Effects of fillers on and the role of hydrogen chloride in the behaviour of PVC in fires
作者:
George Matthews,
George S. Plemper,
期刊:
British Polymer Journal
(WILEY Available online 1984)
卷期:
Volume 16,
issue 1
页码: 34-38
ISSN:0007-1641
年代: 1984
DOI:10.1002/pi.4980160107
出版商: John Wiley&Sons, Ltd
数据来源: WILEY
摘要:
AbstractCalcium carbonate fillers react with hydrogen chloride liberated during pyrolysis of PVC to an extent depending on their particle sizes and concentrations. The effects of these and other fillers on the critical oxygen index is more complex and depends on a number of factors additional to the extent of hydrogen chloride retention, of which char formation in particular is not readily assessed numerically. Differential thermal analyses suggest that the reaction of hydrogen chloride with calcium carbonate or calcium oxide fillers proceeds rapidly upon liberation. Hydrogen chloride added to the gas stream raises the critical oxygen index to a considerably greater extent than do carbon dioxide or nitrogen. It is concluded that the exotherm due to reaction between calcium carbonate fillers and pyrolysis hydrogen chloride contributes only slightly to flammability, and that the involvement of hydrogen chloride in reducing flammability is chemical rather than physical.
点击下载:
PDF
(471KB)
返 回