Arabian Journal of Chemistry,
Год журнала:
2023,
Номер
17(2), С. 105574 - 105574
Опубликована: Дек. 21, 2023
A
mixed
nitrate
ester
propellant
composed
of
nitrocellulose,
nitroglycerin,
triethylene
glycol
dinitrate,
and
dendrimer
DP-2
was
studied
to
explore
the
effects
on
rheological
properties
during
solventless
extrusion
process.
The
results
showed
that
apparent
shear
viscosity
decreased
gradually
with
increased
mass
fraction
from
0
wt%
2
wt%.
Additionally,
it
evident
inclusion
0.5
leads
a
notable
decrease
in
both
torque
screw
by
over
50%.
However,
contrast
change
fluidity
observed
wt%,
enhancement
trend
becomes
less
significant
as
content
continues
increase.
thermal
properties,
chemical
stability,
mechanical
sensitivity,
property,
combustion
behavior
were
comprehensively
assessed.
demonstrated
exhibited
promising
potential
flow
modification
additive
for
manufacture
Materials,
Год журнала:
2024,
Номер
17(7), С. 1623 - 1623
Опубликована: Апрель 2, 2024
Nanothermites
and
high-energy
explosives
have
significantly
improved
the
performance
of
composites
broad
application
prospects.
Therefore,
in
this
study,
RDX/F2311/Fe2O3/Al
composite
hollow
microspheres
were
successfully
prepared
utilizing
electrospray
method
using
F2311
as
a
binder
between
components.
The
results
show
that
combustion
time
is
shortened
from
2400
ms
to
950
ms,
process
more
stable,
energy
release
concentrated.
H50
increased
14.49
cm
24.57
cm,
explosion
percentage
decreased
84%
72%,
sensitivity
samples
significantly.
This
mainly
result
combination
homogeneous
composition
synergistic
reactions.
affects
tightness
contact
By
adjusting
its
content,
intensity
can
be
adjusted,
which
provides
feasible
direction
for
practical
application.
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(13), С. 5527 - 5541
Опубликована: Март 19, 2024
High
energy,
high
strength,
and
stable
combustion
character
are
the
basic
requirements
of
a
modern
gun
propellant
(GP).
Herein,
graphene
nanosheets
(GNSs)
introduced
into
nitroguanidine
(NQ-GP)
as
reinforcements
to
modify
its
comprehensive
performance.
A
series
in-depth
characterizations
were
conducted
characterize
structure
composition
propellant,
demonstrating
that
GNSs
integrated
well
in
system.
The
result
mechanical
properties
manifested
anti-impact
strength
increased
with
increase
content
low
0.5%
GP
exerted
better
than
those
under
different
temperature
conditions;
brickwork
bridging
effect
enhancement
mechanism
was
proposed
well.
Besides,
thermal
decomposition
investigated
heating
conditions
like
programmed
pressure.
It
revealed
can
produce
catalytic
on
process
heat
release.
Additionally,
analysis
kinetics
by
method
Friedman
demonstrated
addition
proper
could
further
enhance
activation
energy
NQ-GP
stability,
which
is
opposite
linear
fitting
methods
Kissinger
Ozawa.
results
obtained
likely
vary
action
mechanisms
systems
or
stages.
also
high-pressure
GNS
contents
obvious
influence
behavior
such
Tp
Moreover,
it
found
introduction
would
not
burning
stability
rate
coefficient
(a)
pressure
exponent
(n)
be
modified
GNSs.
Hence,
work
presented
herein
highly
broadens
application
scope
reinforcement
nanofiller
will
potential
value
community
development
high-energy
high-strength
GPs.
New Journal of Chemistry,
Год журнала:
2024,
Номер
48(13), С. 5840 - 5858
Опубликована: Янв. 1, 2024
The
gas
products
for
the
thermal
decomposition
process
of
BTA·H
2
O
were
analyzed
using
TG-DSC-FTIR.
removal
crystal
water
in
molecule
and
mechanism
BTA
also
was
investigated
a
series
analyses.
Journal of Physics Conference Series,
Год журнала:
2025,
Номер
3009(1), С. 012087 - 012087
Опубликована: Май 1, 2025
Abstract
Aiming
at
the
problem
of
difference
between
combustion
performance
propellant
obtained
according
to
current
processing
method
and
actual
situation,
a
one-dimensional
cylindrical
wall
axisymmetric
unsteady
heat
transfer
model
for
burning
in
closed
vessel
has
been
established.
By
utilizing
original
pressure-time
curve
from
experiments,
dissipation
corresponding
pressure
drop
were
calculated
was
corrected
during
process.
The
curves
used
investigate
impact
corrections
on
single-based
propellants
under
various
loading
densities
test
temperatures.
Compared
with
result
without
correction,
maximum
rate
(0.12
g·cm
−3
,
20°C)
increased
by
7.08%
6.40%
respectively
after
considering
correction.
