Rubber vulcanization method for FBG pressure sensors

Abstract This paper presents the experimental analysis of vulcanization process nitrile rubbers for diaphragms fabrication used in FBG-based pressure sensors. Tests using with different rubber thicknesses (0.5mm, 1.0mm, and 1.5mm), temperatures (125°C, 150°C, 200°C), times (2.5min 5.0min) were performed to analyse chemical degradation diaphragms. Degradation was digital macrography diaphragm surfaces stiffness analysed by tensile tests. An FBG embedded which vulcanized temperature time resulted lowest degradation, a compression test performed. Results show that at 125°C presented smaller areas, 0.5mm an area mean 17.5%, whereas 1.0mm 14.5%, 1.5mm showed 11.0%. Moreover, greater thickness led degraded same time. Thus, rubber, higher results material stiffness, where is directly related reduction cross-links due area. sensitivity 11.67kPa/mm wavelength 456.1pm/mm thicknesses, 18.04kPa/mm sensitivity, 112.3pm/mm 31.55kPa/mm 913.8pm/mm thickness. It concludes obtained when comparing wavelength.