Influence Of Hydrolytic Degradation On Properties Of Moisture Membranes Used In Fire-Protective Clothing

• Main Authors: Aidani, Rachid El, Nguyen-Tri, Phuong, Vu-Khanh, Toan
• Format: Text
• Language: English
• Published: Zenodo 2015
• Subjects: Hydrolytic ageing; moisture membrane; water vapor permeability; morphology.; Arctic
• Online Access: https://dx.doi.org/10.5281/zenodo.1108810; https://zenodo.org/record/1108810

This study intends to show the influence of the hydrolytic degradation on the properties of the e-PTFE/NOMEX® membranes used in fire-protective clothing. The modification of water vapour permeability, morphology and chemical structure was examined by MOCON Permatran, electron microscopy scanning (SEM), and ATR-FTIR, respectively. A decrease in permeability to water vapour of the aged samples was observed following closure of transpiration pores. Analysis of fiber morphology indicates the appearance of defects at the fibers surface with the presence of micro cavities. ATR-FTIR analysis reveals the presence of a new absorption band attributed to carboxylic acid terminal groups generated during the amide bond hydrolysis. : {"references": ["El Aidani, R., Dolez, P., Vu-Khanh, T. Effect of thermal aging on the\nmechanical and barrier properties of an e-PTFE/Nomex\u00ae moisture\nmembrane used in firefighters' protective suits. J. of Applied Polymer\nSci. 121(5), 3101\u20133110 (2011).", "El Aidani, R. Nguyen-Tri, P., Malajati, Y., Vu-Khanh, T. Photochemical\naging of an e-PTFE/NOMEX (R) membrane used in firefighter\nprotective clothing. Polymer Degradation and Stability. 98(7), 1300\u2013\n1310 (2013).", "Lawson, J.R. Fire Fighters' Protective Clothing and Thermal\nEnvironments of Structural Fire Fighting, National Institute of Standards\nand Technology, NISTIR 5804, Gaithersburg, MD, (1996).", "Zimmerli, T. Contact Heat Testing of Dry and Wet Firefighters Gloves,\npresented at the Quality and Usage of Protective Clothing Symposium,\nKittil & Finland, February 5-7, (1992).", "Rossi, R.M., Zimmerli, T. Influence of Humidity on the Radiant,\nConvective and Contact Heat Transmission Through Protective\nMaterials, Performance of Protective Clothing: Fifth Volume, ASTM\nSTP 1237, J.S. Johnson and S.Z. Mansdorf, eds., American Society for\nTesting and Materials, West Cgnshohocken, PA, 269-280,(1996).", "Zimmerli, T., Weder, M. 6th Volume, ASTM STP 1273. J.O. Stull and\nA.D. Schwope, eds., American Society for Testing and Materials, West\nConshohocken, PA (in press).", "Veghte, J.H., Fire Technolo, 23, 313-322, (1987).", "Makinen, H., Smolander, J., Vuorinen, H. ASTM STP 989, S.Z.\nMansdorf, R. Sager and A.P. Nielsen, eds., American Society for\nTesting and Materials, West Conshohocken, PA. 415-421 (1988).", "Trong-Ming, D., Chiu, W.Y. Journal of Applied Polymer Science\n43(12): 2193-2199, (1991)\n[10] Zhu, Cai, Z.E. Effects of temperature and humidity on the polyurethane\npropellant aging by FEM. Tuijin Jishu/Journal of Propulsion Technology\n18(4), 80-83, (1997).\n[11] Mclntyre, J. E. Aramid fibres. Review of Progress in Coloration and\nRelated Topics 25(1), 44-56, (1995).\n[12] Panar, M., Avakian, P. Morphology of poly(p-phenylene\nterephthalamide) fibers. Journal of Polymer Science, Polymer Physics\nEdition 21(10), 1955-1969, (1983).\n[13] Thominette, F., Merdas, I., Verdu J. Ageing of PA 11 pipes in CO2\nmedium: a tool to predict their residual lifetime, In: Proc. of the twentyfirst\ninternational conference on offshore mechanics and arctic\nengineering. 3, 15\u201321, (2002).\n[14] Morgan, R.J. Butler Hydrolytic degradation mechanism of Kevlar 49\nfibers when dissolved in sulfuric acid Polym Bull, 27, 689\u2013696, (1992).\n[15] Meyer, N. Jones, Y. Lin, D. Kranbuehl Characterizing and modeling the\nhydrolysis of polyamide-11 in a pH 7 water environment,\nMacromolecules, 35, 2784\u20132798,(2002).\n[16] Auerbach I. Kinetics for the degradation of nylon and Kevlar parachute\nmaterials. Collection of technical papers \u2013 AIAA ninth aerodynamic\ndecelerators and balloon technology conference. 254\u2013262, (1986)."]}