Polymers,
Journal Year:
2024,
Volume and Issue:
16(4), P. 519 - 519
Published: Feb. 14, 2024
Poly(1,4-butylene
succinate)
(PBS)
is
a
promising
sustainable
and
biodegradable
synthetic
polyester.
In
this
study,
we
synthesized
PBS-based
copolyesters
by
incorporating
5–20
mol%
of
–O2CC6H4CO2–
–OCH2CH2O–
units
through
the
polycondensation
succinic
acid
(SA)
with
1,4-butanediol
(BD)
bis(2-hydroxyethyl)
terephthalate
(BHET).
Two
different
catalysts,
H3PO4
conventional
catalyst
(nBuO)4Ti,
were
used
comparatively
in
synthesis
process.
The
produced
using
former
treated
M(2-ethylhexanoate)2
(M
=
Mg,
Zn,
Mn)
to
connect
chains
ionic
interactions
between
M2+
ions
either
–CH2OP(O)(OH)O−
or
(–CH2O)2P(O)O−
groups.
By
BHET
(i.e.,
–OCH2CH2O–),
resulting
exhibited
improved
ductile
properties
enhanced
elongation
at
break,
albeit
reduced
tensile
strength.
prepared
H3PO4/M(2-ethylhexanoate)2
displayed
less
random
distribution
units,
leading
faster
crystallization
rate,
higher
Tm
value,
yield
strength
compared
those
(nBuO)4Ti
same
amount
BHET.
Furthermore,
they
substantial
shear-thinning
behavior
their
rheological
due
presence
long-chain
branches
(–CH2O)3P=O
units.
Unfortunately,
H3PO4/M(2-ethylhexanoate)2,
hence
containing
M2+,
–CH2OP(O)(OH)O−,
groups,
did
not
exhibit
biodegradability
under
ambient
soil
conditions.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(3), P. 1676 - 1691
Published: Jan. 22, 2024
Mechanical
recycling
of
plastic
waste
is
not
sustainable
and
inefficient
in
terms
the
resources
needed
to
accomplish
process,
quality
materials
obtained
from
this
technique
substandard.
Chemical
polymers
appears
be
preferable
because
technology
allows
for
production
new
materials.
This
review
compiles
most
recent
research
which
selected
transition
metals
are
used
as
catalysts
hydrogenolytic
depolymerization
polyolefins
a
polymer
upcycling
process.
Hydrogenolysis
an
emerging
chemical
method
that
uses
transition-metal
complexes
presence
hydrogen
cleave
C–C
bonds
substances
into
shorter
hydrocarbons.
Transition
such
Ruthenium
(Ru),
Platinum
(Pt),
Nickel
(Ni),
Cobalt
(Co),
Zirconium
(Zr),
Tantalum
(Ta),
Rhodium
(Rh)
have
been
utilized
recently
type
reaction.
hydrogenolysis
can
produce
valuable
hydrocarbon
products,
gas/liquid
fuels
lubricating
oils,
under
relatively
milder
operational
conditions
with
less
environmental
impact.
The
focused
on
supported
metal
organometal
catalytic
system
their
mechanism
polyolefin
pathways
detailed
investigation
impact
reaction
parameters
high
gasoline,
diesel,
light
lubricants.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
Plastic
products
bring
convenience
to
various
aspects
of
the
daily
lives
due
their
lightweight,
durability
and
versatility,
but
massive
accumulation
post‐consumer
plastic
waste
is
posing
significant
environmental
challenges.
Catalytic
methods
can
effectively
convert
into
value‐added
feedstocks,
with
catalysts
playing
an
important
role
in
regulating
yield
selectivity
products.
This
review
explores
latest
advancements
advanced
applied
thermal
catalysis,
microwave‐assisted
photocatalysis,
electrocatalysis,
enzymatic
catalysis
reaction
systems
for
chemical
recycling
valuable
feedstocks.
Specifically,
pathways
mechanisms
involved
plastics
process
are
analyzed
presented,
strengths
weaknesses
employed
across
different
described.
In
addition,
structure‐function
relationship
these
discussed.
Herein,
it
provided
insights
design
novel
outline
challenges
future
opportunities
terms
developing
tackle
“white
pollution”
crisis.
Macromolecules,
Journal Year:
2025,
Volume and Issue:
58(4), P. 1795 - 1803
Published: Feb. 7, 2025
Waste
polyesters
are
a
potential
feedstock
for
recycled
and
upcycled
products.
These
polymers
generally
semicrystalline,
which
presents
challenge
chemical
biological
recycling
to
monomers,
thus
the
thermodynamic
work
associated
with
polyester
decrystallization
is
an
important
consideration
in
some
depolymerization
strategies.
