B(C6F5)3
was
reported
as
an
efficient
metal-free
catalyst
for
synthesis
of
poly(silyl
ether)s
through
hydrosilylation
polyaddition
disilanes
with
diketones
at
ambient
conditions.
In
this
study,
we
aimed
to
develop
via
reaction
between
2,4,6,8-tetramethylcyclotetrasiloxane
(TMCS)
having
four
reactive
Si–H
groups
and
various
diketones.
The
prepolymers
are
possible
postfunctionalization
postprocessing
because
the
remaining
could
undergo
thermal
cross-linking
reactions.
It
has
been
that
combination
cyclosiloxane
causes
undesirable
gelation
due
hydride
transfer
ring-opening
polymerization
(HTRP).
Based
on
our
previous
investigation
about
way
suppression
HTRP,
have
successfully
synthesized
five
liquid
reducing
time
total
monomer
concentration.
Thermal
curing
by
self-cross-linking
residual
gave
freestanding
films
hydrolysis
resistance
high
stability
above
600
°C
despite
presence
organic
linkers
in
main
chain.
development
novel
functionalizable
cross-linkable
further
expanded
possibilities
different
applications
functional
materials.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(15), P. 9209 - 9218
Published: July 22, 2024
Aromatic
disulfides
have
seen
widespread
use
in
covalent
adaptable
networks
(CANs),
though
previous
studies
exclusively
used
step-growth
methods
to
integrate
them
into
CANs.
Here,
we
describe
a
case
which
an
aromatic
disulfide-based
cross-linker,
bis(4-methacryloyloxyphenyl)
disulfide,
also
called
BiPheS
methacrylate
or
BPMA,
is
incorporated
CAN
by
nonstep-growth
polymerization.
Free-radical
copolymerization
of
n-hexyl
with
5
mol
%
BPMA
results
exhibits
full
recovery
cross-link
density
and
thermomechanical
properties
across
multiple
reprocessing
cycles.
The
rubbery-plateau
storage
modulus
directly
proportional
absolute
temperature,
characteristic
constant
density,
even
at
temperatures
where
the
reprocessable.
Indeed,
BPMA-based
thus
associative
dynamic
character,
up
least
200
°C,
enabling
it
be
elevated-temperature
applications
without
risk
loss
network
character.
Under
3.0
kPa
shear
stress,
almost
total
arrest
creep
180
°C
major
suppression
its
temperature
overcoming
potential
Achilles'
heel
associated
Thus,
integration
CANs
free-radical
polymerization
provides
facile
route
produce
recyclable
that
maintain
character
very
high
contributing
polymer
sustainability.
Finally,
determined
Arrhenius
apparent
activation
energy
∼100
kJ/mol
for
stress
relaxation
viscosity.
This
value
differs
substantially
from
bond
dissociation
but
agrees
alpha-relaxation
poly(n-hexyl
methacrylate)
(PHMA).
indicates
dependence
these
viscoelastic
responses
our
associative-type
defined
cooperative
segmental
mobility
PHMA,
makes
95
CAN.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
17(9), P. 13170 - 13178
Published: Dec. 16, 2024
This
study
addresses
the
extension
of
service
life
carbon-fiber
reinforced
epoxies
by
inducing
thermal
healing
microcracks
through
use
a
vitrimer
as
polymeric
matrix.
Our
aim
was
to
explore
feasibility
using
blend
selected
carboxylic
acids
(citric,
glutaric,
and
sebacic
acids)
commercial
monomers
design
matrix
specifically
developed
for
technological
implementation
in
composites
with
ability
intrinsic
repair
under
moderate
(even
remote)
heating
treatments.
The
selection
formulation
(the
acid
blend,
catalysts,
monomers)
result
an
exhaustive
prescreening
analysis
processing
requisites
final
properties.
glass
transition
temperature
cured
composite
measured
differential
scanning
calorimetry
(DSC)
is
94
°C,
value
lying
range
required
several
applications,
whereas
stress
relaxation
(1/e)
initial
took
∼4.7
h
at
180
°C
only
1.1
200
°C.
Composites
containing
50
vol
%
carbon
fibers
could
be
successfully
prepared
compression
molding.
Acoustic
emission
tests
proved
formation
partial
during
tensile
performed
until
350
MPa.
Surface
scratches
also
healed
remote
activation
near-infrared
irradiation
(NIR).
These
first
results
nonoptimized
cycles
are
proof
concept
that
microcrack
scratch
can
produced
high
glass-transition
epoxy-based
carbon-reinforced
composites.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 9, 2025
Abstract
Replacing
non‐recyclable
thermosets
with
covalent
adaptable
networks
(CANs)
that
recover
cross‐link
density
after
reprocessing
will
reduce
waste
and
contribute
to
a
circular
polymer
economy.
Many
CANs
undergoing
associative
dynamic
exchange
require
catalysis.
External
catalysis
often
leads
harmful
effects,
e.g.,
increased
creep,
accelerated
material
aging,
catalyst
leaching.
Herein,
internally
catalyzed
siloxane
chemistry
is
demonstrated
resulting
from
amides
covalently
linked
through
alkyl
chains
siloxanes.
Small‐molecule
studies
show
the
formation
of
products
reaction
two
amide‐containing
molecules.
From
rubbery
plateau
modulus,
each
siloxane‐exchange‐based
CAN
exhibits
temperature‐invariant,
or
nearly
so,
characteristic
CANs.
The
length
in
siloxane‐containing
monomer
tunes
network
density.
Cross‐link
recovery
achieved,
required
time
temperature
decreasing
increasing
Stress
relaxation
also
faster
dynamics
reprocessability
arise
because
second
order
(i.e.,
cross‐linker)
concentration.
Capitalizing
on
this,
melt
extrusion
highest
demonstrated,
achieving
same
extruded
compression‐molded
Using
identical
conditions,
next‐highest
not
extrudable.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(3), P. 365 - 365
Published: Jan. 29, 2024
Vitrimers,
as
dynamic
covalent
network
polymers,
represent
a
groundbreaking
advancement
in
materials
science.
They
excel
their
applications,
such
advanced
thermal-conductivity
composite
materials,
providing
sustainable
alternative
to
traditional
polymers.
The
incorporation
of
vitrimers
into
fillers
enhances
alignment
and
heat
passway
broadly,
resulting
superior
thermal
conductivity
compared
conventional
thermosetting
Their
exchange
reactions
enable
straightforward
reprocessing,
fostering
the
easy
reuse
damaged
opening
possibilities
for
recycling
both
matrix
filler
components.
We
review
an
overview
present
advancements
utilizing
highly
thermally
conductive
materials.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(7), P. 1498 - 1498
Published: March 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
