Chemical Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
This
Feature
Article
reviews
recent
advances
in
green
chemistry
and
outlines
strategic
pathways
to
scale
sustainable
technologies—such
as
non-conventional
activations
solvents—from
research
innovation
industrial
applications.
Polymer Engineering and Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 14, 2025
Abstract
This
study
investigates
the
effect
of
incorporating
recycled
polymethyl
methacrylate
(r‐PMMA)
into
polylactic
acid
(PLA)
and
further
modifications
with
a
bio‐based
compatibilizer
(epoxidized
soybean
oil
[ESO]).
Various
PLA:r‐PMMA
ratios
were
evaluated,
without
ESO.
Blending
r‐PMMA
PLA
significantly
influenced
mechanical
properties.
The
10PLA90r‐PMMA
blend
showed
enhanced
elongation
at
break
(6.10%)
tensile
toughness
(1686
kJ/m
3
)
compared
to
pure
(3.34%
737
,
respectively),
addressing
PLA's
inherent
brittleness.
30PLA70r‐PMMA
composition
exhibited
strength
(TS)
51.44
MPa
significant
(1237
).
Thermal
analysis
revealed
an
increase
in
glass
transition
temperature
(
T
g
higher
content,
reaching
124°C
for
100r‐PMMA,
decrease
crystallinity
percentage
from
68.17%
(pure
PLA)
30.43%
(50PLA50r‐PMMA).
Incorporating
ESO
50
PLA50r‐PMMA
modified
its
Adding
parts
per
hundred
resins
(phr)
improved
(5.68%)
(1302
while
reducing
TS
(35.03
MPa).
At
6
phr
ESO,
flexibility
was
maximized
6.37%,
but
decreased
26.89
MPa.
These
findings
highlight
synergy
between
enhancing
performance
sustainable
applications
balancing
thermal
properties
environmental
challenges.
Highlights
enhances
&
blends.
Pure
has
crystallinity;
lowers
it
50PLA50r‐PMMA.
High
content
erases
melting
peaks,
indicating
minimal
crystallinity.
boosts
crystallization;
50PLA50r‐PMMA
increases
31.72%.
promotes
sustainability
via
waste
reuse
eco‐friendly
materials.
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 23, 2025
ABSTRACT
This
study
explores
enhancing
polylactic
acid
(PLA)
by
blending
it
with
recycled
polycarbonate
(r‐PC)
to
improve
its
brittleness
and
thermal
limitations.
Recycled
r‐PC,
obtained
from
compact
discs,
was
mixed
PLA
in
varying
ratios
(100:0
0:100),
using
epoxidized
soybean
oil
(ESO)
a
chain
extender
(CE)
as
bio‐based
compatibilizers.
Scanning
electron
microscopy
revealed
smoother
fracture
surfaces
ESO,
indicating
improved
compatibility.
Mechanical
testing
showed
significant
toughness
enhancement,
the
30PLA70r‐PC
blend
reaching
8725
kJ/m
3
—nearly
ten
times
that
of
pure
PLA.
ESO
raised
tensile
strength
47.39
MPa
52.57
MPa,
while
CE
increased
elongation
at
break
32.14%.
Differential
scanning
calorimetry
indicated
reduced
crystallinity,
dropping
68.17%
10.32%
increasing
r‐PC.
A
new
transition
225°C
ESO‐rich
blends
suggested
enhanced
molecular
interactions.
X‐ray
diffraction
shift
toward
an
amorphous
structure
higher
r‐PC
contents.
Dynamic
mechanical
analysis
stability,
glass
temperature
rising
61°C
141°C
r‐PC‐rich
blends.
These
findings
demonstrate
combining
biodegradable
produces
high‐performance,
sustainable
composites
suitable
for
circular
economy
applications.
Chemical Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Progress
in
chemical
recycling
of
waste
polyesters
(waste
plastic
refinery)
was
reviewed
and
prospected,
newly
reported
thermal
catalysis,
photocatalysis,
electrocatalysis,
biocatalysis
the
recycle
PET-based
product
were
introduced.
Traditional
chemical
recycling
approaches
for
condensation
polymers
suffer
compounding
energy
losses
and
CO2
emissions
across
multiple
polymerization
depolymerization
cycles.
Entropic
can
address
these
by
entrapping
free
within
the
deconstruction
products.
involves
to
macrocyclic
monomers,
but
such
processes
have
not
been
feasible
due
high
dilutions
typically
required
generate
compounds.
