| Autor: |
D. Kranbuehl, Alfred C. Loos, B. Tan, James E. McGrath, R. H. Mehta, T. A. Bullions |
| Rok vydání: |
1999 |
| Předmět: |
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| Zdroj: |
Composites Part A: Applied Science and Manufacturing. 30:153-162 |
| ISSN: |
1359-835X |
| DOI: |
10.1016/s1359-835x(98)00111-0 |
| Popis: |
A phenylethynylphthalic anhydride terminated poly(etherimide) oligomer with a molecular weight of M n =3000 g mole −1 has been synthesized for use in high-performance composite and adhesive applications. This reactive poly(etherimide) exhibits excellent thermo-oxidative stability and solvent resistance upon curing at high temperatures. Towpreg has been produced by coating unsized, G30-500, 12k carbon fiber tow with this oligomer in a powder form. A minimal dry powder prepregging technique was employed for rapid processing to circumvent the problems associated with high viscosity and to perform the operation in an organic solvent-free environment. This towpreg has been manufactured into flat composite laminates via manual lay-up and hot press consolidation and cure. The Mode I and Mode II fracture toughness of these composite panels has been investigated via the double cantilever beam (DCB) and end-notch flexure (ENF) test methods. Fracture surface and microstructure features are correlated with the measured mechanical properties. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect