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.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(51), P. 18123 - 18130
Published: Dec. 14, 2023
This
study
focuses
on
the
development
of
green
and
high-performance
recyclable
polymers
using
cross-linked
epoxidized
natural
rubber
(ENR).
ENR,
derived
from
biobased
rubber,
offers
reactive
epoxy
groups
that
make
it
an
ideal
raw
material
for
creating
materials.
Succinic
anhydride
(SA)
is
employed
as
a
cross-linking
agent,
forming
dynamic
ester
bonds
through
ring-opening
reactions
with
groups.
The
resulting
ENR
demonstrates
excellent
mechanical
properties
without
need
fillers
(the
tensile
strength
ENR40+SA-10
reached
up
to
17.85
MPa),
along
stable
shape
memory
(shape
fixed
ratio
>
97.0%,
recovery
94.5%),
high
recyclability
ratios
elongation
at
break
95%
after
two
recycling
circles),
self-welding
properties.
Moreover,
adjustable
Tg
values
(−30
19
°C)
wide
damping
temperature
range
materials
provide
good
characteristics,
including
those
room
temperature.
simple
efficient
strategy
new
approach
production
ENR-based
materials,
which
will
potentially
contribute
reducing
environmental
pollution
expending
their
applications
in
areas
such
vibration
packaging.
Royal Society of Chemistry eBooks,
Journal Year:
2025,
Volume and Issue:
unknown, P. 287 - 340
Published: April 28, 2025
This
chapter
offers
an
elaborative
background
regarding
the
significance
of
green
tyres
over
traditional
considering
their
respective
environmental
impacts.
The
focus
is
on
sustainable
ingredients
like
alternatives
natural
rubber,
bio-based
elastomers/synthetic
rubbers,
processing
oils,
reversible
crosslinking
strategy,
sustainable/bio-resourced
fillers
and
tyre
cords
for
compounding
rubbers.
also
discusses
economic
assessment
production
cost
a
better
understanding
viability
process.
Several
case
studies
have
been
exercised
systematically
documented
in
each
section
this
exploring
thorough
literature
survey
area.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2023,
Volume and Issue:
11(38), P. 13950 - 13961
Published: July 31, 2023
A
simple
and
facile
method
to
prepare
fully
biobased
epoxy
elastomers
with
a
high
toughness
is
still
big
challenge.
In
this
study,
series
of
were
prepared
by
curing
different
epoxidized
plant
oils
diamine
Priamine
1074.
The
behavior
catalytic
process
these
was
systematically
studied.
effects
the
numbers
groups
equivalent
ratios
amine
on
performance
(thermal
stability,
mechanical
properties,
etc.)
studied
discussed.
Furthermore,
potential
as
wearable
flexible
sensors
explored.
It
found
that
ring
opening
polymerization
ester
aminolysis
reaction
between
diamines
simultaneously
occurred
during
process.
thermophysical
could
be
tailored
selecting
controlling
groups.
maximum
elongation
at
break
reach
up
338.58%.
After
spray
coating
Ag
nanowires,
resins
demonstrated
excellent
detection
motion
signals
various
joints
other
regions
body.
Combining
results
not
being
cytotoxic
Caco-2
cells,
reported
in
study
are
expected
applied
field
sensors.
Macromolecules,
Journal Year:
2024,
Volume and Issue:
57(21), P. 9943 - 9949
Published: Oct. 23, 2024
Oxidative
cracking
of
polyolefins
into
functionalized
molecules
or
oligomers
promises
the
chemical
upcycling
plastic
wastes.
In
this
work,
we
develop
a
novel
approach
to
polyolefin
waste
that
utilizes
low-temperature
oxidative
combined
with
dynamic
cross-linking
produce
recyclable
elastomers.
High-density
polyethylene
is
oxidized
end
carboxyl
groups
at
110
°C,
achieving
tunable
number-average
molecular
weights
(Mn)
ranging
from
1500
5500
Da
distributions
(D̵)
between
2.91
and
3.33.
These
high
crystallinity
directly
react
amorphous
cis-polybutadiene
containing
pendant
epoxy
(an
product
cis-polybutadiene)
through
esterification,
forming
dynamically
cross-linked
elastomer.
The
elastomer
displays
low
glass
transition
temperature
(Tg)
approximately
−100
°C
while
maintaining
melting
point
(Tm)
above
80
°C;
it
showcases
Young′s
modulus
(E)
12.0
±
0.4
MPa,
elongation
break
(ε)
600
28%,
tensile
strength
(σ)
16.4
0.8
toughness
(UT)
46.0
3.5
MJ·m–3,
good
elasticity
81.8%
elastic
recovery
in
10-cycle
test,
even
higher
than
commercial
POEs
such
as
POE-8150
Dow
Company.
ester-bond-based
enables
be
reprocessed.
Our
study
introduces
an
efficient
process
for
wastes,
eliminating
need
tedious
separation
steps
products.
