Polyethylene Materials with Tunable Degradability by Incorporating In-Chain Mechanophores
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(34), P. 24024 - 24032
Published: Aug. 17, 2024
Polyolefins
are
recognized
as
fundamental
plastic
materials
that
manufactured
in
the
largest
quantities
among
all
synthetic
polymers.
The
chemical
inertness
of
saturated
hydrocarbon
chains
is
crucial
for
storing
and
using
polyolefin
plastics,
but
poses
significant
environmental
challenges
related
to
pollution.
Here,
we
report
a
versatile
approach
creating
polyethylene
with
tunable
degradability
by
incorporating
in-chain
mechanophores.
Through
palladium-catalyzed
coordination/insertion
copolymerization
ethylene
cyclobutene-fused
comonomers,
several
cyclobutane-fused
mechanophores
were
successfully
incorporated
varied
insertion
ratios
(0.35-26
mol
%).
resulting
exhibit
both
high
thermal
stability
remarkable
acid
resistance.
Upon
mechanochemical
activation
ultrasonication
or
ball-milling,
degradable
functional
units
(imide
ester
groups)
introduced
into
main
polymer
chain.
synergy
hydrolysis
facilitates
efficient
degradation
molecular
weight
telechelic
oligomers.
Language: Английский
Harnessing Non-Thermal External Stimuli for Polymer Recycling
Macromolecules,
Journal Year:
2025,
Volume and Issue:
58(5), P. 2210 - 2223
Published: Feb. 18, 2025
Polymeric
materials
have
become
indispensable
due
to
their
versatility
and
low
cost,
yet
environmental
impact
presents
a
significant
global
challenge.
Traditional
chemical
recycling
methods
typically
rely
on
heat
as
stimulus;
for
instance,
pyrolysis
is
popular
methodology
which
faces
limitations
high
energy
consumption,
product
selectivity,
the
generation
of
undesirable
byproducts.
In
response,
recent
advances
in
promotion
depolymerization
degradation
through
alternative
stimuli
such
light,
electrochemistry,
mechanical
force,
shown
promising
potential
more
efficient
selective
polymer
breakdown,
yielding
either
starting
monomers
or
valuable
small
molecules.
This
perspective
explores
key
examples
these
emerging
strategies,
highlighting
improve
upon
current
protocols
offer
pathways
under
milder
conditions,
while
identifying
challenges
that
future
research
must
address
translate
chemistry
into
viable
broadly
applicable
strategies.
Language: Английский
Backbone Degradable Polymers via Chain-growth Radical Polymerization
Chinese Journal of Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 24, 2025
Language: Английский
Accessing Degradable Polyethylene Materials with In-chain Ester Units via Mechanochemical Backbone Editing
Chinese Journal of Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 24, 2025
Language: Английский
Influence of Crystallinity on the Mechanochemical Degradation of Poly(lactide) with Ball-Mill Grinding
Macromolecules,
Journal Year:
2024,
Volume and Issue:
57(21), P. 9960 - 9964
Published: Oct. 29, 2024
Polymers
can
undergo
mechanochemical
chain
scission
during
ball-mill
grinding
(BMG).
Various
milling
and
polymer
parameters
were
known
to
influence
scission,
but
the
of
crystallinity
was
not
fully
explored.
In
this
report,
using
ring-opening
polymerization,
we
prepared
a
library
poly(lactide)s
(PLAs)
with
varying
molecular
weight
by
changing
stereochemistry
monomers.
Semicrystalline
PLLA
PDLA
(from
l-
d-lactide,
respectively),
amorphous
PLDLA
copolymerization
d-lactide),
stereocomplex
between
subjected
degradation
experiments
assess
their
kinetics.
We
found
rate
constant
trends
that
suggested
had
negligible
on
rates.
attributed
behavior
fast
amorphization
semicrystalline
PLAs.
This
work
provides
important
insight
into
how
other
transformations
occur
ball
scission.
Language: Английский
Photo-Iniferter RAFT Synthesis of Versatile, Nonalternating Poly(acrylate-co-isocyanides)
Lejla Čamdžić,
No information about this author
Erin E. Stache
No information about this author
Macromolecules,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 28, 2024
Language: Английский
Polymer Degradation via a Mechanochemical Gating Strategy
X. H. Liang,
No information about this author
Hai Qian
No information about this author
Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 20, 2024
Abstract
The
extensive
use
of
plastics,
valued
for
their
lightweight,
durability,
and
cost‐effectiveness,
has
led
to
severe
environmental
pollution,
with
72%
plastic
waste
ending
up
in
landfills
or
natural
habitats.
Traditional
methods
decomposition,
including
both
mechanical
chemical
approaches,
often
face
challenges
such
as
incomplete
degradation
stability
concerns.
innovative
concept
gating
presents
a
promising
solution
by
incorporating
mechanophores
into
polymer
structures,
enabling
controlled
degradation.
Recent
advancements
have
focused
on
utilizing
mechanophores,
cyclobutane,
"door
locks"
regulate
the
process.
This
perspective
highlights
recent
progress
this
field,
demonstrating
potential
mechanophore‐based
strategies
achieving
on‐demand
It
addresses
limitations
conventional
recycling
explores
how
approach
can
balance
degradability,
paving
way
more
sustainable
management
solutions.
Early
Day
Record
Language: Английский