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P. Jankowski, M. Kędzierski

Polystyrene with reduced flammability containing halogen-free flame retardants (in English)

Polimery 2013, No 5, 342


DOI: dx.doi.org/10.14314/polimery.2013.342

Summary

Additives that reduce the flammability of plastics were synthesized by a modification of expandable graphite (EG) using melamine salts (phosphate or cyanurate). Polystyrene (PS) was prepared by suspension polymerization of styrene in the presence of the obtained EG/melamine salt compounds. The resulting PS composites achieved horizontal FH-1 and vertical V-0 flammability ratings in the UL-94 burning test and the limiting oxygen index values increased by over 50 % compared with non-modified polystyrene. An advantageous effect of EG/melamine salt additives on the suppression of polystyrene combustion processes was also indicated by cone calorimetry and thermogravimetric analysis.


Key words: halogen-free flame retardants, polystyrene of limited flammability, expandable graphite, melamine cyanurate, melamine phosphate

e-mail: piotr.jankowski@ichp.pl

P. Jankowski, M. Kędzierski (1.41 MB)
Polystyrene with reduced flammability containing halogen-free flame retardants (in English)