Influence of Flame Retardants on the Melt Dripping Behaviour of Thermoplastic Polymers

Published: 27 August 2015

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Abstract: Melt flow and dripping of the pyrolysing polymer melt can be both a benefit and a detriment during a fire. In several small-scale fire tests addressing the ignition of a defined specimen with a small ignition source, well-adjusted melt flow and dripping are usually beneficial to pass the test. The presence of flame retardants often changes the melt viscosity crucially. The influence of certain flame retardants on the dripping behaviour of four commercial polymers, poly(butylene terephthalate) (PBT), polypropylene (PP), polypropylene modified with ethylene-propylene rubber (PP-EP) and polyamide 6
(PA 6), is analysed based on an experimental monitoring of the mass loss due to melt dripping, drop size and drop temperature as a function of the furnace temperature applied to a rod-shaped specimen. Investigating the thermal transition (DSC), thermal and thermo-oxidative decomposition, as well as the viscosity of the polymer and collected drops completes the investigation. Different mechanisms of the flame retardants are associated with their influence on the dripping behaviour in the UL 94 test. Reduction in decomposition temperature and changed viscosity play a major role. A flow limit in flame-retarded PBT, enhanced decomposition of flame-retarded PP and PP-EP and the promotion of dripping in PA 6 are the salient features discussed.

Global Flame Retardant Chemicals Market Outlook (2014-2022)

The Global Market for Flame Retardant Chemicals Market is valued at $6.1 billion in 2014 and is expected to reach $14.32 billion by 2022 at a Compound Annual Growth Rate (CAGR) of 11.25%. The factors that drive the market include high demand from current & emerging applications, emerging economies and advancement in technology. Whereas increasing costs and strong government regulations are major restraints of the market. Construction and automotive industry and other major end-user industries of flame retardant chemicals are on a boom globally.

Flame Retardant Chemicals market is segmented by type, by product, by application, by end-user and by geography. Depending on the various types, market is segmented into Aluminum Hydroxide, Brominated Flame, Chlorinated and Organo Phosphorous. Based on the Products, it is segregated as Wood/Paper, Textiles, Plastics, Coatings/Paints and Decorations/Others. Based on the Applications, it is classified into Polystyrene, Polyolefins and Polyvinyl Chloride. Based on End-users, it is categorized as Acrylonitrile Butadiene Styrene, Polyethylene, Polycarbonates and Polypropylene. By geography, the market is segmented into North America, Europe, Asia-Pacific and Rest of the World. Asia-Pacific accounts the largest share in the market, followed by North-America.

The key players in the Flame Retardant Chemicals market include Akzo Nobel Polymer Chemicals LLC, Clariant AG, Martinswerk GmbH, DIC Corporation, Dover Chemical Corporation, Royal DSM NV, ICL Industrial Products, Supresta LLC, Synalloy Corporation and The Dow Chemical Company. Read more: click here


Fire Resistance in Plastics 2015

Trends and technical developments in the international flame retardant industry

8 -10 December 2015
Cologne, German

Conference Programme: click here

First International Conference on ECO- riendly F lame Retardant Additives and Materials (ECOFRAM)

Call for abstract

Materia Nova and Fire reaction thematic group of Société Chimique de France are pleased to announce that the first International Conference on ECO-friendly Flame Retardant Additives and Materials (ECOFRAM) will take place in Mons, Belgium on the 16th & 17th March 2016.

This conference will bring together international scientific and industrial experts as well as researchers to discuss and exchange their experiences. Over the two days, the conference will bring you insights into state of the art as well as the latest development of basic and applied research concerning the development of eco-friendly flame retardant additives and materials.
Key Topics Include:

  • Sustainable flame retardant additives
  • Bio-based FR additives & polymers
  • Life cycle analysis of Flame retardant products
  • Aging of flame retardant polymers
  • Toxicity and environmental issues

Invited Speakers:

– Prof. Giovanni Camino : Politecnico di Torino, Alessandria, Italie
– Prof. Richard Hull : University of Central Lancashire, Preston, UK
– Dr. De-Yi Wang : IMDEA Material Science, Madrid, Spain

Contact :


Tel :

Dr. Dorothée Coevoet

Tel :

more information: click here

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