Influence of melt behaviour on the flame retardant properties of ethylene copolymers modified with calcium carbonate and silicone elastomer
Journal article, 2009

This work describes a halogen-free flame retardant material consisting of a polar ethylene copolymer, calcium carbonate and silicone elastomer. The flame retardant properties when using poly(ethylene-comethacrylic acid) (EMAA) and poly(ethylene-co-butyl acrylate) (EBA) as the copolymer have been compared. Rheological measurements showed an increase in complex viscosity above 250 C due to ionomer formation between acidic groups in the polymer and calcium ions. The increase in viscosity occurs at lower temperatures with the EMAA material and the increase is stronger. This has great impact on the fire performance, as shown with cone calorimetry and dripping test. In order to further elucidate the flame retardant mechanism in detail, thermogravimetric analysis and infrared spectroscopy have been used. The influence of the amount of comonomer and melt flow ratio of the polymer is also commented.

Calcium carbonate



Melt behaviour

Flame retardant



Linus Karlsson

Chalmers, Chemical and Biological Engineering, Polymer Technology

Anna Lundgren

Thomas Hjertberg

Chalmers, Chemical and Biological Engineering, Polymer Technology

Polymer Degradation and Stability

0141-3910 (ISSN)

Vol. 94 4 527-532

Subject Categories

Polymer Chemistry

Materials Chemistry



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