Chinese Journal of Chemistry,
Journal Year:
2023,
Volume and Issue:
41(10), P. 1155 - 1162
Published: Jan. 20, 2023
Comprehensive
Summary
Heterogenization
can
improve
the
thermal
tolerance
of
olefin
polymerization
catalysts
and
result
in
good
product
morphology
control,
which
are
two
important
parameters
for
industrial
polyethylene
production.
In
this
work,
α‐diimine
nickel
bearing
–OH
or
–ONa
anchoring
groups
were
designed
prepared.
The
enable
facile
heterogenization
on
silica.
heterogeneous
demonstrated
enhanced
stabilities,
along
with
high
catalytic
activity
at
120
°C
(up
to
5.5
×
10
6
g·PE·mol·Ni
–1
·h
).
Furthermore,
process
results
improvements
many
other
parameters,
including
polymer
1.9
7
)
molecular
weight
(
M
n
up
2.3
g·mol
More
importantly,
structure
properties
products
be
controlled
by
catalyst
structures,
conditions
achieve
mechanical
elasticity.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(28), P. 18797 - 18803
Published: July 5, 2024
Rapid,
efficient
development
of
homogeneous
catalysts
featuring
desired
performance
is
critical
to
numerous
catalytic
transformations
but
remains
a
key
challenge.
Typically,
this
task
relies
heavily
on
ligand
design
that
often
based
trial
and
error.
Herein,
we
demonstrate
"catalyst
editing"
strategy
in
Ni-catalyzed
ethylene/acrylate
copolymerization.
Specifically,
alkylation
pendant
phosphine
followed
by
anion
exchange
provides
high
yield
for
large
number
cationic
Ni
phosphonium
with
varying
electronic
steric
profiles.
These
are
highly
active
copolymerization,
their
behaviors
correlated
the
electrophile
used
late-stage
functionalization.
Polymers,
Journal Year:
2022,
Volume and Issue:
14(18), P. 3809 - 3809
Published: Sept. 12, 2022
The
less-expensive
and
earth-abundant
nickel
catalyst
is
highly
promising
in
the
copolymerization
of
ethylene
with
polar
monomers
has
thus
attracted
increasing
attention
both
industry
academia.
Herein,
we
have
summarized
recent
advancements
made
state-of-the-art
catalysts
different
types
ligands
for
how
these
modifications
influence
performance,
as
well
new
polymerization
modulation
strategies.
With
regard
to
α-diimine,
salicylaldimine/ketoiminato,
phosphino-phenolate,
phosphine-sulfonate,
bisphospnine
monoxide,
N-heterocyclic
carbene
other
unclassified
chelates,
properties
each
fine
key
parameters
(activity,
molecular
weight,
comonomer
incorporation
rate,
etc.)
are
revealed
detail.
Despite
significant
achievements,
many
opportunities
possibilities
yet
be
fully
addressed,
a
brief
outlook
on
future
development
long-standing
challenges
provided.
Chinese Journal of Chemistry,
Journal Year:
2023,
Volume and Issue:
41(10), P. 1155 - 1162
Published: Jan. 20, 2023
Comprehensive
Summary
Heterogenization
can
improve
the
thermal
tolerance
of
olefin
polymerization
catalysts
and
result
in
good
product
morphology
control,
which
are
two
important
parameters
for
industrial
polyethylene
production.
In
this
work,
α‐diimine
nickel
bearing
–OH
or
–ONa
anchoring
groups
were
designed
prepared.
The
enable
facile
heterogenization
on
silica.
heterogeneous
demonstrated
enhanced
stabilities,
along
with
high
catalytic
activity
at
120
°C
(up
to
5.5
×
10
6
g·PE·mol·Ni
–1
·h
).
Furthermore,
process
results
improvements
many
other
parameters,
including
polymer
1.9
7
)
molecular
weight
(
M
n
up
2.3
g·mol
More
importantly,
structure
properties
products
be
controlled
by
catalyst
structures,
conditions
achieve
mechanical
elasticity.
