Materials,
Год журнала:
2024,
Номер
17(23), С. 5875 - 5875
Опубликована: Ноя. 29, 2024
The
increasing
complexity
and
production
volume
of
glass-fiber-reinforced
polymers
(GFRP)
present
significant
recycling
challenges.
This
paper
explores
a
potential
use
for
mechanically
recycled
GFRP
by
blending
it
with
high-density
polyethylene
(HDPE).
composite
could
be
applied
in
products
such
as
terrace
boards,
pipes,
or
fence
posts,
substitute
filler
wood
flour
chalk.
Recycled
from
post-consumer
bus
bumpers
were
ground
then
combined
HDPE
twin-screw
extruder
at
concentrations
10,
20,
30,
40
wt%.
study
examined
the
mechanical
structural
properties
resulting
composites,
including
effects
aging
re-extrusion.
modulus
elasticity
increased
0.878
GPa
pure
rHDPE
to
1.806
composites
wt%
GFRP,
while
tensile
strength
ranged
36.5
MPa
28.7
MPa.
Additionally,
porosity
linearly
2.65%
7.44%
10
respectively.
Aging
re-extrusion
improved
properties,
reaching
34.1
MPa,
attributed
reduction
nearly
half,
3.43%.
Polymers,
Год журнала:
2025,
Номер
17(2), С. 193 - 193
Опубликована: Янв. 14, 2025
This
research
addresses
the
study
of
combined
effect
two
abiotic
treatments,
a
thermo-oxidative
treatment
followed
by
photo-oxidative
with
ultraviolet
light,
on
physicochemical
properties
commercially
available
low-density
polyethylene
films
an
oxo-degradant
additive
(OXOLDPE)
and
without
(LDPE).
The
change
in
oxidized
film
was
characterized
using
FTIR,
XRD,
TGA,
GPC,
SEM
analytical
techniques.
results
indicated
that
increment
carbonyl
index
(CI)
crystallinity
percentage
(XXRD)
higher
for
those
received
oxidative
treatments
compared
only
one
them,
thermo-
or
treatment.
Moreover,
produced
more
ester
carboxylic
groups
degradation
products
than
other
single
treatments.
An
analysis
variance
(ANOVA)
carried
out,
synergistic
observed
between
both
products.
TGA
revealed
loss
thermal
stability
significant
after
their
exposure
to
which
one.
GPC
showed
is
necessary
decrease
Mz
Mz+1
average
molecular
weight
degraded
containing
same
extent
as
MW
Mn.
surface
appearance
changed
drastically
they
seemed
erode
presence
inorganic
fillers
(CaCO3).
These
suggest
lower
greater
content
should
enhance
its
environmental
biodegradability.
Recycling,
Год журнала:
2025,
Номер
10(2), С. 45 - 45
Опубликована: Март 13, 2025
This
study
explores
the
development
of
sustainable
fire-resistant
composites
using
a
blend
recycled
linear
low-density
polyethylene
(rLLDPE)
and
(rLDPE)
for
construction
applications.
The
incorporation
non-halogenated
intumescent
flame
retardants
(IFRs),
specifically
ammonium
polyphosphate
(APP)
melamine
(MPP),
was
shown
to
enhance
retardance,
thermal
stability,
mechanical
performance
these
polymer
blends.
IFRs
were
introduced
at
5
wt.%
10
concentrations,
their
effects
evaluated
limiting
oxygen
index
(LOI)
testing
thermogravimetric
analysis
(TGA).
Results
showed
that
APP
combination
with
MPP
increased
LOI
values
from
18.5%
(neat
blend)
21.2%
22.4%,
respectively,
demonstrating
improved
fire
resistance.
Enhanced
char
formation,
facilitated
by
IFRs,
contributes
superior
stability
protection.
TGA
results
confirmed
higher
yields,
rLLDPE/rLDPE/MPP5/APP5
composition
exhibiting
highest
residue
(3.00%),
indicating
synergistic
effect
between
MPP.
Rheological
had
more
impact
on
viscoelastic
behavior,
while
provided
balanced
properties
despite
slight
reduction
in
tensile
strength.
research
highlights
potential
promoting
circular
economy
principles
developing
sustainable,
materials
industry,
reducing
plastic
waste,
enhancing
safety
polymer-based
