Macromolecules,
Год журнала:
2025,
Номер
58(8), С. 3898 - 3905
Опубликована: Апрель 11, 2025
Ring-opening
metathesis
polymerization
(ROMP)
has
been
widely
used
for
the
synthesis
of
functional
polymers.
However,
most
ROMP-derived
polymers
are
nondepolymerizable,
limiting
their
sustainability
and
eco-friendiness.
While
recent
advances
in
designing
low-strain
cyclic
olefin
monomers
have
enabled
ROMP
depolymerizable
polyolefins,
scope
these
remains
limited
due
to
narrow
range
ring
strain
energies
(RSEs
=
4.7-5.4
kcal/mol)
required
allow
both
depolymerization
a
closed-loop
recycling
process.
Herein,
we
present
new
class
chemically
recyclable
polyolefins
based
on
cycloheptene
derivatives
with
RSEs
ranging
from
3.8
7.2
kcal/mol.
The
wide
establishment
structure-polymerizability-depolymerizability
relationship,
shedding
light
role
RSE
depolymerization.
A
group
transformation
(FGT)
strategy,
harnessing
reversible
ketone-to-acetal
chemistry,
was
developed
overcome
low
polymerizability
moderate
depolymerizability
made
moderate-strain
monomers.
This
FGT
approach
not
only
enhanced
chemical
moderately
but
also
provided
access
highly
that
challenging
synthesize
through
direct
ultralow
Moreover,
thermal
properties
this
study
tunable,
broad
glass
transition
temperatures
(-7
104
°C),
highlighting
potential
various
applications.
European Polymer Journal,
Год журнала:
2024,
Номер
211, С. 113001 - 113001
Опубликована: Март 30, 2024
Atom
transfer
radical
polymerization
(ATRP)
is
one
of
the
most
often
used
controlled
techniques.
It
employs
very
small
amounts
(ppm)
Cu
complexes
in
presence
various
chemical
reducing
agents
but
also
external
stimuli
such
as
light,
electrical
current
or
mechanical
forces.
can
be
carried
out
bulk,
solution,
and
dispersed
media.
ATRP
has
been
successfully
to
prepare
polymers
with
architecture
well-defined
topology,
composition,
functionality,
well
bioconjugates
organic–inorganic
hybrids.
This
article
summarizes
status
an
outlook
for
ATRP.
Science,
Год журнала:
2025,
Номер
387(6736), С. 874 - 880
Опубликована: Фев. 20, 2025
The
reversion
of
vinyl
polymers
with
carbon-carbon
backbones
to
their
monomers
represents
an
ideal
path
alleviate
the
growing
plastic
waste
stream.
However,
depolymerizing
such
stable
materials
remains
a
challenge,
state-of-the-art
methods
relying
on
"designer"
that
are
neither
commercially
produced
nor
suitable
for
real-world
applications.
In
this
work,
we
report
main
chain-initiated,
visible
light-triggered
depolymerization
directly
applicable
commercial
containing
undisclosed
impurities
(e.g.,
comonomers,
additives,
or
dyes).
By
in
situ
generation
chlorine
radicals
from
solvent,
near-quantitative
(>98%)
polymethacrylates
could
be
achieved
regardless
synthetic
route
radical
ionic
polymerization),
end
group,
and
molecular
weight
(up
1.6
million
daltons).
possibility
perform
multigram-scale
depolymerizations
confer
temporal
control
renders
methodology
versatile
general
recycling.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(19), С. 9609 - 9651
Опубликована: Янв. 1, 2024
We
present
the
state-of-the-art
of
circular
polymers
based
on
monomer
and
polymer
design
reversible
ring-opening
addition
polymerization
reactions
without
involvement
other
reactants.
ACS Catalysis,
Год журнала:
2024,
Номер
14(16), С. 12437 - 12453
Опубликована: Авг. 5, 2024
Synthetic
polymers
play
an
indispensable
role
in
modern
society,
finding
applications
across
various
sectors
ranging
from
packaging,
textiles,
and
consumer
products
to
construction,
electronics,
industrial
machinery.
Commodity
plastics
are
cheap
produce,
widely
available,
versatile
meet
diverse
application
needs.
As
a
result,
millions
of
metric
tons
manufactured
annually.
However,
current
approaches
for
the
chemical
recycling
postconsumer
plastic
waste,
primarily
based
on
pyrolysis,
lag
efficiency
compared
their
production
methods.
In
recent
years,
significant
research
has
focused
developing
milder,
economically
viable
methods
commodity
plastics,
which
involves
converting
waste
back
into
monomers
or
transforming
it
other
valuable
chemicals.
This
Perspective
examines
both
cutting-edge
laboratory-scale
contributing
advancements
field
recycling.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 16, 2025
Abstract
Thin‐film
composite
(TFC)
membranes
are
considered
as
an
effective
architecture
to
achieve
selective
separation
for
various
application
scenarios.
