ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(7), P. 4215 - 4225
Published: April 3, 2024
Introducing
covalent
adaptable
networks
(CANs)
into
polydimethylsiloxane
(PDMS)
elastomers
is
an
effective
approach
to
solving
the
recycling
issue
of
thermoset
PDMS
materials.
However,
CANs
generally
exhibit
favorable
dynamic
properties
achieve
efficient
recycling,
which
leads
poor
thermal
stability
and
creep
resistance.
Herein,
we
successfully
constructed
silyl
ether-based
within
system
by
incorporating
thermally
stable
ether
linkages,
resulting
in
reprocessable
with
excellent
mechanical
properties,
remarkable
stability,
desirable
Compared
samples
without
networks,
prepared
elastomer
presented
a
70
°C
increase
T50
(the
temperature
at
50%
weight
loss),
reaching
as
high
635
°C.
Meanwhile,
after
10
reprocessing
cycles,
can
still
be
almost
completely
restored,
demonstrating
superior
reprocessability.
More
importantly,
owing
exhibited
resistance
120
Therefore,
rational
construction
balance
between
recyclability.
Polymers,
Journal Year:
2025,
Volume and Issue:
17(7), P. 897 - 897
Published: March 27, 2025
The
development
of
sustainable
epoxy
vitrimers
with
outstanding
mechanical
strength
and
facile
self-healing
capabilities
are
great
significance
for
prolonging
the
lifespan
enhancing
reliability
electronic
devices.
In
this
study,
we
present
a
castor
oil-derived
vitrimer
(ASB-ECO)
featuring
dual
dynamic
networks
enabled
by
rationally
designed
ester-imine
bonds
an
aromatic
Schiff
base-conjugated
crosslinker
architecture.
This
molecular
design
strategy
effectively
enhances
properties
vegetable
oil-based
endows
them
controllable
under
photothermal
conversion.
1.0-ASB-ECO
system
demonstrates
characteristics
activation
energy
(Ea)
37.25
kJ/mol
topological
freezing
transition
temperature
(Tv)
123.13
°C.
material
exhibits
conversion
efficiency
(ηPT
=
61.42%)
can
achieve
rate
100%
visible-light
radiation.
addition,
displays
dielectric
constant
(Dk)
5.54
loss
tangent
(Df)
0.025
at
106
Hz.
study
on
biomass-based
presents
novel
approach
to
developing
materials,
achieving
combination
high
performance,
sustainability,
properties.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(9), P. 1224 - 1224
Published: April 27, 2024
The
flammability
of
epoxy
resins
and
knowing
how
to
achieve
curing
are
particularly
important
factors
during
use.
A
novel
approach
for
enhancing
the
fire
resistance
reducing
smoke
emission
resin
process
is
suggested,
which
involves
utilization
a
three-source
integrated
polymerization
intumescent
flame-retardant.
In
this
study,
synthesis
poly
4,4-diaminodiphenylsulfone
spirocyclic
pentaerythritol
bisphosphonate
(PCS)
achieved
through
using
solution
polymerization,
utilizing
4,4′-diaminodiphenylsulfone
(DDS)
bisphosphorate
disphosphoryl
chloride
(SPDPC)
as
initial
components.
Following
that,
EP
underwent
inclusion
PCS
examine
its
heat,
ability
prevent
flames,
effectiveness
in
effect.
Compared
unmodified
resin,
addition
can
not
only
cure
but
also
decompose
before
has
good
carbonization
With
7
wt.%
PCS,
LOI
value
31.2%
successfully
pass
UL-94
test
with
V-0
rating.
Moreover,
cone
calorimeter
experiment
demonstrated
noteworthy
decline
59.7%
maximum
heat
release
rate
(pHRR),
63.7%
overall
(THR),
42.3%
total
generation
(TSP).
Based
on
examination
TG-FTIR
SEM
findings,
there
ample
evidence
suggest
that
functioning
phosphorus-nitrogen
flame-retardant
combines
three
origins,
potential
exhibit
favorable
impact
both
gas
condensed
phases.
The
SiO2
aerogel
is
attractive
for
thermal
insulation
but
plagued
by
poor
mechanical
and
high
drying
process
costs.
Therefore,
there
an
urgent
requirement
developing
a
low-cost,
low-density,
low-thermal
conductivity,
hydrophobic
monolithic
with
strength.
This
work
reports
two
epoxy-enhanced
amine-modified
silica
aerogels
(AMSA).
One
type
to
utilize
3-aminopropyl-triethoxysilane
(APTES)
tetraethylorthosilicate
(TEOS)
synthesize
AMSA
first,
ensured
be
crack-free
introducing
ionic
liquids
(IL)
into
the
reaction
system,
then
cross-link
epoxy
resin
obtain
composite
framework
structure
two-step
enhancement
gel
network
strategy
(TES-AMSA).
Composite
are
thermally
insulating
hydrophobic,
maximum
compression
strength
of
TES-AMSA
reaches
3.97
MPa,
minimum
conductivity
water
contact
angle
(WCA)
0.031
W
m–1
K–1
137°,
respectively.
Another
way
add
as
reinforcement
solvent
system
before
forming
without
role
IL.
A
like
brick
one-step
(OES-AMSA)
was
produced
under
atmospheric
pressure
drying.
OES-AMSA
reached
1.57
MPa.
In
addition,
also
has
low
(0.035
K–1)
WCA
(143°).
Two
provide
insight
designing
pressure-resistant
materials,
aiming
use
them
material
crude
oil
storage
tanks,
ultralow-temperature
refrigerators,
construction
materials.
Macromolecular Chemistry and Physics,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 17, 2025
Abstract
Dynamic
covalent
polymer
networks
(DCPNs)
are
a
class
of
cross‐linked
polymeric
materials
with
good
self‐healing
properties,
processability,
and
recyclability.
These
generally
possess
dynamic
bonds
which
can
undergo
reversible
cleavage
reformation
under
certain
conditions.
The
cross‐linking
nature
the
endows
them
needed
mechanical
strength
as
well
processibility,
effectively
bridging
gap
between
traditional
thermosets
thermoplastics.
However,
in
many
cases,
relying
on
alone
cannot
always
achieve
satisfactory
material
so
modification
DCPNs
has
been
one
hot
spots
this
area.
This
review
summarizes
recent
research
progress
DCPNs,
including
introduction
multiple
filler
blending,
analyzes
how
modifications
improve
specific
properties.
provides
comprehensive
overview
diverse
methods
to
manipulate
structures
properties
may
expand
their
potential
applications.
