期刊
POLYMER DEGRADATION AND STABILITY
卷 91, 期 10, 页码 2275-2281出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2006.04.014
关键词
POSS; polysilsesquioxane; flame retardancy; metal-POSS; cone calorimeter; combustion
This paper deals with the study of the combustion properties of dimeric and oligomeric Al-and Zn-isobutyl silsesquioxane (POSS)/polypropylene (PP) composites, in comparison with neat PP and PP/octaisobutyl POSS. The presence of Al-POSS leads to a decrease in combustion rate with respect to PP, resulting in a decrease of Heat Release Rate (-43% at 10 wt% POSS loading) as well as reduction in CO and CO2 production rates, whereas a negative effect on the above parameters is obtained with octaisobutyl POSS. Zn-POSS does not significantly affect the PP combustion behaviour. The effect of Al-POSS is most likely related to its chemical activity, which favours the formation of a moderate amount of char residue, by catalysing secondary reactions in the polymer during combustion. (c) 2006 Elsevier Ltd. All rights reserved.
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