Propellants Explosives Pyrotechnics,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 28, 2024
ABSTRACT
The
thermal
decomposition
analysis
of
nitrocellulose–nitroglycerine
(NC–NG),
3,4‐dinitrofurazanfuroxan
(DNTF),
and
their
mixed
system
with
differential
scanning
calorimetry
(DSC),
thermogravimetric
analysis‐DSC–mass
spectroscopy–Fourier
transform
infrared
spectroscopy
(TG–DSC–MS–FTIR)
coupling
technique,
in
situ
FTIR
experiments
under
different
experimental
conditions
was
carried
out
for
the
investigation
interaction
mechanism
between
NC–NG
DNTF.
results
demonstrated
that
mixture
significantly
decreased
peak
temperature
DNTF,
activation
energy
final
(156.32
kJ
mol
−1
)
lower
than
both
(163.82
DNTF
(177.03
).
On
basis
gas
fragmental
products
condensed
phase
changes,
triggered
thermally
process,
resulting
intensive
amount
nitrogen
oxides
which
further
caused
breakage
nitro
groups
Propellants Explosives Pyrotechnics,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 22, 2025
ABSTRACT
As
a
strong
oxidizer,
ammonium
perchlorate
(AP)
is
one
of
the
most
paramount
raw
materials
in
composite
solid
propellants
(CSP)
formulations,
and
thermal
decomposition
features
AP
would
directly
impact
energy
release
impulsion
performance
CSP.
CuNCN
as
an
example
metal
carbodiimides
explored
burn
rate
modifier
for
decomposition,
given
their
oxide
counterpart
belonging
to
typical
modifiers.
Our
results
reveal
that
as‐prepared
can
effectively
accelerate
AP.
The
additive
mixture
reduce
activation
bring
down
HTD
by
84°C.
present
study
highlights
on
effective
application
thermally
enhanced
Defence Technology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 1, 2024
The
present
work
aims
to
stabilize
the
room
temperature
allotropic
transition
of
ammonium
nitrate
(AN)
particles
utilizing
a
microencapsulation
technique,
which
involves
solvent/non-solvent
in
nitrocellulose
(NC)
has
been
employed
as
coating
agent.
SEM
micrographs
revealed
distinct
features
both
pure
AN
and
NC,
contrasting
with
irregular
granular
surface
topography
coated
particles,
demonstrating
adherence
NC
on
surface.
Structural
analysis
via
infrared
spectroscopy
(IR)
demonstrated
successful
association
slight
shifts
observed
IR
bands
indicating
interfacial
interactions.
Powder
X-ray
Diffraction
(PXRD)
further
elucidated
structural
changes
induced
by
process,
revealing
that
altered
crystallization
pattern
its
form.
Thermal
demonstrates
profiles
for
AN,
sample
exhibits
increase
an
enthalpy
decrease
6
°C,
36%,
respectively.
Furthermore,
presence
alters
intermolecular
forces
within
composite
system,
leading
reduction
melting
∼39%
compared
AN.
thermal
decomposition
shows
two-step
thermolysis
process
significant
released
heat
about
78%
accompanied
activation
barrier
thermolysis,
stabilized
reactivity
AN-NC
particles.
These
findings
highlight
synergistic
effect
contributed
reactive
stabilization
proving
potential
application
NC-coated
strategically
advantageous
oxidizer
solid
propellant
formulations.
Dalton Transactions,
Journal Year:
2024,
Volume and Issue:
53(8), P. 3765 - 3776
Published: Jan. 1, 2024
Four
salophen
complexes
were
prepared
using
the
spiral
gas–solid
two-phase
flow
(S-GSF)
technique
and
applied
to
catalyze
AP,
reducing
high-temperature
decomposition
peak
of
AP
its
activation
energy.
Defence Technology,
Journal Year:
2024,
Volume and Issue:
38, P. 1 - 15
Published: April 16, 2024
In
the
pursuit
of
advancing
imidazolium-based
energetic
ionic
liquids
(EILs),
current
study
is
devoted
to
synthesis
and
characterization
1,3-dibutyl-imidazolium
azide
([BBIm][N3]),
as
a
novel
member
in
this
class.
The
chemical
structure
EIL
was
rigorously
characterized
confirmed
using
FTIR
spectroscopy,
1D,
2D-NMR
analyses.
thermal
behavior
assessment
conducted
through
DSC
TGA
experiments.
analysis
revealed
an
endothermic
glass
transition
at
Tg=-61
°C,
followed
by
exothermic
degradation
event
Tonset=311
°C.
Similarly,
thermograms
exhibited
one-stage
decomposition
process
resulting
100%
mass
loss
sample.
Furthermore,
short-term
stability
investigated
combining
non-isothermal
data
with
TAS,
it-KAS,
VYA/CE
isoconversional
kinetic
approaches.
Consequently,
Arrhenius
parameters
(Ea=154
kJ∙mol-1,
Log(A/s-1))=11.8)
most
probable
reaction
model
g(α)
were
determined.
observed
high
temperatures
significantly
elevated
activation
energy
affirm
enhanced
modified
EIL.
These
findings
that
[BBIm][N3]
can
be
promising
candidate
for
advanced
material
application.
