Studies on the temperature dependence of extinction oxygen index values for cellulosic fabrics. II. Commercial quality flame‐retarded cotton

Horrocks, Richard ORCID: 0000-0003-1431-058X, Price, Dennis and Tunc, M. (1989) Studies on the temperature dependence of extinction oxygen index values for cellulosic fabrics. II. Commercial quality flame‐retarded cotton. Journal of Applied Polymer Science, 37 (4). pp. 1051-1061. ISSN 0021-8995

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Abstract

Extinction oxygen index (EOI) and the derived value at zero ignition time [EOI]o have been determined for a series of commercial quality flame‐retarded cotton fabrics in the temperature range 20 to 200°C. The flame retardants used were Proban‐CC (Albright and Wilson Ltd.) and Pyrovatex‐CP (Ciba‐Geigy). For all the flame‐retarded cotton fabrics studied, EOI and [EOI]o decreased with increase in temperature. The influence of conditioned area density M at a given temperature can be predicted via the linear relationship [EOI]0=E0+E1M Substitution of moisture correted area density data had negligible influence on the calculated values of Eo and E1. The dependence of [EOI]o on area density, E1, has a negative temperature dependence. The similarly temperature dependent term Eo is the “intrinsic oxygen‐index,” which is independent of ignition and area density variables. For a given flame retardant this represents the fabric properties where maximum access of oxygen is possible. In all cases studied, Eo > E1 and so the temperature dependence of [EOI]o is largely determined by Eo. Values obtained for the fractional increase in Eo, with respect to its value at 20°C, with increasing temperature indicate that the temperature sensitivity of the burning behavior of cotton is greater than that of Proban‐CC‐treated cotton, which itself is greater than that of Pyrovatex CP‐treated cotton. It is inferred that effective flame‐retardants should not only function under ambient conditions but also reduce the temperature sensitivity of the inherent fibre‐burning behavior at elevated temperatures.

Item Type: Article
Divisions: University of Bolton Research Centres > Institute for Materials Research and Innovation
Depositing User: Tracey Gill
Date Deposited: 10 Aug 2018 14:55
Last Modified: 10 Aug 2018 14:56
Identification Number: 10.1002/app.1989.070370417
URI: http://ubir.bolton.ac.uk/id/eprint/1848

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