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Effect of nanofillers on the flame retardant properties of a polyethylene-calcium carbonate-silicone elastomer system

Linus Karlsson (Institutionen för kemi- och bioteknik, Polymerteknologi) ; A. Lundgren ; J. Jungqvist ; T. Hjertberg
Fire and Materials (0308-0501). Vol. 35 (2011), 7, p. 443-452.
[Artikel, refereegranskad vetenskaplig]

This study shows the effects of three different nanofillers on the viscosity properties and fire behavior of a halogen-free flame retardant system. The original system, based on ethylene-acrylate copolymer, calcium carbonate, and a silicone elastomer, shows good flame retardant properties. One of the nanofillers, montmorillonite (MMT), significantly increases the viscosity above 250 degrees C, resulting in reduced dripping and decreased heat release rate. The ash residue, however, is very brittle, indicating poor interactions between the MMT and other components of the system. The second nanofiller, sepiolite, shows no improvement on the flame retardant properties of the system. Reduced dripping is observed when a small amount of the third nanofiller, polyhedral oligomeric silsesquioxane, POSS, is incorporated into the system. In this case, high silica content on the surface indicates char formation originating from the POSS. However, an increased heat release is observed when POSS is used in the system.

Nyckelord: flame retardant, nanofiller, viscosity, ethylene-acrylate copolymer, polymer nanocomposites, behavior, polypropylene, acrylate, chalk



Denna post skapades 2011-11-30. Senast ändrad 2016-12-05.
CPL Pubid: 149308

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Polymerteknologi (2005-2014)

Ämnesområden

Kemiteknik

Chalmers infrastruktur