Polymers,
Journal Year:
2024,
Volume and Issue:
16(22), P. 3169 - 3169
Published: Nov. 14, 2024
Contributing
to
a
sustainable
economy
requires
the
use
of
pure
recycled
materials.
Analyzing
polyolefin
post-consumer
materials
and
cross-contaminations
in
these
is
an
essential
part
ensuring
consistent
product
quality.
Therefore,
aim
this
work
was
quantify
linear
low-density
polyethylene
(LLDPE)
content
polypropylene
(PP)-dominant
strips.
The
investigated
included
virgin
PP,
custom
PP-LLDPE
blends
PP
recyclates.
To
end,
differential
scanning
calorimetry
(DSC)
parallel-plate
rheometry
were
used.
For
complementary
measurements,
Raman
spectroscopy
atomic
force
microscopy
(AFM)
employed,
confirming
morphological
occurrence
LLDPE
enclosed
up
30
wt%.
DSC
measurements
demonstrated
that
evaluated
specific
melt
recrystallization
enthalpies
alone
are
insufficient
content,
especially
at
1–10
rheometric
results
showed
strong
correlation
between
cross-over
point
(COP)
zero-shear
viscosity
for
grades,
there
deviation
from
depending
on
blends.
An
approach
determining
low
(1–15
wt%)
medium
(up
quantities
via
two
mathematical
models
proposed
based
can
be
applied
assess
level
contamination
Film
blowing
is
a
crucial
plastic
conversion
technique
for
(Linear)
Low
Density
Polyethylene
((L)LDPE),
widely
employed
in
the
industry.However,
understanding
its
complexities,
which
involve
delicate
interplay
between
various
parameters,
such
as
macromolecular
features,
flow
behavior,
processing
conditions,
and
final
film
performance,
remains
limited
literature.Notably,
quantification
of
processability
has
not
yet
been
adequately
addressed.Present
study
investigates
key
parameters
this
interplay,
introduces
framework
to
quantify
processability,
establishes
connection
with
molecular
weight
(distribution)
extensional
behavior
(L)LDPE.Additionally,
selected
conditions
are
correlated
crystalline
morphology
performance
films.The
findings
research
offer
fundamental
process
serve
valuable
baseline
future
endeavors
involving
more
complicated
polymer
systems,
blends
contaminated
recyclates.By
shedding
light
on
their
interdependencies,
work
contributes
advancing
efficiency
quality
process,
facilitating
production
high-performance
films.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(18), P. 2631 - 2631
Published: Sept. 18, 2024
The
need
for
ending
plastic
waste
and
creating
a
circular
economy
has
prompted
significant
interest
in
developing
new
family
of
composite
materials
through
recycling
recovery
resources
(including
bio-sourced
materials).
In
this
work,
natural
fiber-reinforced
composites
been
developed
from
paint
pail
recycled
polypropylene
(rPP)
wool
fibers
different
diameter
aspect
ratio.
Composites
were
fabricated
by
melt
processing
using
polypropylene-graft-maleic
anhydride
as
compatibilizer.
internal
morphology,
interfacial
thermal
characteristics,
viscoelastic
behavior,
water
sorption/wettability,
mechanical
properties
studied
electron
microscopy,
high-resolution
synchrotron
Fourier
transform
infrared
microspectroscopy,
analysis,
rheology,
immersion
test,
contact
angle
measurement,
tensile
test
flexural
test.
matrix
exhibited
an
morphology
coalescent
micro-droplets
due
to
the
presence
polyethylene
dry
rPP
phase.
general,
rheological
comprising
higher-aspect-ratio
(lower
diameter)
relatively
superior
performance.
About
18%
increase
strength
39%
measured
with
optimal
fiber
loading
10
wt.%.
Interfacial
debonding
pull-out
observed
main
failure
mechanism
composites.
have
potential
applications
automotive,
decking,
building
industries.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(22), P. 3169 - 3169
Published: Nov. 14, 2024
Contributing
to
a
sustainable
economy
requires
the
use
of
pure
recycled
materials.
Analyzing
polyolefin
post-consumer
materials
and
cross-contaminations
in
these
is
an
essential
part
ensuring
consistent
product
quality.
Therefore,
aim
this
work
was
quantify
linear
low-density
polyethylene
(LLDPE)
content
polypropylene
(PP)-dominant
strips.
The
investigated
included
virgin
PP,
custom
PP-LLDPE
blends
PP
recyclates.
To
end,
differential
scanning
calorimetry
(DSC)
parallel-plate
rheometry
were
used.
For
complementary
measurements,
Raman
spectroscopy
atomic
force
microscopy
(AFM)
employed,
confirming
morphological
occurrence
LLDPE
enclosed
up
30
wt%.
DSC
measurements
demonstrated
that
evaluated
specific
melt
recrystallization
enthalpies
alone
are
insufficient
content,
especially
at
1–10
rheometric
results
showed
strong
correlation
between
cross-over
point
(COP)
zero-shear
viscosity
for
grades,
there
deviation
from
depending
on
blends.
An
approach
determining
low
(1–15
wt%)
medium
(up
quantities
via
two
mathematical
models
proposed
based
can
be
applied
assess
level
contamination
