strains, measured against loads up to 0.13 MPa, demonstrated the effects of various parameters. The results suggest that compression near the foam glass-transition temperature provided optimal performance. Foams with densities of about 0.5 g/cc and compressed 50% provided a useful balance (time, strain, and load) in the recovery performance. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 |
| Databáze: | OpenAIRE |
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