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Open AccessFeature PaperArticle

Improving Mechanical Properties and Reaction to Fire of EVA/LLDPE Blends for Cable Applications with Melamine Triazine and Bentonite Clay

1
CIATEC, Asociación Civil, Omega 201, Colonia Industrial Delta, León 37545, Gto., Mexico
2
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad de México 04510, Mexico
3
Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
4
Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino-Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy
*
Author to whom correspondence should be addressed.
Materials 2019, 12(15), 2393; https://doi.org/10.3390/ma12152393
Received: 21 June 2019 / Revised: 17 July 2019 / Accepted: 24 July 2019 / Published: 26 July 2019
(This article belongs to the Special Issue Advanced Flame Retardant Materials)
The high flame-retardant loading required for ethylene-vinyl acetate copolymer blends with polyethylene (EVA-PE) employed for insulation and sheathing of electric cables represents a significant limitation in processability and final mechanical properties. In this work, melamine triazine (TRZ) and modified bentonite clay have been investigated in combination with aluminum trihydroxide (ATH) for the production of EVA-PE composites with excellent fire safety and improved mechanical properties. Optimized formulations with only 120 parts per hundred resin (phr) of ATH can achieve self-extinguishing behavior according to the UL94 classification (V0 rating), as well as reduced combustion kinetics and smoke production. Mechanical property evaluation shows reduced stiffness and improved elongation at break with respect to commonly employed EVA-PE/ATH composites. The reduction in filler content also provides improved processability and cost reductions. The results presented here allow for a viable and halogen-free strategy for the preparation of high performing EVA-PE composites. View Full-Text
Keywords: EVA/LLDPE blend; flame retardant; wire and cable; melamine triazine; clay EVA/LLDPE blend; flame retardant; wire and cable; melamine triazine; clay
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Sanchez-Olivares, G.; Sanchez-Solis, A.; Manero, O.; Pérez-Chávez, R.; Jaramillo, M.; Alongi, J.; Carosio, F. Improving Mechanical Properties and Reaction to Fire of EVA/LLDPE Blends for Cable Applications with Melamine Triazine and Bentonite Clay. Materials 2019, 12, 2393.

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