Macromolecules,
Год журнала:
2024,
Номер
57(9), С. 4516 - 4523
Опубликована: Май 3, 2024
We
report
the
synthesis
of
PE
and
poly(ethylene-co-vinyl
acetate)
(EVA)
bearing
a
low
content
in-chain
thioester
functions
introduced
via
co-
or
terpolymerization
approach
involving
ethylene
(E),
vinyl
acetate
(VAc),
ε-thionocaprolactone
(TCL).
To
achieve
homogeneous
incorporation
along
chains
resulting
from
ring
opening
TCL,
semibatch
process
with
an
adjusted
feed
TCL
was
employed.
Characterizations
polymers
were
conducted
by
combination
size
exclusion
chromatography
(SEC)
nuclear
magnetic
resonance
(NMR)
analyses.
The
chemically
induced
degradability
obtained
assessed
SEC.
Molecules,
Год журнала:
2024,
Номер
29(7), С. 1498 - 1498
Опубликована: Март 27, 2024
Polymer
research
is
currently
focused
on
sustainable
and
degradable
polymers
which
are
cheap,
easy
to
synthesize,
environmentally
friendly.
Silicon-based
thermally
stable
can
be
utilized
in
various
applications,
such
as
columns
coatings.
Poly(silyl
ether)s
(PSEs)
an
interesting
class
of
silicon-based
that
easily
hydrolyzed
either
acidic
or
basic
conditions
due
the
presence
silyl
ether
Si-O-C
bond.
Synthetically,
these
formed
several
different
ways,
most
effective
friendly
synthesis
dehydrogenative
cross
coupling,
where
byproduct
H
Chemical Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
To
establish
a
sustainable
society,
the
development
of
polymer
materials
capable
reverting
into
monomers
on
demand
is
crucial.
Traditional
methods
rely
breaking
labile
bonds
such
as
esters
in
main
chain,
which
limits
applicability
to
polymers
that
consist
robust
covalent
bonds.
We
found
integration
directing
groups
allowed
engineering
resilient
with
built-in
recyclability.
Our
study
showcases
phenylene
ether-based
fortified
groups,
can
be
selectively
disassembled
under
nickel
catalysts
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 23, 2024
Abstract
Developing
plastics
that
fill
the
need
of
polyolefins
yet
are
more
easily
recyclable
is
a
critical
to
address
plastic
waste
crisis.
However,
most
efforts
in
this
vein
have
focused
on
high‐density
polyethylene
(PE),
while
many
different
types
PE
exist.
To
create
broadly
sustainable
with
modular
properties,
we
present
synthesis,
characterization,
and
demonstration
materials
applications
for
chemically
PE‐like
multiblock
polymers
prepared
from
distinct
hard
soft
blocks
using
ruthenium‐catalyzed
dehydrogenative
polymerization.
By
altering
branching
pattern
within
blocks,
series
were
synthesized
tunable
glass
transition
temperatures
(
T
g
)
maintaining
consistent
high
melting
m
).
A
clear
U‐shape
trend
between
mechanical
properties
was
found,
showcasing
their
potential
as
tailored
spanning
commercial
linear
low‐density
(LLDPE)
(LDPE).
These
offer
adjustable
adhesive
strength
metal
demonstrate
chemical
recyclability
selective
depolymerization
mixed
streams,
promoting
circularity
separation.
Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 23, 2024
Abstract
Developing
plastics
that
fill
the
need
of
polyolefins
yet
are
more
easily
recyclable
is
a
critical
to
address
plastic
waste
crisis.
However,
most
efforts
in
this
vein
have
focused
on
high‐density
polyethylene
(PE),
while
many
different
types
PE
exist.
To
create
broadly
sustainable
with
modular
properties,
we
present
synthesis,
characterization,
and
demonstration
materials
applications
for
chemically
PE‐like
multiblock
polymers
prepared
from
distinct
hard
soft
blocks
using
ruthenium‐catalyzed
dehydrogenative
polymerization.
By
altering
branching
pattern
within
blocks,
series
were
synthesized
tunable
glass
transition
temperatures
(
T
g
)
maintaining
consistent
high
melting
m
).
A
clear
U‐shape
trend
between
mechanical
properties
was
found,
showcasing
their
potential
as
tailored
spanning
commercial
linear
low‐density
(LLDPE)
(LDPE).
These
offer
adjustable
adhesive
strength
metal
demonstrate
chemical
recyclability
selective
depolymerization
mixed
streams,
promoting
circularity
separation.
Macromolecules,
Год журнала:
2024,
Номер
57(9), С. 4516 - 4523
Опубликована: Май 3, 2024
We
report
the
synthesis
of
PE
and
poly(ethylene-co-vinyl
acetate)
(EVA)
bearing
a
low
content
in-chain
thioester
functions
introduced
via
co-
or
terpolymerization
approach
involving
ethylene
(E),
vinyl
acetate
(VAc),
ε-thionocaprolactone
(TCL).
To
achieve
homogeneous
incorporation
along
chains
resulting
from
ring
opening
TCL,
semibatch
process
with
an
adjusted
feed
TCL
was
employed.
Characterizations
polymers
were
conducted
by
combination
size
exclusion
chromatography
(SEC)
nuclear
magnetic
resonance
(NMR)
analyses.
The
chemically
induced
degradability
obtained
assessed
SEC.
