SciELO - Scientific Electronic Library Online

 
vol.27 número4Effect of concentrations of plasticizers on the sol-gel properties developed from alkoxides precursors índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

GUILHERME, Fernanda et al. Evaluation of Out-of-Autoclave (OOA) epoxy system. Polímeros [online]. 2017, vol.27, n.4, pp.353-361. ISSN 0104-1428.  https://doi.org/10.1590/0104-1428.16016.

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.

Palavras-chave : DMA; DSC; epoxy system; FT-IR; OOA.

        · texto em Inglês     · Inglês ( pdf )