High-performance liquid-crystalline polymer films for monolithic 'composites'
| Autor: | Ton Peijs, Raphael Schaller, Theo A. Tervoort |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Specific modulus Materials science Composite number 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Thermotropic crystal Viscoelasticity 0104 chemical sciences chemistry Mechanics of Materials Ultimate tensile strength Ceramics and Composites Adhesive Composite material 0210 nano-technology Sandwich-structured composite |
| Zdroj: | Composites Part A: Applied Science and Manufacturing. 81:296-304 |
| ISSN: | 1359-835X |
| DOI: | 10.1016/j.compositesa.2015.11.024 |
| Popis: | Highly oriented, free-standing films of a thermotropic liquid-crystalline polymer (LCP) were prepared using a new processing technique, referred to as “foil-spintrusion”. These films underwent solid-state fusion at elevated temperatures to yield homogeneous, self-reinforced monolithic “composites” without the use of additional adhesives. In this study, unidirectional LCP monoliths were evaluated for their mechanical performance. The monoliths exhibited highly anisotropic behavior, with stiffness and tensile strength along the direction of orientation of around 65 GPa and 1.7 GPa, respectively, combined with excellent damping properties in the viscoelastic regime. In addition, experiments showed that the material has a high tensile strength (>2.2 GPa) at high strain rates, indicating promising behavior under high impact conditions. As expected for such highly oriented polymer systems, the monoliths were found to exhibit poor compressive and shear strengths due to low internal coherence of the material itself. However, it was shown that the LCP monoliths could be useful for applications requiring high specific stiffness, for example as facings for composite sandwich panels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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