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Durability of the flame retardance of ethylene‐vinyl acetate copolymer cables: Comparing different flame retardants exposed to different weathering conditions
Author(s) -
Tan Yi,
Wachtendorf Volker,
Klack Patrick,
Kukofka Tobias,
Ruder Jörg,
Schartel Bernhard
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47548
Subject(s) - cone calorimeter , fire retardant , materials science , ethylene vinyl acetate , durability , vinyl acetate , composite material , ammonium polyphosphate , accelerated aging , copolymer , intumescent , humidity , chemical engineering , polymer , pyrolysis , char , engineering , physics , thermodynamics
ABSTRACT Scientific publications addressing the durability of the flame retardance of cables during their long‐term application are rare and our understanding lacks. Three commercial flame retardants, aluminum hydroxide, aluminum diethyl phosphinate (AlPi‐Et), and intumescent flame retardant based on ammonium polyphosphate, applied in ethylene‐vinyl acetate copolymer (EVA) model cables, are investigated. Different artificial aging scenarios were applied: accelerated weathering (UV‐irradiation/temperature/rain phases), humidity exposure (elevated temperature/humidity), and salt spray exposure. The deterioration of cables' surface and flame retardancy were monitored through imaging, color measurements, attenuated total reflectance Fourier transform infrared spectroscopy, and cone calorimeter investigations. Significant degradation of the materials' surface occurred. The flame retardant EVA cables are most sensitive to humidity exposure; the cable with AlPi‐Et is the most sensitive to the artificial aging scenarios. Nevertheless, substantial flame retardance persisted after being subjected for 2000 h, which indicates that the equivalent influence of natural exposure is limited for several years, but less so for long‐term use. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 47548.