Use of DTA with infrared analysis of evolved gas to investigate the effect of flame retardants on gas evolution from pyrolysed cellulose (cotton)

Wiley - Tập 20 Số 1 - Trang 61-67 - 1988
Dennis Price1, A. Richard Horrocks2, Mehmet Akalın1
1Department of Chemistry and Applied Chemistry, University of Salford, Salford M5 4WT, UK
2Department of Textile Studies, Bolton Institute of Higher Education, Bolton BL3 5AB, UK

Tóm tắt

AbstractDTA combined with infrared analysis of the evolved gas (EGA) has been used to study the temperature behaviour, both in air and nitrogen, of commercial phosphorus‐ and nitrogen‐ and/or bromine‐containing flame retardants applied to cotton. By reference to the DTA traces and also the maxima occurring in the CO, CO2 and H2O evolution rates, seven significant peak temperatures were assigned. Two new relatively low temperature peaks have been observed: the higher of these is DTA‐sensitive and occurs in all unretarded and retarded samples and is ascribed to the formation of an ‘activated cellulose’ state previously proposed by Bradbury, Sakai and Shafizadeh;17 the lower peak is an exotherm (188‐220°C) associated with H2O and CO2 evolution from flame‐retarded samples only. These observations are interpreted in terms of the mechanism of the cellulose pyrolysis/combustion and the influence of the flame retardants.

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Thông tin xuất bản

Wiley

Tập 20 Số 1

61-67

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