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Flame Retardant Mechanism of Silica

机译:二氧化硅的阻燃机理

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摘要

The results of a two year research project carried out with the "New Flame Retardants Consortium" are reported. This investigation into the flame retardant mechanism of silica gel and other forms of silica has determined that the silica FR mechanism is comprised of two main effects. The first is a reduction in the transport rate of the thermal degradation products by dramatically increasing the viscosity of the polymer melt due to hydrogen bonding of surface silanol groups and entanglement of polymer chains within the large pores of silica gel. Second is the reduction in thermal diffusivity of the sample near the surface due to gradual accumulation of silica, which acts as a thermal insulation layer.
机译:报告了与“新阻燃剂联盟”进行的为期两年的研究项目的结果。对硅胶和其他形式的二氧化硅的阻燃机理的研究确定了二氧化硅的FR机理包括两个主要作用。首先是由于表面硅烷醇基团的氢键键合和高分子链在硅胶大孔中的缠结而大大增加了聚合物熔体的粘度,从而降低了热降解产物的传输速率。第二个原因是由于二氧化硅的逐渐积累,该样品在表面附近的热扩散率降低,而二氧化硅是隔热层。

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