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Effect of ultrafine zinc borate on the smoke suppression and toxicity reduction of a low-density polyethylene/intumescent flame-retardant system

Authors

  • Zhiping Wu,

    Corresponding author
    1. School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
    • School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
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  • Yunchu Hu,

    1. School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
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  • Wanyin Shu

    1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
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Abstract

The production of smoke, carbon monoxide (CO), and carbon dioxide (CO2) were investigated with cone calorimetry testing when low-density polyethylene (LDPE), LDPE treated with an intumescent flame retardant (IFR), and LDPE treated with an IFR and ultrafine zinc borate (UZB) combusted under irradiation. The results of the testing showed that UZB could depress smoke production and reduce the amount of CO and CO2. The components of the pyrolytic gas and its contents were identified and measured with pyrolysis–gas chromatography/mass spectrometry (Py–GC–MS) when LDPE, LDPE/IFR, and LDPE/IFR/UZB were pyrolyzed at 400°C for 20 s. The Py–GC–MS results implied that UZB had an important influence on the components and contents of the pyrolytic gas of LDPE/IFR. UZB mechanisms of smoke suppression and toxicity reduction with respect to LDPE/IFR are proposed. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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