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Optimization of the Mechanical Properties of Polyolefin Composites Loaded with Mineral Fillers for Flame Retardant Cables

1
Istituto per i Processi Chimico-Fisici, National Research Council (CNR-IPCF), Via Giuseppe Moruzzi 1, 56124 Pisa, Italy
2
Ipool Srl, Spin-Off Company of National Council of Research Institute (CNR), Via Enrico Fermi 75, 51100 Pistoia, Italy
3
Department of Chemistry and Industrial Chemistry, University of Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy
4
Centro per l’Integrazione della Strumentazione dell’Università di Pisa (CISUP), Lungarno Pacinotti 43, 56126 Pisa, Italy
*
Authors to whom correspondence should be addressed.
Academic Editor: Carlo Santulli
Received: 8 June 2021 / Revised: 19 July 2021 / Accepted: 26 July 2021 / Published: 29 July 2021
(This article belongs to the Section Microscale Materials Science)
Formulations based on mineral fillers and polymeric matrices of different nature were studied to obtain halogen-free flame retardant compounds (HFFR) for cable applications. The work was carried out by comparing fire-retardant mineral fillers of natural origin with synthetic mineral ones available on the market. As a reference, a formulation based on micronized natural magnesium hydroxide (n-MDH, obtained from brucite) and an ethylene-vinyl acetate copolymer with 28% by weight (11% by moles) of vinyl acetate were selected, and the mechanical and flame retardant properties compared with formulations based on secondary polymers combined with EVA, metal hydroxides, and carbonates. Notably, we found a synergistic effect in the mechanical, rheological and flame retardant properties for the composite containing a mixture of n-MDH and boehmite in a 3:1 weight ratio. Overall, the present work provided a complete and optimized recipe for the formulation of polymer composites characterized by the required flame retardant and mechanical features in electric cables applications. View Full-Text
Keywords: halogen-free flame-retardant (HFFR) composites; natural magnesium hydroxide (n-MDH); synthetic magnesium hydroxide (s-MDH); poly (ethylene-co-vinyl acetate) (EVA); ultra-low density polyethylene functionalized whit maleic anhydride (ULDPE-g-MAH); poly (ethylene-co-α-olefin); mechanical properties; LOI halogen-free flame-retardant (HFFR) composites; natural magnesium hydroxide (n-MDH); synthetic magnesium hydroxide (s-MDH); poly (ethylene-co-vinyl acetate) (EVA); ultra-low density polyethylene functionalized whit maleic anhydride (ULDPE-g-MAH); poly (ethylene-co-α-olefin); mechanical properties; LOI
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MDPI and ACS Style

Haveriku, S.; Meucci, M.; Badalassi, M.; Cardelli, C.; Ruggeri, G.; Pucci, A. Optimization of the Mechanical Properties of Polyolefin Composites Loaded with Mineral Fillers for Flame Retardant Cables. Micro 2021, 1, 102-119. https://0-doi-org.brum.beds.ac.uk/10.3390/micro1010008

AMA Style

Haveriku S, Meucci M, Badalassi M, Cardelli C, Ruggeri G, Pucci A. Optimization of the Mechanical Properties of Polyolefin Composites Loaded with Mineral Fillers for Flame Retardant Cables. Micro. 2021; 1(1):102-119. https://0-doi-org.brum.beds.ac.uk/10.3390/micro1010008

Chicago/Turabian Style

Haveriku, Sara, Michela Meucci, Marco Badalassi, Camillo Cardelli, Giacomo Ruggeri, and Andrea Pucci. 2021. "Optimization of the Mechanical Properties of Polyolefin Composites Loaded with Mineral Fillers for Flame Retardant Cables" Micro 1, no. 1: 102-119. https://0-doi-org.brum.beds.ac.uk/10.3390/micro1010008

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