Bromo-butyl Rubber for Face Piece of a Respiratory Mask

Defence Science Journal

N.S. Kumar²  Nirmala L.²  Upendra Simha¹  Leeladhar Gaikwad²  G. K. Kannan¹ 

[1] Defence Bioengineering and Electromedical Laboratory, Bangalore;High Energy Materials Research Laboratory, Pune

关键词: Respiratory mask;    degradation;    bromo-butyl;    thermal oxidation;    saline exposure;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

Respiratory mask contains a number of components made of materials like rubber, plastics, and metals. Out of all the components, face piece is the main component exposed to the external environment. This study aims to evaluate degradation of bromo-butyl rubber. The experiments were carried out for thermal exposure, swelling study, saline exposure, etc. It is observed that the elongation at break was increased by 10 per cent when these were exposed to 100 oC. However, the tensile strength has been observed to decrease by 50 per cent when exposed to 55 oC. It is decreased to around 63 per cent when exposed to 80 oC and 100 oC. The morphological appearance of unaged sample was intact. Only samples at 120 oC aged for 48 h appeared to have developed minor cracks of <0.01 µm. There were no significant changes observed when the samples were exposed to saline (3 % NaCl) and artificial sweat solution. Defence Science Journal, 2009, 59(5), pp.505-511, DOI:http://dx.doi.org/10.14429/dsj.59.1552

【 授权许可】

Unknown