The influence of surface modification for EG, the content and the particle size of EG on the properties of HDPE/EG composite were studied by the tests of tensile strength, notched impact strength, horizontal/vertical combustion and oxygen index of the composite. The results showed that the mechanical properties and flame retardant properties of HDPE/EG composite are both improved after treating the surface of EG with coupling agent, and the mechanical properties and flame retardant properties of HDPE/EG composite after treating the surface of EG with silane coupling agent (KH-550) is better than that with titanate coupling agent (NDZ-201). With the increase of the proportion of EG, the mechanical properties of the composite were reduced while the flame retardant performance was improved. And with the increase of the particle size of EG, the mechanical properties of HDPE/EG composite decreased, and the flame retardant properties improved.

Topics
Materials properties, Mechanical properties, Polymers, Carbon based materials, Silicon compounds, Chemical elements, Inorganic compounds, Educational assessment
1.
Liang
 
Wenhu
. Influence of screw configurations on PPO/PA66 alloy [D].
Beijing University of Chemical Technology
,
2012
.
2.
Cai
 
Chujiang
,
Shen
 
Zhigang
,
Ma
 
Shulin
, et al 
Micro mechanism analysis of adsorption of silane and titanate coupling agent [C]//
 
6ᵗʰ Annual Conference of Chinese Society of Particuology cum symposium on Particle Technology across Taiwan Straits
,
2008
.
Google Scholar
 
3.
Jiang
 
Shu
. Structures and Properties of Expandable Graphite filled Polypropylene [D].
Sichuan University
,
2007
.
4.
Sun
 
Zhidan
. Effects of expandable graphite on the properties of high-density polyethylene/ethylene vinyl-acetate copolymer composite[D].
Southwest Jiaotong University
.
2014
.
5.
B.
 
Schilling
.
Expandable graphite
.
Kunstst-Plast. Eur.
 
87
(
1997
)
16
–
17
Google Scholar
 
6.
T.
 
Archibald
,
J. Fir. Safe.
,
39
,
131
(
2004
)
https://doi.org/10.1016/j.firesaf.2003.07.004
Crossref
Search ADS
 
This content is only available via PDF.
© 2019 Author(s).
2019
Author(s)