Fire retardancy of ethylene-vinyl acetate composites - Evaluation of synergistic effects between ATH and diatomite fillers

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• 作者：Florian Cavodeau^a ; Belkacem Otazaghine^a ; ^{belkacem.otazaghine@mines-ales.fr" class="auth_mail" title="E-mail the corresponding author} ; Rodolphe Sonnier^a ; José ; -Marie Lopez-Cuesta^a ; Christelle Delaite^b
• 关键词：Flame retardancy ; Barrier effect ; ATH ; EVA ; Diatomite
• 刊名：Polymer Degradation and Stability
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：129
• 期：Complete
• 页码：246-259
• 全文大小：3327 K

文摘

In the present work, diatomite was used as co-filler in aluminium hydroxide/ethylene-vinyl acetate composites (ATH/EVA). This silica-based marine sediment acts as a synergistic agent with ATH, to increase the flame retardant properties of EVA composites. When diatomite was used with ATH the formation of an expanded layer during cone calorimetry tests was observed. This layer presents a complex structure which better insulates the sample and reduces the heat release rate (HRR). Rheological measurements, such as complex viscosity obtained with an ARES apparatus, suggest an influence of the viscosity of the sample melt. We assume that the viscosity of the EVA composites is influenced by the porosity of the diatomite. Better residue cohesion was also obtained in presence of diatomite.