Journal of Applied Polymer Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 21, 2024
Abstract
Polyurethanes
consist
of
hard
and
soft
segments,
with
the
segments
typically
comprising
blocks
containing
isocyanate
groups,
while
often
chains
terminated
hydroxyl
groups.
The
contribute
to
mechanical
properties
polyurethanes,
provide
elasticity
flexibility.
essence
curing
lies
in
mixing
subjecting
system
high
temperatures.
kinetics
PEG/PCL/IPDI/N100
in‐situ
block
copolymers
were
investigated
using
dynamic
isothermal
differential
scanning
calorimetry
(DSC).
Key
parameters
obtained
from
non‐isothermal
DSC
curves,
these
incorporated
into
an
n
‐order
reaction
model
determine
type
apparent
activation
energy,
thus
deriving
equation.
follows
‐th
order
autocatalytic
reaction,
where
is
1,
energy
approximately
52.79
kJ/mol.
Based
on
equation,
process
conditions,
namely
initial
temperature
(T
i
),
peak
exothermic
p
finishing
f
deduced.
Studying
thermosetting
polyurethanes
can
deepen
our
understanding
interactions
mechanisms
between
reactants
under
different
thereby
enhancing
grasp
process.
Furthermore,
research
a
basis
for
optimizing
preparation
processes.
Macromolecular Rapid Communications,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 30, 2024
Semi-interpenetrating
polymer
networks
(SIPNs)
have
garnered
significant
interest
due
to
their
potential
applications
in
self-healing
materials,
drug
delivery
systems,
electrolytes,
functional
membranes,
smart
gels
and,
toughing.
SIPNs
combine
the
characteristics
of
physical
cross-linking
with
advantageous
chemical
properties,
offering
broad
application
prospects
materials
science
and
engineering.
This
perspective
introduces
history
semi-interpenetrating
diverse
applications.
Additionally,
ongoing
challenges
associated
traditional
are
discussed
provide
an
outlook
on
future
advancements
novel
SIPNs.
Functional
corrosion
inhibitors
can
enhance
the
anticorrosion
performance
of
epoxy
resin;
however,
traditional
tend
to
lose
structural
integrity
when
coating
is
damaged
and
fail
provide
secondary
protection
metal
substrate.
In
this
work,
zinc
silicate/polypyrrole
(Zn2SiO4/PPy)
composite
was
synthesized
via
an
in
situ
self-induced
polymerization
method.
During
salt
water
immersion
test
process,
artificially
coatings
exhibited
self-healing
characteristics,
attributed
Fe3+
ions
solution
acting
as
initiator
for
polypyrrole
(PPy),
causing
dissociated
pyrrole
monomer
continue
polymerizing
into
PPy.
addition,
specific
capacitance
Zn2SiO4/PPy
composites
increased
by
11.67
F/g
compared
Zn2SiO4,
which
indicates
that
has
a
higher
storing
electrons.
The
contact
angle
74.0°
improved
21.7
15.7°
with
Zn2SiO4
PPy,
reducing
area
or
other
corrosive
solutions
on
coated
surface.
impedance
value
16.62
times
resin
at
120
h.
This
work
provides
new
approach
development
inhibitors.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 12, 2025
ABSTRACT
Self‐healing
polyurethane
elastomers
with
dynamic
crosslinking
networks
are
promising
candidates
for
intelligent
next‐generation
coatings.
However,
their
constitutive
relation
shows
conflicts
between
high
mechanical
performance
and
room‐temperature
self‐healing,
as
well
recyclability.
Here,
a
regulation
strategy
of
triple‐crosslinked
network
in
the
hard
domain
was
proposed
to
achieve
multifunction
enhancement
via
covalent
borate
ester
bonds
coupling
noncovalent.
The
distribution
ratio
bonds,
boron‐nitrogen
coordination
multiple
hydrogen
were
meticulously
designed
balance
fracture
reconstruction
molecular
network.
introduced
enabled
basic
self‐healing
through
molecule‐level
topological
evolution.
abundant
provided
external
noncovalent
reversible
networks,
thus
improving
tensile
strength
toughness
physical
points.
obtained
exhibited
impressive
light
transmittance
93%,
41.07
MPa,
elongation
at
break
1673.20%,
166.74
MJ
m
−3
,
almost
entirely
48
h.
These
even
maintained
90%
original
properties
after
suffering
three
recycles.
This
may
promote
practical
application
coatings
automobile
flexible
electronic
industry.
