Abstract
Based on ready-made powder compositions of PEN-I materials modified with oxidized or thermally expanding graphite, fireresistant epoxy-novolac foams were obtained. By varying the content of the blowing agent, it is possible to control the apparent density of the foams within 100- 300 kg/m 3 . The physical and mechanical characteristics of the resulting foams were studied. A mathematical model for planning an experiment has been developed, which allows to determine the optimal composition. The results of tests to determine the resistance of foam samples to combustion showed that the resulting foams behave as fire-resistant structural materials.
Highlights
Based on ready-made powder compositions of PEN-I materials modified with oxidized or thermally expanding graphite, fireresistant epoxy-novolac foams were obtained
possible to control the apparent density of the foams within 100 300 kg
The results of tests to determine the resistance of foam samples to combustion showed that the resulting foams behave as fire-resistant structural materials
Summary
Based on ready-made powder compositions of PEN-I materials modified with oxidized or thermally expanding graphite, fireresistant epoxy-novolac foams were obtained. Для снижения горючести и повышения огнестойкости полимерных материалов используются специальные добавки – антипирены. Вместе с основными замедлителями горения для повышения огнестойкости полимерных материалов применяют: бор-, алюминий-, кремний-, металлсодержащие соединения; карбонаты; силикаты металлов и многое другое. Антипирены этой группы обычно используют в смеси с галоген- или фосфорсодержащими добавками, так как применение данного типа замедлителей горения в чистом виде зачастую не приводит к повышению огнестойкости в нужной степени.
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