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Open AccessArticle

Halogen-Free Flame-Retardant Compounds. Thermal Decomposition and Flammability Behavior for Alternative Polyethylene Grades

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Center for Advanced Materials (CAM), Qatar University, P.O. Box 2713, Doha, Qatar
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Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, Zographou Campus, 157 80 Athens, Greece
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Fraunhofer Institute for Structural Durability and System Reliability LBF, Schlossgartenstr. 6, 64289 Darmstadt, Germany
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(9), 1479; https://doi.org/10.3390/polym11091479
Received: 30 July 2019 / Revised: 30 August 2019 / Accepted: 30 August 2019 / Published: 10 September 2019
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. View Full-Text
Keywords: halogen-free flame retardants; low-density polyethylene; linear low-density polyethylene; intumescence; thermal decomposition; flammability; Kissinger model; Coats-Redfern model halogen-free flame retardants; low-density polyethylene; linear low-density polyethylene; intumescence; thermal decomposition; flammability; Kissinger model; Coats-Redfern model
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Luyt, A.S.; Malik, S.S.; Gasmi, S.A.; Porfyris, A.; Andronopoulou, A.; Korres, D.; Vouyiouka, S.; Grosshauser, M.; Pfaendner, R.; Brüll, R.; Papaspyrides, C. Halogen-Free Flame-Retardant Compounds. Thermal Decomposition and Flammability Behavior for Alternative Polyethylene Grades. Polymers 2019, 11, 1479.

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