4.7 Article

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

期刊

POLYMERS
卷 11, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/polym11091479

关键词

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

资金

  1. Qatar National Research Fund (Qatar Foundation) [NPRP 9-161-1-030]

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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.

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