Talcs and brominated trimethylphenyl indane/Sb2O3 blend in a PP-PE copolymer

Add time:08/04/2019    Source:sciencedirect.com

Several fillers containing various percentages of talc were incorporated at 40% loading, and at 20% in combination with 20% of a brominated flame retardant system in a PP-PE copolymer. Fire resistance and mechanical properties were studied. Ignition time at dripping test, UL 94 behaviour, and tensile yield stress are improved by the use of fillers with high percentages in talc, low median diameter and high lamellarity index. These correlations are interpreted by the crystallisation ability of talc which creates a strong filler-polymer adhesion. The melting of this crystalline phase around the filler is expected to protect the filled material when a heat source is applied. Mixed compositions with micronic and quite pure talc exhibit V0 class at the UL 94 test and interesting tensile and flexural mechanical properties.

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