Here,
we
leverage
selective
catalysis
allow
entropic
at
concentrations
20–2000×
higher
than
typical
macrocyclization
reactions.
We
find
that
Ru-based
olefin
metathesis
catalysts
containing
bulky
iodine
ligands
significantly
bias
ring–chain
kinetic
product
distribution
during
ring-closing
(RCM)
toward
formation
of
oligomeric
cycloalkenes.
Further
improvements
in
reaction
concentration
macrocycle
yield
are
obtained
using
catalyst
loadings
predisposing
alkene
substrates
undergo
favorable
macrocyclization.
These
RCM
optimizations
translate
effectively
cyclodepolymerization
(CDP)
an
olefin-containing
polymer,
with
CDP
affording
similar
distributions
under
identical
conditions.
Macrocycle
entropy-driven
ring-opening
provides
much
molecular
weight
linear
analogues,
reducing
time
achieve
from
hours
minutes
enabling
room
temperature.
Our
findings
re-emphasize
importance
consumption
a
polymer's
lifecycle
provide
framework
design
efficient
systems.
Clean Technologies,
Год журнала:
2025,
Номер
7(1), С. 20 - 20
Опубликована: Март 5, 2025
Plastic
waste
poses
a
significant
challenge
in
Africa
and
around
the
world,
with
its
volume
continuing
to
increase
at
an
alarming
rate.
In
Africa,
estimated
25–33%
of
daily
is
made
up
plastic,
posing
threat
environment,
marine
life,
human
health.
One
potential
solution
this
problem
waste-to-energy
recycling,
such
as
pyrolysis,
which
involves
conversion
materials
into
oil,
char,
non-condensable
gasses
through
thermochemical
process
absence
oxygen.
Given
abundance
continent’s
energy
challenges,
pyrolysis
offers
sustainable
solution.
This
review
delves
concept
products,
thermodynamics,
endothermic
kinetics,
presenting
it
promising
way
address
plastic
Africa.
Despite
African
Union’s
goal
recycle
waste,
continent
faces
barriers
achieving
target,
including
infrastructural,
economic,
social
difficulties.
It
crucial
implement
strategies
for
managing
mitigate
environmental
degradation
promote
cleaner
healthier
living
environment.
Pyrolysis
technology
highlighted
viable
management,
can
convert
valuable
byproducts
syngas.
Case
studies
from
countries
like
South
Nigeria
demonstrate
scaling
management
issues
while
generating
job
opportunities.
underscores
need
investment,
regulatory
support,
public
awareness
overcome
challenges
unlock
full
Embracing
method
could
lead
economic
benefits
continent.
Recycling,
Год журнала:
2025,
Номер
10(2), С. 41 - 41
Опубликована: Март 11, 2025
The
accumulation
of
plastic
waste
poses
a
significant
environmental
challenge,
necessitating
sustainable
solutions.
This
study
investigates
the
potential
recycling
plastics
for
use
in
construction
industry,
emphasizing
their
integration
into
building
materials
and
components.
Earlier
was
excessively
studied
as
an
ingredient
concrete
composites,
roads,
other
research.
However,
this
study,
recycled
is
assessed
sole
material
structural
products.
Raw
plastics,
including
high-density
polyethylene,
Low-Density
Polyethylene,
polypropylene,
polyolefin,
samicanite,
virgin
were
analyzed
through
mechanical
extrusion,
properties
to
determine
feasibility
applications.
In
extrusion
process,
combined
with
engineered
dyes,
investigated
comprehensive
testing
per
ASTM
standards
obtain
desired
construction.
Advanced
characterization
techniques,
SEM,
FTIR,
TGA,
employed
evaluate
chemical
composition,
thermal
stability,
impurities
these
collected
from
municipal
waste.
A
gas
emission
analysis
during
confirmed
minimal
impact,
validating
sustainability
process.
Municipal
has
considerable
quantum
HDPE,
PP,
LDPE,
which
considered
research
total
140
samples
tested
across
shear,
flexural,
tensile,
compression
categories:
35
each.
results
showed
that
rHDPE
PP
had
good
tensile
strength
shear
resistance.
findings
pave
way
developing
cost-effective,
durable,
eco-friendly
materials,
such
rebars,
corrugated
sheet,
blocks,
products,
contributing
conservation
resource
efficiency
Industry.