Evaluation of Out-of-Autoclave (OOA) epoxy system
| Autor: | Fernanda Guilherme, Silvana Navarro Cassu, Milton Faria Diniz, Tanila Penteado de Faria Gonzales Leal, Natália Beck Sanches, Rita de Cássia Lazzarini Dutra |
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| Jazyk: | English<br />Portuguese |
| Předmět: | |
| Zdroj: | Polímeros, Vol 27, Iss 4, Pp 353-361 |
| Druh dokumentu: | article |
| ISSN: | 1678-5169 0104-1428 |
| DOI: | 10.1590/0104-1428.16016 |
| Popis: | Abstract Epoxy resins (EP) usually cure in autoclave to minimize resin voids and to achieve the desired resin/fiber ratio. Cure parameters such as temperature, vacuum and pressure levels are controlled and monitored. Aiming time and cost optimization, new out-of-autoclave (OOA) cure processes have been developed lately. This study evaluated the cure cycle and the effect of non-programmed interruptions in an OOA process. Fourier Transform Infrared spectroscopy (FT-IR) results show similarities between the resin used and diglycidyl ether of bisphenol A (DGEBA) and also that the curing system is composed of cyan and sulfur hardeners, codified in industry, as Components of #2511 Resin System. The cure cycle and its interruptions were simulated by dynamic-mechanical analysis (DMA). The samples obtained were evaluated by FT-IR and differential scanning calorimetry (DSC), whose results show that the degree of cure varying between 0.8 to 0.85 was achieved at 120 °C. |
| Databáze: | Directory of Open Access Journals |
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