Polymer Engineering and Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 19, 2025
Abstract
In
the
present
study,
mechanical
properties
and
thermal
degradation
kinetics
of
PVA/PVP/PEO
(polyvinyl
alcohol/polyvinyl
pyrrolidone/polyethylene
oxide)
blend,
along
with
their
composites
containing
various
percentages
boron
carbide
(B
4
C),
are
examined.
The
solvent‐casting
method
is
used
for
preparing
composites.
Thermal
analyzed
using
both
Kissinger
FWO
(Flynn‐Wall‐Ozawa)
methods
to
determine
activation
energies
(
E
a
).
varied
B
C
content,
higher
leading
increased
stability.
Dynamic
analysis
(DMA)
was
employed
evaluate
properties,
revealing
that
addition
enhances
Young's
modulus
)
while
decreasing
strain.
highest
strain
ε
observed
in
PVA/PEO/PVP
reaching
184%.
values
PVA/PEO/PVP‐B
%5
,
%10
%20
were
determined
as
45.30%,
29.15%,
16.48%,
respectively.
measured
0.12
MPa
PVA/PEO/PVP,
value
0.64
PVA/PVP/PEO‐B
20%
composite.
Additionally,
chemometric
FTIR
data
clustering
algorithms
confirmed
homogeneity
blends.
These
findings
indicate
C‐reinforced
could
serve
alternatives
conventional
polymers,
particularly
applications
requiring
enhanced
Highlights
increases
stability
blend.
DMA
shows
elastic
modulus.
Activation
calculated
by
methods.
offer
superior
resistance.
Crystals,
Год журнала:
2023,
Номер
13(1), С. 135 - 135
Опубликована: Янв. 12, 2023
In
this
work,
new
samples
of
PVA-TiO2/Cu
nanocomposites
were
prepared
via
the
casting
method.
The
examined
using
different
analytical
methods.
An
XRD
analysis
showed
semi-crystalline
nature
PVA
polymer,
as
well
showing
a
decrease
in
degree
crystallinity
structure
result
addition
mixed
nanoparticles.
TEM
images
indicate
spherical
shape
Cu
NPs,
with
size
ranging
from
2
to
22
nm,
and
rectangular
TiO2
5
25
nm.
It
was
evident
FTIR
measurements
that
there
interactions
between
functional
groups
TiO2/Cu
NPs.
optical
properties
improved
an
increase
content
nanoparticles,
shown
UV/Vis
analysis.
DSC
curves
improvement
thermal
stability
after
embedding
impedance
spectroscopy
AC
conductivity
by
adding
nanoparticles
polymeric
matrix.
maximum
found
at
1.60
wt.%
13.80
×
10−6
S/cm
room
temperature.
Relaxation
occurred
charge
carrier
hopping
localized
state
correlated
barriers
model,
describing
dominant
mechanism,
presented
electrical
modulus
These
results
nanocomposite
can
be
used
energy
storage
capacitor
applications
alternative
separator-rechargeable
lithium-ion
battery
industry.
Polymers,
Год журнала:
2023,
Номер
15(2), С. 384 - 384
Опубликована: Янв. 11, 2023
In
this
article,
the
synthesis,
optical,
and
electrical
properties
of
composites
consisting
polyethylene
oxide
(PEO),
carboxymethyl
cellulose
(CMC),
titanium
dioxide
nanoparticles
are
examined.
Flexible
nanocomposite
samples
comprising
PEO,
CMC,
TiO2
were
produced
swiftly
via
using
cast
synthesis
method.
addition,
XRD
FT-IR
analysis
performed
in
order
to
analyze
structures
prepared
samples.
Our
results
demonstrate
PEO/CMC
blend's
effectiveness
interacting
with
nanoparticles.
The
optical
samples,
such
as
energy
band
gap,
studied
UV/Vis
absorbance.
It
was
found
that
NP
weight
fraction
increases,
gap
narrows.
Moreover,
an
average
size
16
nm
formed
spherical
rod
shapes,
according
a
TEM
image.
SEM
images
how
distribution
NPs
increased
upon
surfaces
films.
antibacterial
activity
nanocomposites
shown
be
enhanced
by
concentrations.
Finally,
we
proposed
PEO/CMC-0.8
wt.
%
electrical,
dielectric
should
used
electrochemical
devices.
Polymer Engineering and Science,
Год журнала:
2023,
Номер
63(11), С. 3684 - 3697
Опубликована: Авг. 28, 2023
Abstract
In
the
present
work,
sol–gel‐synthesized
titanium
oxide
nanoparticles
(TiO
2
NPs)
were
added
to
polyvinyl
chloride
(PVC)
and
polymethyl
methacrylate
(PMMA)
create
polymer
nanocomposites
(PNCs)
samples.
The
preparation
was
carried
out
via
solution
casting
method.
synthesized
TiO
NPs
have
a
tetragonal
anatase
phase
an
average
grain
size
of
15.7
nm.
XRD
analysis
reveals
that
NPs'
addition
PVC/PMMA
causes
decrease
in
crystallinity
PNCs
films.
Infrared
Fourier
demonstrated
interplay/complexity
between
blend
NPs.
UV/visible
spectrum
showed
two
absorbance
peaks
at
278
208
nm,
which
may
result
from
n
→
π*
π
transitions.
Also,
optical
bandgaps
for
indirect
direct
allowed
transitions
decreased
with
increasing
concentration.
samples'
AC
electrical
conductivity
dielectric
properties
measured
room
temperature.
As
content
nanocomposite
rises,
percolating
network
begins
emerge
inside
composite,
demonstrating
obeys
Jonscher's
law.
Additionally,
it
has
been
nanoparticle
concentration
leads
higher
composite
loss
constant.
These
findings
suggest
possibility
using
prepared
capacitive
energy
storage
optoelectronic
devices.
Highlights
PVC/PMMA‐TiO
nanocomposites'
films
fabricated
Adding
reduces
rising
content.
conductivity,
impedance,
characteristics
discussed.
indicate
use
samples
