Citation

Luyt AS, Malik SS, Gasmi SA, Porfyris A, Andronopoulou A, Korres D, Vouyiouka S, Grosshauser M, Pfaendner R, Brüll R, Papaspyrides C. Polymers (Basel) 2019; 11(9): e11091479.

Affiliation

Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou Campus, 157 80 Athens, Greece. kp@cs.ntua.gr.

Copyright

(Copyright © 2019, MDPI: Multidisciplinary Digital Publications Institute)

DOI

10.3390/polym11091479

PMID

31510054

Abstract

The effect of six halogen-free flame retardant (FR) formulations was investigated on the thermal stability of two low-density polyethylenes (LDPE) and one linear low-density polyethylene (LLDPE), by means of thermogravimetric analysis (TGA) under nitrogen and air atmosphere. The relative data were combined with flammability properties and the overall performance of the FRs was correlated with the type of branching in the polyethylene grades and to their processing behavior. The thermal degradation kinetics was further determined based on the Kissinger and Coats-Redfern methods. In terms of flammability, the addition of a triazine derivative and ammonium polyphosphate at a loading of 35 wt. %. was found to be the most efficient, leading to UL 94 V0 ranking in the case of the LDPE grade produced in an autoclave reactor.

Language: en

Keywords

Coats-Redfern model; Kissinger model; flammability; halogen-free flame retardants; intumescence; linear low-density polyethylene; low-density polyethylene; thermal decomposition