Modeling epoxy foams exposed to fire-like heat fluxes

被引:14
作者
Hobbs, ML [1 ]
机构
[1] Sandia Natl Labs, Albuquerque, NM 87185 USA
关键词
removable epoxy foam; decomposition; confinement; pressurization; adsorbed gases;
D O I
10.1016/j.polymdegradstab.2005.01.021
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A decomposition chemistry and heat transfer model to predict the response of removable epoxy foam (REF) exposed to fire-like heat fluxes is described. The epoxy foam was created using a perfluorohexane blowing agent with a surfactant. The model includes desorption of the blowing agent and surfactant, thermal degradation of the epoxy polymer, polymer fragment transport, and vapor-liquid equilibrium. An effective thermal conductivity model describes changes in thernial conductivity with reaction extent. Pressurization is modeled assuming: (1) no strain in the condensed-phase, (2) no resistance to gas-phase transport, (3) spatially uniform stress fields, and (4) no mass loss from the system due to venting. The model has been used to predict mass loss, pressure rise, and decomposition front locations for various small-scale and large-scale experiments performed by others. The framework of the model is suitable for polymeric foams with absorbed gases. Published by Elsevier Ltd.
引用
收藏
页码:353 / 372
页数:20
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