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Communication Dans Un Congrès Année : 2023

Modified halloysite nanotubes (HNT) used as part of a flame retardant system for a LLDPE/EVA blend

A. Taguet
Amandine Viretto
Rodolphe Sonnier
Euphrasie Jasinski
  • Fonction : Auteur
Véronique Bounor-Legaré
Emmanuel Beyou
Thierry Auvray
  • Fonction : Auteur
Franck Gyppaz
  • Fonction : Auteur

Résumé

Cable industry is continuously improving the mechanical, electrical and fire properties of their sheaths in order to keep competitive. For building applications, flexibility is a big issue while keeping good fire properties. The objective of the present project, funded by the French National Research Agency (ANR), aims at dispersing modified HNT into LLDPE/EVA blend to improve mechanical and ageing properties with appropriate fire behavior. HNT, a tubular aluminosilicate clay, has gain much attention thanks to its numerous interesting properties. Especially, its tubular shape allows to encapsulate different molecules into the lumen (internal diameter of 10-20 nm) for several applications: anticorrosion, antimicrobial, drugs, flame-retardant, microcrack self-healing. Especially, lumen can contain encapsulated molecules to be used as a flame retardant system (in combination with other additives) in polymer blends. Hence, the objectives of the project are: (1) to encapsulate molecules into the lumen that can play the role of a flame retardant system for LLDPE/EVA, (2) to functionalize the inner and/or outer surface of the HNT to selectively disperse it either in LLDPE or in EVA, in order to see the influence of the selective dispersion in mechanical and fire properties. This presentation will firstly explains how native HNT thermally degrade EVA copolymers during the melt mixing process. The second objective of the presentation is to explain how 3-aminopropyltriethoxysilane modified halloysite nanotubes are selectively dispersed into the LLDPE/EVA blend. Finally, the mechanical and fire properties of different LLDPE/EVA/HNT blend nanocomposites are compared.

Domaines

Matériaux
Fichier non déposé

Dates et versions

hal-04172496 , version 1 (27-07-2023)

Identifiants

  • HAL Id : hal-04172496 , version 1

Citer

A. Taguet, Amandine Viretto, Belkacem Otazaghine, Rodolphe Sonnier, Euphrasie Jasinski, et al.. Modified halloysite nanotubes (HNT) used as part of a flame retardant system for a LLDPE/EVA blend. PPS 38 - The 38th International Conference of the Polymer Processing Society, May 2023, St Gallen, Switzerland. ⟨hal-04172496⟩
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