However,
most
polymeric
layers
in
physically
contacted
with
underlying
porous
substrate,
where
the
physical
exfoliation
or
over‐swelling
of
layer
severely
shortens
usage
lifespan.
In
this
work,
a
novel
interlayer
assembly
design
is
proposed
realize
polydimethylsiloxane
(PDMS)/polyvinylidene
fluoride
(PVDF)
TFC
membrane
ultra‐interfacial
adhesion
via
UV‐triggered
covalent
attachment.
Especially,
by
overcoming
chemical
inertness
PVDF,
synthetic
methacrylate‐functionalized
PVDF
substrate
rapidly
copolymerized
PDMS
layer.
It
shows
that
critical
load
failure
56.92
mN
applied
nano‐scratch,
59%
higher
than
pristine
one
and
also
being
highest
interfacial
strength
among
reported
state‐of‐the‐art
ones.
The
resulting
excellent
pervaporation
performance
phenol
one,
stable
running
average
factor
7.3
flux
3142
g
m
−2
h
−1
under
extreme
conditions
(e.g.,
high
concentration
20
wt.%
temperature
80
°C).
This
chemically
bonded
principle
provides
scalable
approach
develop
ultra‐stable
efficient‐separation
adaptable
purposes.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(33)
Опубликована: Май 27, 2024
The
chemically
inert
nature
of
fully
saturated
hydrocarbon
backbones
endows
vinyl
polymers
with
desirable
durability,
but
it
also
leads
to
their
significant
environmental
persistence.
Enhancing
the
sustainability
these
materials
requires
a
pivotal
yet
challenging
shift:
transforming
backbone
into
one
that
is
degradable.
Here,
we
present
versatile
platform
for
mechanochemically
editing
towards
degradable
polymer
chains
by
integrating
cyclobutene-fused
succinimide
(CBS)
units
along
through
photo-iniferter
reversible
addition-fragmentation
chain-transfer
(RAFT)
copolymerization.
Significantly,
evenly
insertion
CBS
does
not
compromise
thermal
or
chemical
stability
rather
offers
means
adjust
properties
polymethylacrylate
(PMA).
Meanwhile,
reactive
acyclic
imide
can
be
selectively
introduced
mechanochemical
activation
(pulse
ultrasonication
ball-milling
grinding)
when
required.
Subsequent
hydrolysis
groups
enables
efficient
degradation,
yielding
telechelic
oligomers.
This
approach
holds
promise
inspiring
design
and
modification
more
environmentally
friendly
editing.
ACS Macro Letters,
Год журнала:
2024,
Номер
13(7), С. 806 - 811
Опубликована: Июнь 10, 2024
Thermal
solution
depolymerization
is
a
promising
low-temperature
chemical
recycling
strategy
enabling
high
monomer
recovery
from
polymers
made
by
controlled
radical
polymerization.
However,
current
methodologies
predominantly
focus
on
the
of
monofunctional
polymers,
limiting
material
scope
and
pathways.
Herein,
we
report
telechelic
synthesized
RAFT
Notably,
observed
significant
decrease
in
molecular
weight
(Mn)
during
recovery,
which
contrasts
minimal
Mn
shift
polymers.
Introducing
Z
groups
at
center
or
both
ends
polymer
resulted
distinct
kinetic
profiles,
indicating
partial
bifunctional
as
supported
mathematical
modeling.
Remarkably,
featuring
R-terminal
showed
up
to
68%
improvement
overall
conversion
compared
their
analogues,
highlighting
potential
these
materials
circular
economy.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(28), С. 18848 - 18854
Опубликована: Июль 3, 2024
While
oxygen-tolerant
strategies
have
been
overwhelmingly
developed
for
controlled
radical
polymerizations,
the
low
concentrations
typically
required
high
monomer
recovery
render
solution
depolymerizations
particularly
challenging.
Here,
an
open-air
atom
transfer
polymerization
(ATRP)
depolymerization
is
presented,
whereby
a
small
amount
of
volatile
cosolvent
introduced
as
means
to
thoroughly
remove
oxygen.
Ultrafast
(i.e.,
2
min)
could
efficiently
proceed
in
open
vessel,
allowing
very
retrieval
be
achieved
∼91%
efficiency),
on
par
with
that
fully
deoxygenated
analogue.
Oxygen
probe
studies
combined
detailed
kinetics
revealed
importance
low-boiling
point
removing
oxygen
prior
reaction,
thus
facilitating
effective
depolymerization.
The
versatility
methodology
was
demonstrated
by
performing
reactions
range
different
ligands
and
at
polymer
loadings
(1
M
repeat
unit
concentration)
without
significantly
compromising
yield.
This
approach
provides
oxygen-tolerant,
facile,
efficient
route
chemically
recycle
ATRP-synthesized
polymers,
enabling
exciting
new
applications.
