Chemical Science,
Год журнала:
2024,
Номер
15(24), С. 9353 - 9360
Опубликована: Янв. 1, 2024
An
expedient
synthesis
of
electron-deficient
styrenes
is
accomplished
through
decarboxylation
and
oxidation
via
halogen
ion
transfer.
The
resulting
umpoled
intermediates
undergo
a
rebound
elimination
to
furnish
olefins.
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.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Фев. 17, 2024
Abstract
Ethylene/α-olefin
copolymers
are
produced
in
huge
scale
and
widely
used,
but
their
after-use
disposal
has
caused
plastic
pollution
problems.
Their
chemical
inertness
made
re/upcycling
difficult.
Ideally,
PE
materials
should
be
de
novo
to
have
a
circular
closed-loop
lifecycle.
However,
synthesis
of
ethylene/α-olefin
copolymers,
including
high-volume,
linear
low-density
as
well
high-value
olefin
elastomers
block
presents
particular
challenge
due
difficulties
introducing
branches
while
simultaneously
installing
recyclability
directly
using
industrial
ethylene
α-olefin
feedstocks.
Here
we
show
that
coupling
coordination
copolymerization
α-olefins
with
designed
functionalized
chain-transfer
agent,
followed
by
modular
assembly
the
resulting
AB
telechelic
polyolefin
building
blocks
polycondensation,
affords
series
ester-linked
PE-based
copolymers.
These
new
not
only
retain
thermomechanical
properties
also
exhibit
full
circularity
via
simple
transesterification
markedly
enhanced
adhesion
polar
surfaces.
Energy & Fuels,
Год журнала:
2024,
Номер
38(3), С. 1676 - 1691
Опубликована: Янв. 22, 2024
Mechanical
recycling
of
plastic
waste
is
not
sustainable
and
inefficient
in
terms
the
resources
needed
to
accomplish
process,
quality
materials
obtained
from
this
technique
substandard.
Chemical
polymers
appears
be
preferable
because
technology
allows
for
production
new
materials.
This
review
compiles
most
recent
research
which
selected
transition
metals
are
used
as
catalysts
hydrogenolytic
depolymerization
polyolefins
a
polymer
upcycling
process.
Hydrogenolysis
an
emerging
chemical
method
that
uses
transition-metal
complexes
presence
hydrogen
cleave
C–C
bonds
substances
into
shorter
hydrocarbons.
Transition
such
Ruthenium
(Ru),
Platinum
(Pt),
Nickel
(Ni),
Cobalt
(Co),
Zirconium
(Zr),
Tantalum
(Ta),
Rhodium
(Rh)
have
been
utilized
recently
type
reaction.
hydrogenolysis
can
produce
valuable
hydrocarbon
products,
gas/liquid
fuels
lubricating
oils,
under
relatively
milder
operational
conditions
with
less
environmental
impact.
The
focused
on
supported
metal
organometal
catalytic
system
their
mechanism
polyolefin
pathways
detailed
investigation
impact
reaction
parameters
high
gasoline,
diesel,
light
lubricants.
Chemical Science,
Год журнала:
2024,
Номер
15(23), С. 8606 - 8624
Опубликована: Янв. 1, 2024
Electrochemistry
shows
promising
new
avenues
in
the
recycling
of
polymeric
materials.
This
work
reviews
electrochemical
depolymerization,
post-polymerization
functionalization,
and
paired
catalysis,
highlighting
future
challenges
opportunities.
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.
Polymer Chemistry,
Год журнала:
2024,
Номер
15(9), С. 884 - 895
Опубликована: Янв. 1, 2024
With
neighboring
group
participation,
polypropylene-based
transesterification
covalent
adaptable
networks
were
facilely
prepared
via
the
reaction
of
maleic
anhydride
grafted
polypropylene
and
diol
without
using
external
catalysts.