Coatings,
Год журнала:
2025,
Номер
15(4), С. 376 - 376
Опубликована: Март 23, 2025
Unsaturated
polyester
(UP)
resin
is
widely
utilized
in
the
construction
and
automotive
industries.
The
flammable
nature
of
UP
must
be
constrained
when
its
products
are
manufactured.
A
novel
organic
flame
retardant
has
been
synthesized
from
9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide
(DOPO)
triallyl
isocyanate
(TAIC).
This
DOPO-TAIC
additive
used
to
reduce
flammability
a
matrix.
Additionally,
this
was
then
combined
with
dopamine-modified
silicon
carbide
(M-SiC)
further
diminish
UP.
limiting
oxygen
index
(LOI)
value
combustion
UP/DOPO-TAIC/M-SiC
blend
30.8%
filler
contents
M-SiC
15
wt.%
30
wt.%,
respectively.
These
materials
exhibited
UL
94
V-0
rating
for
combustion.
Compared
values
neat
UP,
peak
heat
release
rate
(Pk-HRR)
total
(THR)
were
reduced
by
51%
35%,
mode
action
blends
containing
composed.
presence
P-Si
elements
can
significantly
compared
that
unmodified
resin.
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 8, 2025
ABSTRACT
In
order
to
improve
the
flame
retardancy,
smoke
suppressing,
and
mechanical
properties
of
epoxy
resins
(EP),
while
pursuing
low
toxicity,
environmental
protection,
sustainable
development,
a
reactive
biobased
retardant
(TVD)
containing
P/N
was
synthesized
by
one‐pot
method.
The
retardant,
consisting
vanillin,
2,4,6‐triaminopyrimidine,
DOPO
as
reactants,
contained
groups
in
its
structure
introduced
co‐curing
agent
into
DDM‐cured
EP
system.
EP/TVD10
(at
phosphorus
content
0.58
wt%)
achieved
UL‐94
V‐0
rating
with
an
increased
limit
oxygen
index
(LOI)
value
34.2%
(26.5%
for
pure
EP),
cone
calorimetric
test
(CCT)
results
showed
decrease
total
heat
release
(THR)
values
33.8%
production
rate
(TSP)
21.1%
compared
EP.
addition,
introduction
TVD
improved
resin,
increase
flexural
strength
modulus
8.7%
6.5%
slight
impact
toughness
EP/TVD10.
These
indicate
that
is
multifunctional
efficient
bio‐based
which
provides
new
ideas
development
high‐performance
modified
resin
materials.
Polymers,
Год журнала:
2024,
Номер
16(11), С. 1471 - 1471
Опубликована: Май 22, 2024
Magnesium
hydroxide,
as
a
green
inorganic
flame-retardancy
additive,
has
been
widely
used
in
polymer
flame
retardancy.
However,
magnesium
hydroxide
is
difficult
to
disperse
with
epoxy
resin
(EP),
and
its
performance
poor,
so
it
use
flame-retardant
resin.
In
this
study,
an
efficient
hydroxide-based
retardant
(MH@PPAC)
was
prepared
by
surface
modification
of
2-(diphenyl
phosphine)
benzoic
acid
(PPAC)
using
simple
method.
The
effect
MH@PPAC
on
the
properties
for
resins
investigated,
mechanism
studied.
results
show
that
5
wt%
can
increase
limiting
oxygen
index
EP
from
24.1%
38.9%,
achieving
V-0
rating.
At
same
time,
compared
EP,
peak
heat
release
rate,
smoke
production
total
CO
generation
rate
EP/5
composite
material
decreased
53%,
45%,
51.85%,
53.13%
respectively.
cooperative
PPAC
MH
promotes
formation
continuous
dense
char
layer
during
combustion
process
EP-blend
material,
significantly
reducing
exchange
combustible
gases,
effectively
hindering
process.
Additionally,
enhances
dispersion
matrix,
endowing
superior
mechanical
meet
practical
application
requirements,
thereby
expanding
scope
materials.
Langmuir,
Год журнала:
2024,
Номер
40(24), С. 12573 - 12593
Опубликована: Июнь 6, 2024
Through
the
substitution
reaction
between
9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide
(DOPO)
and
sodium
lignosulfonate
(LS),
a
novel
phosphorus-containing
(DAL)
was
successfully
synthesized
via
solvothermal
method
used
as
multifunctional
flame
retardant
to
prepare
silicone-acrylic
emulsion
(SAE)
composite
Si–P–C
coating.
The
structure
of
DAL
determined
by
X-ray
diffraction
(XRD),
attenuated
total
reflection
infrared
spectroscopy
(ATR-FTIR),
photoelectron
(XPS),
nuclear
magnetic
resonance
(solid-state
13C
NMR
31P
NMR).
results
demonstrated
that
incorporating
an
appropriate
dosage
(0.9
g,
1.5
wt
%)
into
SAE-based
coatings
enhances
retardancy
reduces
heat
release
smoke
production
during
burning.
peak
rate
(p-HRR)
decreases
from
236.7
120.3
kW·m–2,
(TSP)
71.1%,
flame-retardant
index
increases
1.00
4.58.
Meanwhile,
coating
is
transformed
dense
nonflammable
vitreous
polyphosphate
barrier
layer
firing
process
prevent
or
mass
transfer.
Furthermore,
pyrolysis
kinetics
identify
3D
Z–L–T
model
governs
coatings'
pyrolysis,
makes
Eα
climb
300.98
331.30
kJ·mol–1
at
358–439
°C.
Hence,
this
study
presents
new
synthesis
DAL,
studies
excellent
properties
cross-linking
mechanism
DAL-doped
SAE-composite
coatings,
explores
halogen-free,
low-carbon,
clean
eco-technology
strategy.
