Abstract
The
transition
to
a
sustainable
future
requires
the
use
of
waste‐free
technologies
for
production.
Potentially,
additive
can
be
promising
approach
accessing
circular
economy
due
precise
amount
feeding
materials
and
absence
molds.
However,
initial
approaches
are
often
based
on
non–renewable
hydrocarbon
sources.
This
work
focused
polymers
derived
from
terpene
alcohols
develop
filament
suitable
3D
printing.
Initially,
vinylation
menthol
using
calcium
carbide
was
optimized
scaled
up,
then
series
terpenyl–based
vinyl
ethers
were
obtained
under
optimal
conditions.
cationic
polymerization
also
up
resulted
in
99
%
yield
polymers,
which
subsequently
subjected
hot
extrusion.
terpenol
used
as
an
increase
polymer
flexibility.
addition
(30
wt
%)
polyvinyl
led
filament.
Using
filament,
objects
printed
at
125
°C.
material
demonstrated
good
sinterability
adhesion
glass
shrinkage
comparable
that
commercial
printing
filaments.
Furthermore,
additives
enhance
commercially
available
Chemical Reviews,
Год журнала:
2024,
Номер
124(7), С. 4393 - 4478
Опубликована: Март 22, 2024
Polyesters
carrying
polar
main-chain
ester
linkages
exhibit
distinct
material
properties
for
diverse
applications
and
thus
play
an
important
role
in
today's
plastics
economy.
It
is
anticipated
that
they
will
even
greater
tomorrow's
circular
economy
focuses
on
sustainability,
thanks
to
the
abundant
availability
of
their
biosourced
building
blocks
presence
bonds
can
be
chemically
or
biologically
cleaved
demand
by
multiple
methods
bring
about
more
desired
end-of-life
plastic
waste
management
options.
Because
this
potential
promise,
there
have
been
intense
research
activities
directed
at
addressing
recycling,
upcycling
biodegradation
existing
legacy
polyesters,
designing
biorenewable
alternatives,
redesigning
future
polyesters
with
intrinsic
chemical
recyclability
tailored
performance
rival
commodity
are
either
petroleum
based
and/or
hard
recycle.
This
review
captures
these
exciting
recent
developments
outlines
challenges
opportunities.
Case
studies
poly(lactic
acid),
poly(3-hydroxyalkanoate)s,
poly(ethylene
terephthalate),
poly(butylene
succinate),
poly(butylene-adipate
presented,
emerging
recyclable
comprehensively
reviewed.
Chemical Reviews,
Год журнала:
2024,
Номер
124(5), С. 2617 - 2650
Опубликована: Фев. 22, 2024
The
societal
importance
of
plastics
contrasts
with
the
carelessness
which
they
are
disposed.
Their
superlative
properties
lead
to
economic
and
environmental
efficiency,
but
linearity
puts
climate,
human
health,
global
ecosystems
at
risk.
Recycling
is
fundamental
transitioning
this
linear
model
into
a
more
sustainable,
circular
economy.
Among
recycling
technologies,
chemical
depolymerization
offers
route
virgin
quality
recycled
plastics,
especially
when
valorizing
complex
waste
streams
poorly
served
by
mechanical
methods.
However,
exists
in
interlinked
system
end-of-life
fates,
complementarity
each
approach
key
environmental,
economic,
sustainability.
This
review
explores
recent
progress
made
five
commercial
polymers:
poly(ethylene
terephthalate),
polycarbonates,
polyamides,
aliphatic
polyesters,
polyurethanes.
Attention
paid
not
only
catalytic
technologies
used
enhance
efficiencies
also
interrelationship
other
systemic
constraints
imposed
Novel
polymers,
designed
for
depolymerization,
concisely
reviewed
terms
their
underlying
chemistry
potential
integration
current
plastic
systems.
Macromolecules,
Год журнала:
2024,
Номер
57(5), С. 1919 - 1940
Опубликована: Фев. 22, 2024
The
large
production
and
indiscriminate
disposal
of
plastics
have
resulted
in
serious
resource
global
environmental
crises,
which
has
raised
a
demand
to
develop
more
sustainable
circular
economy.
