Evidence is given that the thermal behaviour of a mixture of polypropylene and a fire retardant chlorinated paraffin (Cl 70%) is not the sum of their individual behaviours. An interaction is shown to take place in the degrading mixtures which is related to the low temperature dehydrochlorination step of the chloroparaffin. This occurs at temperatures at which pure polypropylene is stable and leads to an increase in the overall rate of volatilisation of the mixtures compared with that of the separate components. A partial overlapping of volatilisation of polymer and additive, which otherwise degrade in two well separated temperature ranges when heated alone, is observed. The relevance of these observations to the mechanism of fire retardance is discussed.

Thermal degradation of polymer - fire retardant mixtures. Part I: Polypropylene - chlorinated paraffin. Evidence of interaction / Camino, Giovanni; Costa, L.. - In: POLYMER DEGRADATION AND STABILITY. - ISSN 0141-3910. - 3:6(1981), pp. 423-430.

Thermal degradation of polymer - fire retardant mixtures. Part I: Polypropylene - chlorinated paraffin. Evidence of interaction

CAMINO, GIOVANNI;
1981

Abstract

Evidence is given that the thermal behaviour of a mixture of polypropylene and a fire retardant chlorinated paraffin (Cl 70%) is not the sum of their individual behaviours. An interaction is shown to take place in the degrading mixtures which is related to the low temperature dehydrochlorination step of the chloroparaffin. This occurs at temperatures at which pure polypropylene is stable and leads to an increase in the overall rate of volatilisation of the mixtures compared with that of the separate components. A partial overlapping of volatilisation of polymer and additive, which otherwise degrade in two well separated temperature ranges when heated alone, is observed. The relevance of these observations to the mechanism of fire retardance is discussed.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/1430117
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