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.
Molecules,
Journal Year:
2024,
Volume and Issue:
30(1), P. 87 - 87
Published: Dec. 29, 2024
This
paper
highlights
the
complexity
and
urgency
of
addressing
plastic
pollution,
drawing
attention
to
environmental
challenges
posed
by
improperly
discarded
plastics.
Petroleum-based
polymers,
with
their
remarkable
range
physical
properties,
have
revolutionized
industries
worldwide.
Their
versatility—from
flexible
rigid
hydrophilic
hydrophobic—has
fueled
an
ever-growing
demand.
However,
versatility
has
also
contributed
a
massive
global
waste
problem
as
plastics
pervade
virtually
every
ecosystem,
from
depths
oceans
most
remote
terrestrial
landscapes.
Plastic
pollution
manifests
not
just
visible
waste—such
fishing
nets,
bottles,
garbage
bags—but
microplastics,
infiltrating
food
chains
freshwater
sources.
crisis
is
exacerbated
unsustainable
linear
model
production
consumption,
which
prioritizes
convenience
over
long-term
health.
The
mismanagement
only
pollutes
ecosystems
but
releases
greenhouse
gases
like
carbon
dioxide
during
degradation
incineration,
thereby
complicating
efforts
achieve
climate
sustainability
goals.
Given
that
mechanical
recycling
addresses
fraction
macroplastics,
innovative
approaches
are
needed
improve
this
process.
Methods
pyrolysis
hydrogenolysis
offer
promising
solutions
enabling
chemical
transformation
depolymerization
into
reusable
materials
or
valuable
feedstocks.
These
advanced
methods
can
support
circular
economy
reducing
creating
high-value
products.
In
article,
focus
on
underscores
need
move
beyond
traditional
recycling.
exemplify
potential
for
science
technology
mitigate
while
aligning
objectives.
Recent
advances
in
polyolefins
recycling,
breaking
down
at
molecular
level
create
feedstocks
new
products
fuels.
Pyrolysis
produces
oil
syngas,
applications
renewable
energy
chemicals.
some
process
include
scalability,
feedstock
variety,
standardization,
well
concerns
about
emissions.
Companies
Shell
ExxonMobil
investing
heavily
overcome
these
barriers
efficiencies.
By
leveraging
transformative
strategies,
we
reimagine
lifecycle
address
one
pressing
our
time.
review
updates
knowledge
fields
derived
based
recent
works
available
literature,
highlighting
techniques
used,
types
obtained,
highest
yields.
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.
