Thermal and Combustion Behaviors of Aluminum/ Manganese Dioxide/
Fluoroelastomer Terpolymer Nanothermite
Jiaxing Song*a,b, Fei Duan*b, Jialin
Chenc, Guannan Wangd, Quanwei
Tiana and Jingkai Fenga
a Xi’an Rare Metal Materials Research Institute Co.,
Ltd., Xi’an, 710016, China
b School of Mechanical and Aerospace Engineering,
Nanyang Technological University, 639789, Singapore
c Institute of Defense Engineering, AMS, PLA, Beijing,
100036, China
d Xi’an Aerospace Propulsion Institute, Xi’an, 710100,
China.
Corresponding author: sjx1407@126.com (Jiaxing Song); feiduan@ntu.edu.sg
(Fei Duan).
Abstract : Fluoroelastomer has received increasing attention for
energetic materials application due to its high fluorine contents.
Different contents of poly(VDF-ter-HFP- ter- TFE) terpolymer are added
into Al/MnO2 nanothermite. The peak exothermic
temperature of thermite reaction for Al/MnO2 system is
about 554 oC with 1070 Jg-1 heat
release. After adding terpolymer, it mainly exists in the gap among Al
nanoparticles and MnO2 nanorods, and can react with Al
and MnO2 at the range of 350 oC to 540oC before the occurrence of thermite reaction. 10wt%
terpolymer has relatively little effect on the thermite reaction, and
for the samples with higher terpolymer content, more nanothermite
components reacts with terpolymer at early stage. Ignition and
combustion performance show terpolymer can reduce ignition energy
threshold by up to 9.82% and increase combustion duration time at least
several times. The potential reasons for above results are analyzed.
This work can shed light on application of fluoroelastomer in
energetic-materials.
Keywords : fluoroelastomer; nanothermite; thermal analysis;
combustion behaviors