Here,
we
use
molecular
dynamics
simulations
calculate
free
energy
required
decrystallize
single
chain
from
crystal
surface
of
five
commercially
scientifically
important,
semiaromatic
(PET,
PTT,
PBT,
PEN,
PEF)
water.
Our
results
indicate
ranges
approximately
15
kcal/mol
(PEN)
8
(PEF)
per
repeat
unit
chains
middle
surface.
The
insight
gained
into
interactions
that
form
structural
basis
semicrystalline
synthetic
can
guide
pursuit
more
efficient
plastic
processing,
could
include
catalyst
development,
optimizing
conditions
including
pretreatment,
enzyme
solvent
selections,
design
new
materials.
Polymers,
Journal Year:
2025,
Volume and Issue:
17(5), P. 603 - 603
Published: Feb. 24, 2025
Plastics,
particularly
synthetic
organic
polymers,
have
become
indispensable
in
modern
life,
yet
their
large-scale
production
has
led
to
significant
environmental
challenges
due
persistent
waste.
Traditional
mechanical
recycling
methods
proven
insufficient
addressing
these
issues.
This
review
explores
recent
advancements
polymer
recycling,
focusing
on
chemical
and
biological
processes,
such
as
pyrolysis,
depolymerization,
enzyme-based
degradation,
which
offer
more
efficient
sustainable
alternatives.
Within
the
framework
of
a
circular
economy,
also
examines
strategies
like
closed-loop
plastic
economies.
These
developments
represent
critical
steps
toward
creating
practices.
The
final
chapter
includes
Quarterly
Report
2024
plastics,
providing
an
up-to-date
overview
current
state
its
trends.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
17(21)
Published: May 22, 2024
Abstract
The
efficient
utilization
of
organic
solid
waste
resources
can
help
reducing
the
consumption
conventional
fossil
fuels,
mitigating
environmental
pollution,
and
achieving
green
sustainable
development.
Due
to
its
dual
nature
being
both
a
resource
source
it
is
crucial
implement
suitable
recycling
technologies
throughout
upgrading
processes
for
plastics
biomass,
which
are
wastes
with
complex
mixture
components.
pyrolysis
hydropyrolysis
were
summarized
biomass
into
high‐value
chemicals,
materials.
To
enhance
reaction
efficiency
improve
product
selectivity,
microwave‐assisted
was
introduced
through
energy
supply
especially
aid
catalysts
microwave
absorbers.
This
review
provides
detail
summary
from
technical,
applied,
mechanistic
perspectives.
Based
on
recent
technological
advances,
future
directions
development
predicted.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(26)
Published: April 22, 2024
Catalytic
upcycling
of
polyolefins
into
high-value
chemicals
represents
the
direction
in
end-of-life
plastics
valorization,
but
poses
great
challenges.
Here,
we
report
synthesis
a
tandem
porous
catalyst
via
micelle
cascade
assembly
strategy
for
selectively
catalytic
cracking
polyethylene
olefins
at
low
temperature.
A
hierarchically
silica
layer
from
mesopore
to
macropore
is
constructed
on
surface
microporous
ZSM-5
nanosheets
through
dynamic
micelles.
The
outer
arrays
can
adsorb
bulky
quickly
by
capillary
and
hydrophobic
effects,
enhancing
diffusion
access
active
sites.
middle
mesopores
present
nanoconfinement
space,
pre-cracking
intermediates
weak
acid
sites,
which
then
transport
zeolites
micropores
further
strong
Brønsted
acidic
structures,
mimicking
biomimetic
protease
clefts,
ideally
match
steps
polyolefins,
thus
suppressing
coke
formation
facilitating
product
escape.
As
result,
light
hydrocarbons
(C
Catalysts,
Journal Year:
2024,
Volume and Issue:
14(3), P. 212 - 212
Published: March 21, 2024
Improper
disposal
of
waste
plastic
has
caused
serious
ecological
and
environmental
pollution
problems.
Transforming
plastics
into
high
value-added
chemicals
can
not
only
achieve
efficient
recycling
plastics,
but
is
also
an
effective
way
to
control
white
pollution.
The
catalyst
selectively
breaks
the
C–C
bond
polyolefin
under
heat
treatment
converts
it
liquid
fuel,
thus
realizing
sustainable
a
good
development
prospect.
This
review
provides
detailed
overview
current
catalytic
pyrolysis,
hydrolysis,
solvent
decomposition,
supercritical
hydrothermal
liquefaction
for
cracking
make
fuel
oil.
reaction
mechanism,
influencing
factors,
promoting
effects
catalysts
in
various
degradation
technologies
are
analyzed
summarized,
latest
proposed
tandem
degrading
briefly
introduced.
Finally,
some
optimization
paths
pyrolysis
oil
technology
proposed:
synergies
between
mixed
raw
materials,
in-depth
exploration
catalysts,
design
manufacture
reactors
that
match
technology.
All
these
important
research
directions
industrialization
