Polymer Chemistry,
Год журнала:
2024,
Номер
15(24), С. 2476 - 2481
Опубликована: Янв. 1, 2024
Chemoselective
polymerization
from
a
mixture
of
l
-LA,
CHO
and
CO
2
enables
the
synthesis
PLLA,
PCHC
or
PCHC-
b
-PLLA
achieved
by
PBB-Br.
The
chemoselectivity
depends
on
nature
growing
polymer
chain
end.
Macromolecules,
Год журнала:
2023,
Номер
56(5), С. 1759 - 1777
Опубликована: Фев. 28, 2023
Carbon
dioxide
(CO2)
is
considered
a
renewable
one-carbon
building
block
for
chemical
synthesis
owing
to
its
abundance,
low
toxicity,
nonflammability,
and
availability.
The
incorporation
of
CO2
into
the
polymer
backbone
affords
various
ester-
or
carbonyl-containing
moieties,
which
create
desired
material
properties
impart
unique
degradability
after
use
under
microbial
conditions.
In
this
Perspective,
we
focus
on
critical
advances
in
CO2-derived
polymers
highlight
catalytic
strategies,
novel
conceptual
routes,
potential
application
fields.
outlook
perspective
are
provided
describe
future
challenges
new
strategies
establishing
CO2-based
with
performances
economic
competitiveness
comparable
that
petroleum-based
materials.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(7), С. 3384 - 3456
Опубликована: Янв. 1, 2024
The
scientific
community
has
witnessed
extensive
developments
and
applications
of
organoboron
compounds
as
synthetic
elements
metal-free
catalysts
for
the
construction
small
molecules,
macromolecules,
functional
materials
over
last
two
decades.
This
review
highlights
achievements
organoboron-mediated
polymerizations
in
past
several
decades
alongside
mechanisms
underlying
these
transformations
from
standpoint
polymerization
mode.
Emphasis
is
placed
on
free
radical
polymerization,
Lewis
pair
ionic
(cationic
anionic)
polyhomologation.
Herein,
alkylborane/O
Angewandte Chemie International Edition,
Год журнала:
2022,
Номер
61(46)
Опубликована: Сен. 22, 2022
Poly(cyclopentene
carbonate)
(PCPC)
produced
by
copolymerization
of
CO2
and
cyclopentene
oxide
(CPO)
is
a
promising
but
challenging
chemical
recyclable
polymer
that
has
high
potential
in
minimizing
plastic
pollution
maximizing
utilization.
Currently,
problems
remain
to
be
solved,
include
low
reactivity
toxic
metal
catalysts,
inevitable
byproducts,
especially
the
ambiguous
mechanism
understanding.
Herein,
we
present
first
metal-free
access
PCPC
using
series
modular
dinuclear
organoboron
catalysts.
was
afforded
an
unprecedented
catalytic
efficiency
1.0
kg
PCPC/g
catalyst;
while
depolymerization
abides
combination
pathway
random
chain
scission
unzipping,
returning
CPO
near-quantitative
yield
(>99
%).
The
preparation
along
with
depth
understanding
related
mechanisms
would
helpful
for
further
development
advanced
catalysts
plastics.
Macromolecules,
Год журнала:
2023,
Номер
56(3), С. 892 - 898
Опубликована: Янв. 23, 2023
We
herein
report
the
synthesis
of
commercially
attractive
low
molar
mass
polycarbonate
polyols
obtained
through
ring-opening
copolymerization
CO2
and
epoxides,
using
a
series
borinane-based
bifunctional
organocatalysts
in
presence
chain
transfer
agents
(CTAs).
These
catalysts
enable
CO2/epoxide
copolymerizations
with
high
linear
vs
cyclic
selectivity
outstanding
productivity
for
both
poly(cyclohexane
carbonate)
(18.2
kg/g
catalyst)
poly(ether
propylene
(1.1
catalyst).
exhibit
all
features
living
processes;
resulting
polycarbonates
could
be
precisely
controlled
by
varying
[monomer]/CTA
ratio.
The
performance
these
implying
loading
shows
great
potential
applications
large-scale
preparation
CO2-based
polyols.