ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(20), P. 12598 - 12605
Published: Oct. 8, 2024
Dynamically
cross-linked
polyolefins
represent
a
sustainable
and
high-performance
polyolefin
material
that
attracts
great
attention.
In
this
work,
series
of
cross-linkable
norbornenyl
copolymers
with
tunable
acetoacetate-terminated
comonomer
compositions
are
successfully
synthesized
via
ring-opening
metathesis
polymerization
(ROMP).
Furthermore,
the
resulting
can
be
cured
primary
amine
cross-linker
to
form
vinylogous
urethane
(VU)
containing
cyclic
olefin
vitrimers,
providing
opportunities
for
enhanced
properties.
Our
results
demonstrate
tailoring
constitutional
unit
linear
is
viable
strategy
designing
vitrimers
cross-linking
density,
which
used
regulate
thermomechanical
properties
markedly.
Moreover,
evidence
manifests
density
free
groups
play
vital
roles
in
dynamic
VU-based
vitrimers.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
124(16), P. 9609 - 9632
Published: July 25, 2024
Recycling
mixed
polyolefin
plastics
is
a
significant
challenge
due
to
the
limitations
in
sorting
and
degraded
mechanical
properties
of
blends.
Nonreactive
compatibilization
by
adding
small
amount
polymeric
additive
widespread
approach
restoring
performance
value
recycled
plastics.
Over
past
several
decades,
synthetic
advances
have
enabled
access
low-cost
copolymers
precision
architectures
for
deepening
understanding
mechanisms
semicrystalline
polyolefins.
This
review
covers
design
parameters
compatibilizer,
testing
blends,
methods
producing
economically
viable
additives,
surveys
literature
blends
compatibilized
HDPE,
LLDPE,
LDPE,
iPP.
From
this,
readers
should
gain
comprehension
polymer
mechanics,
synthesis,
macromolecular
engineering
processable
along
with
field's
future
directions.
Advanced Sustainable Systems,
Journal Year:
2024,
Volume and Issue:
8(6)
Published: Jan. 9, 2024
Abstract
The
fast‐growing
usage
of
electronics
is
creating
large
amounts
e‐waste
(electronic
waste),
most
which
are
directly
sent
into
landfills
or
incinerated
as
recycling
either
impractical
too
costly.
Therefore,
it
believed
that
degradable,
environmentally
friendly
materials
the
solution
to
this
pressing
issue.
Herein,
disintegrable,
durable,
and
highly
stretchable
strain
sensors
developed
based
on
elastic
thin
films
made
sodium
carboxymethyl
cellulose,
glycerol,
polyvinyl
alcohol.
polymer
show
a
failure
up
≈
330%
low
hysteresis
(5.74%
at
second
cycle)
when
subjected
50%
cyclic
strain,
due
formation
inter
intramolecular
hydrogen
bonds.
Carbon
nanofibers
with
Au
film
deposited
film,
resulting
in
piezoresistive
maximum
gauge
factor
1.7.
More
interestingly,
as‐developed
can
be
completely
broken
down
hot
water
(at
95
°C)
within
25
min,
indicating
their
remarkable
disintegrability.
This
unique
characteristic
expected
contribute
environmental
sustainability.
applications
sensor
for
joint
bending
recognition
well
physiological
sign
measurement
have
been
demonstrated.
Industrial & Engineering Chemistry Research,
Journal Year:
2025,
Volume and Issue:
64(9), P. 5080 - 5086
Published: Feb. 24, 2025
The
development
of
polymer
materials
with
high
performance
and
good
reusability
is
critical
to
sustainability
the
industry.
However,
balance
these
two
aspects
in
elastomers
rubbers
highly
challenging.
Here,
we
report
synthesis
a
novel
polyolefin
elastomer
(POE)
dynamically
cross-linked
by
an
imine-linked
boronic
ester.
It
improves
tensile
strength
at
break
(σ)
POE
148.2%,
Young's
modulus
(E)
92.6%,
toughness
(UT)
49.4%,
slightly
decreased
elongation
break.
also
has
higher
thermal
resistance
than
pristine
one
presents
steady
storage
plateau
2.8
MPa
above
150
°C.
Moreover,
it
can
be
reprocessed
impressive
recovery
ratio
UT
89.7%
because
dynamic
exchanges
ester
imine.
Dynamic
mechanical
analysis
shows
that
cross-linking
short
characteristic
relaxation
time
9.6
min
low
apparent
activation
energy
65.1
kJ·mol–1.
Our
study
on
POEs
provides
new
way
for
sustainable
elastomers.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(11), P. 6530 - 6539
Published: June 3, 2024
Natural
polymers
are
known
for
their
"green"
characteristics
with
high
biodegradability
and
biocompatibility
thus
have
great
potential
the
development
of
transient
sensors.
In
this
paper,
flexible
stretchable
piezoresistive
sensors
were
developed
based
on
natural
polymer
blends
starch
cellulose.
When
starch,
water-soluble
sodium
carboxymethyl
cellulose,
plasticizer
glycerol
combined,
highly
thin
films
created
subsequently
used
as
substrates
to
develop
degradable
strain
The
resultant
exhibit
a
gauge
factor
3.9,
fast
response
(response
time
0.38
s),
durability,
failure
up
180%,
low
hysteresis
(∼15%)
when
exposed
20%
cyclic
tensile
strain.
demonstrated
abilities
detect
respiration
rate
human
joint
bending
(such
wrist,
finger,
neck
joints).
More
significantly,
it
was
shown
that
sensor
can
be
dissolved
in
hot
water
(95
°C),
indicating
is
easily
disposed
of.
It
expected
offers
sustainable
options
electronics
applications
health
sports
monitoring
human–machine
interfaces.