An
ideal
strategy
address
the
end-of-life
issue
is
next-generation
polymers
with
closed-loop
life
cycles,
can
be
selectively
depolymerized
back
monomers
at
end
their
service
life.
Aliphatic
polyesters
prepared
by
ring-opening
polymerization
(ROP)
moderately
strained
lactones
shown
great
potential
recyclable
polymers.
This
Perspective
highlights
recent
achievements
for
that
are
derived
from
four-,
five-,
six-,
seven-membered
focusing
on
discussion
thermodynamic
kinetic
considerations,
monomer
design
principles
polymer
preparations,
material
properties,
chemical
recyclability.
Finally,
current
challenges
possible
directions
also
discussed.
Chemical Science,
Год журнала:
2023,
Номер
15(3), С. 832 - 853
Опубликована: Дек. 5, 2023
Insight
into
the
thermodynamics
and
kinetics
of
depolymerization
to
understand
barriers
that
prevent
effective
monomer
regeneration
from
vinyl
polymers,
an
exploration
overcoming
these
limitations.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(22), С. 15286 - 15292
Опубликована: Май 22, 2024
Architecture
underlies
the
thermomechanical
properties
of
polymers.
Yet,
few
strategies
are
available
to
tune
a
polymer's
architecture
after
it
is
prepared
without
altering
its
chemical
composition.
The
ability
edit
polymer
would
dramatically
expand
accessible
architecture-property
space
polymeric
materials.
Herein,
we
disclose
backbone
rearrangement
approach
short-chain
branching
Specifically,
demonstrate
that
palladium(II)-catalyzed
[3,3]-sigmatropic
oxo-rearrangements
can
transform
branched
polyesters
and
polyurethanes
their
linear
counterparts.
While
effects
on
materials
generally
subtle
in
case
polyesters,
more
dramatic
changes
observed
polyurethanes:
two
undergo
soluble-to-insoluble
transition,
one
exhibits
increase
both
strain
at
break
toughness
rearrangement.
Additionally,
incorporation
alkenes
through
enables
facile
deconstruction
via
ethenolysis.
In
all,
powerful
broad-scope
strategy
backbones
thereby
physical
properties.
Polymer Chemistry,
Год журнала:
2024,
Номер
15(20), С. 2047 - 2054
Опубликована: Янв. 1, 2024
We
present
here
a
green
and
value-added
method
for
the
chemical
recycling
of
postconsumer
PBT,
by
its
cyclodepolymerization
into
cyclic
oligoesters
(COBTs),
which
can
be
further
polymerized
with
poly(butylene
adipate)
diols
to
biodegradable
PBAT.
Research Square (Research Square),
Год журнала:
2025,
Номер
unknown
Опубликована: Март 20, 2025
Abstract
The
challenge
of
maintaining
long-term
stability
in
dispersed
nanotube
solutions
arises
the
case
sorting
semiconducting
single-walled
carbon
nanotubes
(s-SWCNTs)
with
conjugated
homopolymers.
A
strategic
approach
that
enhances
steric
hindrance
between
is
desirable
to
inhibit
re-aggregation
effectively.
This
study
systematically
investigates
interactions
BCP-SWCNTs,
assessing
molecular
weight
and
factors
by
introducing
a
nonpolar
poly(ε-caprolactone)
(PCL)
segment
into
lowest-molecular-weight
polyfluorene
(PF)
as
demonstration.
Employing
(PCL6k)3-b-PF6k
miktoarm
architecture
achieves
highly
selective
dispersions
s-SWCNTs
1.145
nm
diameters,
attaining
exceptional
dispersion
for
over
one
year
without
re-aggregation.
Thin-film
transistors
fabricated
from
these
exhibit
hole
mobility
up
11.47
cm2
V−
1
s−
additional
washing
treatment.
structural
design
soft
emerges
powerful
strategy
modulate
SWCNT-SWCNT
interactions,
highlighting
significant
role
branched,
segment-based
BCPs
enhancing
both
selectivity
stability.
