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Title: Thermal ageing studies of bromo-butyl rubber used in NBC personal protective equipment
Authors: Kannan, G K
Gaikewad, L V
Nirmala, L
Kumar, N S
Keywords: Bromo-butyl rubber (BBR);NBC equipment;Thermal ageing;Thermal oxidation
Issue Date: Nov-2010
Publisher: NISCAIR-CSIR, India
Abstract: This study evaluates degradation and stability of bromo-butyl rubber (BBR) used in NBC personal protective equipment. Elongation increased by 10% when BBR was exposed to -65°C as well as 100°C. Tensile strength decreased by 50% when exposed to -65°C and also at 55°C, and decreased to around 63% when exposed to 80° and 100°C. Morphological appearance at 80°C aged sample was intact and comparable with unaged samples. BBR exposed to 120°C developed minor cracks (<0.01 µm). Life prediction was 89 and 25 years for exposed usage temperature of 40° and 50°C respectively. Since survival of personnel who don these equipments is involved the shelf life for equipments made of this particular formulation shall be safely considered at 50% of predicted life for respective temperatures.
Page(s): 841-849
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.69(11) [November 2010]

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