Mechanical Properties of Poly(ethylene-co-methacrylic acid) Reinforced with Carbon Fibers
| Autor: | Darko Ivančević, Tatjana Haramina, Daniel Pugar, Ivica Smojver |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Compression molding Young's modulus E/MAA composite carbon fibers mechanical properties self-healing dynamic mechanical analysis ballistic tests thermal history compression molding 02 engineering and technology 010402 general chemistry 01 natural sciences Article lcsh:QD241-441 symbols.namesake chemistry.chemical_compound lcsh:Organic chemistry Flexural strength Ultimate tensile strength Fiber Composite material chemistry.chemical_classification General Chemistry Polymer Dynamic mechanical analysis 021001 nanoscience & nanotechnology 0104 chemical sciences Methacrylic acid chemistry symbols 0210 nano-technology |
| Zdroj: | Polymers Polymers, Vol 13, Iss 165, p 165 (2021) Polymers; Volume 13; Issue 1; Pages: 165 |
| ISSN: | 2073-4360 |
| Popis: | The capability of poly(ethylene-co-methacrylic acid) (E/MAA) to self-heal is well known, however, its mechanical properties are weak. In this study, composites with single and double layers of unidirectional (UD) carbon fibers were prepared by compression molding. Even a low mass fraction of fibers substantially improved the polymer. The flexural and tensile properties were tested at 0°, 45° and 90° fibers direction and compared to those of the matrix. The mechanical properties in the 0° direction proved superior. Flexural properties depended on the reinforcement distance from the stress neutral plane. The tensile modulus in the 0° direction was 13 times greater despite only a 2.5% mass fraction of fibers. However, both tensile modulus and strength were observed to degrade in the 90° direction. Dynamic mechanical analysis showed the dependence of both structure and properties on the thermal history of E/MAA. Tensile tests after ballistic impact showed that the modulus of the self-healed E/MAA was not affected, yet the strength, yield point, and particularly the elongation at break were reduced. A composite with higher fiber content could be prepared by mixing milled E/MAA particles in fibers prior to compression. |
| Databáze: | OpenAIRE |
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