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Synergistic Effect of Modified MCM-41 and Flame Retardants on Performance of PP System

Na Wang, Yuxian Wu, Jing Lin Zhang, Xuri Li, Qinghong Fang

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Abstract

The mesoporous material MCM-41 was modified by DOPO in order to improve its effectiveness as a synergist agent for fire retardant composite. Ammonium polyphosphate(APP)-pentaerythritol(PER)- melamine(MEL) as flame retardants and modified MCM- 41 as synergist agent were used to fabricate intumescent flame retardant(IFR)-polypropylene(PP). The synergist effect of modified MCM-41 and IFR on flame retardancy, mechanical property and thermal property of composite PP were investigated. It was found that 1%(mass fraction) modified MCM-41 could obviously improve the flame retardancy of the composite PP with a high LOI value 32.6, which is around 91.76 % higher than that of pure PP. Results of TGA, DMA and SEM showed that MCM-41 could catalyze esterification reaction between IFR, increase the char residue and form much denser char- layer to improve the retardant performance of the materials.

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What this paper is about

The mesoporous material MCM-41 was modified by DOPO in order to improve its effectiveness as a synergist agent for fire retardant composite. Ammonium polyphosphate(APP)-pentaerythritol(PER)- melamine(MEL) as flame retardants and modified MCM- 41 as synergist agent were used to fabricate intumescent flame retardant(IFR)-polypropylene(PP). The synergist effect of modified MCM-41 and IFR on flame retardancy, mechanical property and thermal property of composite PP were investigated. It was found that 1%(mass fraction) modified MCM-41 could obviously improve the flame retardancy of the composite PP with a high LOI value 32.6, which is around 91.76 % higher than that of pure PP. Results of TGA, DMA and SEM showed that MCM-41 could catalyze esterification reaction between IFR, increase the char residue and form much denser char- layer to improve the retardant performance of the materials.

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Available abstract

The mesoporous material MCM-41 was modified by DOPO in order to improve its effectiveness as a synergist agent for fire retardant composite. Ammonium polyphosphate(APP)-pentaerythritol(PER)- melamine(MEL) as flame retardants and modified MCM- 41 as synergist agent were used to fabricate intumescent flame retardant(IFR)-polypropylene(PP). The synergist effect of modified MCM-41 and IFR on flame retardancy, mechanical property and thermal property of composite PP were investigated. It was found that 1%(mass fraction) modified MCM-41 could obviously improve the flame retardancy of the composite PP with a high LOI value 32.6, which is around 91.76 % higher than that of pure PP. Results of TGA, DMA and SEM showed that MCM-41 could catalyze esterification reaction between IFR, increase the char residue and form much denser char- layer to improve the retardant performance of the materials.

Key concepts: Intumescent, Ammonium polyphosphate, Fire retardant, Materials science, Char, Pentaerythritol, Melamine, Composite number

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