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.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(17), P. 2488 - 2488
Published: Aug. 31, 2024
Agricultural
mulching
is
an
important
input
for
modern
agricultural
production
and
plays
role
in
guaranteeing
food
security
worldwide.
At
present,
polyethylene
(PE)
still
commonly
used
most
countries
around
the
world,
which
non-biodegradable,
years
of
have
caused
serious
white
pollution.
Lignin
one
three
major
components
plant
cell
walls,
it
also
main
renewable
natural
aromatic
compounds
nature.
Lignin-based
composite
film
materials
are
green,
biodegradable,
show
good
prospects
development
field
mulch.
This
paper
introduces
types,
structure,
application
status
lignin,
summarizes
preparation
lignin-based
its
latest
research
progress,
focuses
on
methods,
examples
mulching,
looks
forward
to
future
mulching.
Fuel Processing Technology,
Journal Year:
2024,
Volume and Issue:
261, P. 108102 - 108102
Published: July 4, 2024
The
limited
solubility
of
lignin
in
commonly
used
solvents
poses
a
challenge
for
its
depolymerization
into
high-value
monomers.
This
paper
investigates
the
alkali
water,
methanol,
ethanol,
acetone,
1,4-dioxane,
and
their
binary
solution,
examines
impact
on
depolymerization.
distribution
products
was
correlated
with
chemical
structure
changes
various
solvent.
Among
tested,
water-acetone
mixtures
demonstrated
exceptional
(95.24%)
provide
highest
yield
bio-oil
phenolic
enhanced
guaiacol
units
combined
addition
water
co-solvent
system
dramatically
improved
lignin.
Moreover,
formic
acid
donated
hydrogen
protons
to
facilitate
prevented
repolymerization
unstable
intermediates.
Optimal
reaction
conditions
were
achieved
at
300
°C
120
mins
using
mixed
solvent
composed
ratio
5:5:1
(v/v/v),
corresponding
81.45
wt%,
lowest
residue
6.20
monomer
content
57.48%.
Furthermore,
this
revealed
satisfactory
adaptability
converting
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(23), P. 10809 - 10809
Published: Nov. 22, 2024
Plasticulture
is
a
technique
widely
affirmed
throughout
Europe
and
the
rest
of
world
that
employs
plastic
material
for
protecting
agricultural
cultivations,
e.g.,
soil
mulching,
low/middle
tunnel
covering,
greenhouse
farming.
Because
their
effects
on
sustainability
production,
these
materials
present
serious
environmental
drawbacks.
Even
if
recycling
consolidated
technical
solution,
several
obstacles
hinder
mechanical
film
used
in
plasticulture.
Mostly,
degradation
its
characteristics,
due
to
aging
simultaneous
contamination
with
agrochemicals
fighting
plant
disease
ensuring
crop
health,
plays
major
hampering
role.
In
paper,
results
laboratory
tests
PE-LD
artificially
aged
different
lengths
time
treated
two
(fungicide
anti-aphid),
are
presented.
The
resulted
considerable
reduction
properties
usage
phase
even
samples
underwent
twofold
spraying,
slower
degradative
kinetics
were
observed.
conclusion,
based
also
measured
changes
Carbonyl
Index
value,
it
doubtful
this
would
be
included
process.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(9), P. 5316 - 5330
Published: April 22, 2024
Rubber
toughening
of
poly(lactic
acid),
PLA,
particularly
with
biobased
natural
rubber
(NR)
to
address
its
inherent
brittleness,
is
always
at
the
cost
reducing
stiffness
and
tensile
strength.
In
this
work,
reactive
core–shell
particles
(RCS
particles)
NR
occluded
rigid
polystyrene
(PS)
nanodomains
inside
surface-grafted
glycidyl
methacrylate-methyl
methacrylate
copolymer
(GMA-co-MMA)
were
designed
successfully
synthesized
via
a
two-step
seeded
emulsion
polymerization
technique
balance
toughness
PLA/NR
blends.
Incorporation
RCS
resulted
in
significant
improvement
impact
PLA.
The
maximum
strength
365
J/m
(28-fold
increment
relative
PLA)
was
achieved
for
PLA/RCS
80/20
blend,
while
preserved
86%
decrement
Young's
modulus
less
than
20%,
representative
notable
"stiffness–toughness
balance"
these
systems.
This
substantial
increase
ascribed
high
level
interfacial
adhesion
between
PLA
matrix
consequently
activation
different
micromechanisms,
massive
shear
yielding
entire
matrix.
On
other
hand,
both
retained
elastic
attributed
inclusion
PS
within
particles.
innovative
strategy,
which
effectively
achieves
high-performance
biodegradable
plastics
based
on
represents
advancement
production
alternatives
engineering
plastics,
especially
use
automotive
applications.
