ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 18, 2024
Polyamide
6
(PA6)
is
an
eminent
engineering
plastic
renowned
for
its
exceptional
mechanical
attributes,
yet
flammability
restricts
application
scope.
Aluminum
diethylphosphinate
(ADP)
has
exhibited
ability
to
significantly
reduce
the
of
PA6,
it
incapable
enhancing
char-forming
capacity
PA6.
More
importantly,
ADP
causes
serious
damage
properties
Here,
a
boron-containing
polymer
(PDBD)
was
prepared
and
added
PA6
together
with
prepare
flame-retardant
composites.
Compared
PA6/13ADP,
PA6/10ADP/3PDBD
sample
3
wt
%
PDBD
replacing
not
only
can
pass
UL-94
V-0
rating,
but
also,
peak
heat
release
rate
(PHRR)
total
(THR)
were
reduced
by
35.6%
16.5%,
respectively.
Simultaneously,
incorporation
enhanced
potential
signifying
robust
synergism
between
in
catalyzing
facilitating
procedure
Significantly,
compared
those
elongation
at
break
notch
impact
strengths
composites
are
notably
increased
174.3%
45.8%
due
hydrogen
bond
These
results
illustrate
that
effectively
augment
charring
propensity
PA6/ADP
mitigate
detrimental
effects
on
Therefore,
this
work
provides
simple
feasible
method
preparing
high-performance
Against
the
background
of
practical
application
requirements
and
sustainable
development,
achieving
an
equilibrium
between
crystallization,
mechanical
properties
flame
retardancy
polylactide
(PLA)
with
a
green
strategy
has
been
challenge.
Additionally,
previous
work
lacked
to
explore
structure-activity
relationship.
Herein,
four
lignin-derived
phosphonamides
containing
P-C
P-O-C
bonds
were
synthesized
used
fabricate
PLA
composites.
The
crystallization
behaviors,
composites
systematically
compared,
influence
structure
on
flame-retardant
mechanism
was
emphasized.
DSC
results
showed
that
these
act
as
nucleating
agents
they
significantly
improved
capacity
PLA.
Interestingly,
are
more
effective
than
in
accelerating
rate,
increasing
nucleation
density
reducing
crystal
size.
Beyond
that,
maintain
outstanding
properties,
exhibited
significant
improvement.
6
wt%
fulfilled
UL-94
V-0
ratings
enhanced
LOI
values.
Phosphonamides
endow
higher
efficiency,
while
enable
Flame
retardant
analysis
suggests
primarily
vapor
phase,
condensed
phase.
is
realized
by
synergistic
effects
drop
away,
free
radical
trapping,
dilutive
influence,
residual
char.
In
summary,
this
research
provides
for
fabrication
overall
performance,
which
exhibits
broad
prospect
industry.
In
order
to
improve
the
specimens'
flame-retardant
qualities,
ethyl
orthosilicate
was
impregnated
into
them
using
a
combination
of
delignification
process
and
in
situ
growing
approach.
Lignification
has
been
demonstrated
increase
cellular
gap
specimen
maximize
impregnation
orthosilicate.
Moreover,
growth
method
results
specimens
containing
silica
manufactured
from
orthosilicate,
thereby
forming
composite
material
with
enhanced
properties.
The
examination
changes
properties
before
after
modification
conducted
FTIR
spectroscopy,
XRD,
XPS,
SEM,
other
experimental
techniques.
modified
exhibited
higher
comparison
untreated
specimens.
Furthermore,
mechanical
properties,
characterized
by
an
augmented
compressive
strength
34.9
MPa
strength-to-weight
ratio
158
MPa·cm·g-1,
that
did
not
undergo
process.
experiments
show
proposed
green
technology
provides
new
for
producing
composites
could
significantly
qualities
wood.
