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Open AccessArticle

Thermal Degradation and Combustion Behaviors of Polyethylene/Alumina Trihydrate/Graphene Nanoplatelets

1
School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
2
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technolog, Harbin 150080, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(5), 772; https://doi.org/10.3390/polym11050772
Received: 10 April 2019 / Revised: 25 April 2019 / Accepted: 25 April 2019 / Published: 1 May 2019
(This article belongs to the Special Issue Applications of Graphene and Fullerene Nanocomposites)
Graphene nanoplatelets (GNPs) were prepared from expanded graphite (EG) with fully exfoliated structure via ball milling coupled with ultrasonication. The structure of multi-layered GNPs was characterized with transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM) and Raman spectroscopy. By compounding alumina trihydrate (ATH) with GNPs, the well dispersed mixture of ATH/GNP was obtained, and it showed high flame retardant effectiveness in polyethylene (PE). The peak heat release rate (peak-HRR) decreased by 20% was proven by a cone calorimeter with the addition of GNPs as low as 0.2 wt % in PE/ATH. The results of thermogravimetric analysis (TG) illustrated the improved thermal stability and lower weight loss rate of PE/ATH/GNP than PE/ATH. A protective char with GNPs was evidenced by SEM and X-ray photoelectron spectroscopy (XPS). The well exfoliated structure and good dispersion of GNPs accounted for the formation of effective barrier, which made a profound contribution to the enhanced flame retardancy. View Full-Text
Keywords: graphene nanoplatelets; polyethylene; alumina trihydrate; flame retardancy; cone calorimeter graphene nanoplatelets; polyethylene; alumina trihydrate; flame retardancy; cone calorimeter
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MDPI and ACS Style

Wang, C.; Wang, J.; Men, Z.; Wang, Y.; Han, Z. Thermal Degradation and Combustion Behaviors of Polyethylene/Alumina Trihydrate/Graphene Nanoplatelets. Polymers 2019, 11, 772.

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