Influence of modified polyethylene compatibilizer on filler dispersion and flammability characteristics of linear low density polyethylene/cyclo olefin copolymer blends containing flame retardant combinations

S. Sánchez-Valdes*, A. G. Zapata-Domínguez, A. Z. Graciano-Verdugo, L. F. Ramos de Valle, A. Morales-Cepeda, E. Ramírez-Vargas, O. S. Rodríguez-Fernandez, T. Lozano-Ramírez, S. Flores-Gallardo, A. B. Espinoza-Martinez, J. Méndez-Nonell, P. G. Lafleur, Shahir Karami

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In this study, the combination of organomodified montmorillonite (MMT), magnesium hydroxide (MDH), graphene oxide (GO) and expandable graphite (EG) as intumescent flame retardant for Linear Low-Density Polyethylene-Cyclo-Olefin Copolymer (LLDPE/COC) blends has been investigated. An amine-alcohol modified polyethylene (PEgDMAE) was used as compatibilizer. Limiting oxygen index (LOI), cone calorimeter determinations and flammability test (Underwriters Laboratory–UL-94) were used to evaluate the flame retardant properties. The structural characterization was measured by FTIR and scanning electron microscopy (SEM). The mechanical properties were also evaluated by Dynamic-mechanical analysis (DMA). The PEgDMAE compatibilizer enhanced the filler dispersion and increased the LOI to 22% for clay, 23% for GO and 26.5% for EG composites. The results indicated that the combination of each additive makes it possible to reduce the total Magnesium hydroxide filler content from 55 to 20% to achieve the flame retardant requirements. The flame retardant and mechanical properties of LLDPE/COC blends increased to a higher extent when using the combination of these additive fillers.

Original languageEnglish
Pages (from-to)1560-1577
Number of pages18
JournalJournal of Adhesion Science and Technology
Volume32
Issue number14
DOIs
StatePublished - 18 Jul 2018

Bibliographical note

Publisher Copyright:
© 2018 Informa UK Limited, trading as Taylor & Francis Group.

Keywords

  • Flame retardancy
  • LLDPE/COC blends
  • aluminium hydroxide
  • expandable graphite
  • graphene oxide
  • montmorillonite

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