Journal of Applied Polymer Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 11, 2024
Abstract
A
developing
society
requires
polycaprolactam
(PA6)
fibers
with
flame
retardant.
Currently,
the
additive
retardants
commonly
used
in
PA6
cannot
solve
molten
droplet
problem.
In
this
work,
(1
E
,1
′
)‐
N
,
N′
‐(6‐phenyl‐1,3,5‐triazine‐2,4‐diyl)
bis
(1‐(4‐methoxyphenyl)
methanimine)
(NBM)
triazine
ring
structure
was
synthesized.
The
to
expand
into
carbon
and
benzoguanimine
produce
irreversible
chemical
crosslinking
NBM,
thereby
achieving
anti‐dripping
retardant
of
fiber.
LOI
PA6/NBM
8
reaches
30.0
vol.%,
UL‐94
V‐0
when
NBM
addition
amount
is
wt.%,
meanwhile,
residual
content
235.7%
higher
than
that
PA6.
mechanical
strength
can
still
reach
3.22
cN/dTex.
From
structural
design
synthesis,
effects
on
retardants,
rheology,
thermal
stability
morphology
x
were
analyzed
detail
work.
It
hoped
future
characteristics
performance
requirements
be
matched
provide
reference
for
conception
synthesis
oriented
other
polymers.
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 11, 2025
ABSTRACT
Ammonium
polyphosphate
(APP)
and
intumescent
flame‐retardant
di‐(3‐amin‐opropyltriethoxysilane)
spirocyclic
pentaerythritol
diphosphate
(PDAP)
were
prepared
as
an
flame
retardant
with
synergistic
effect,
polylactic
acid
(PLA)
was
modified
by
melt
blending.
The
retardancy
of
PLA/PDAP/APP
evaluated
limiting
oxygen
index
(LOI),
vertical
combustion
test
(UL‐94),
cone
calorimetry
(CCT),
the
thermal
stability
studied
thermogravimetric
analysis
thermogravimetry‐Fourier
transform
infrared
spectroscopy
(FTIR).
possible
mechanisms
analyzed
based
on
results
laser
Raman
FTIR.
When
PDAP:APP
=
2:1
addition
amount
PDAP/APP
is
20
wt%,
LOI
value
PLA/IFR‐modified
material
high
43%,
UL‐94
reaches
V‐0
level,
in
CCT,
PHRR
THR
(2:1)‐modified
are
reduced
80.7%
76.8%,
respectively,
compared
pure
PLA,
carbon
residue
62.01%.
show
that
compound
APP/PDAP
has
excellent
effect
which
provides
a
good
research
case
for
PLA
flame‐retardant‐modified
plastic
materials.
Polymers,
Год журнала:
2024,
Номер
16(10), С. 1341 - 1341
Опубликована: Май 9, 2024
The
application
of
continuous
glass
fiber-reinforced
polypropylene
thermoplastic
composites
(GF/PP)
is
limited
due
to
the
inadequate
flame
retardancy
(PP)
matrix.
Apart
from
altering
composition
retardants,
distribution
modes
retardants
also
impact
material
performance.
In
this
study,
an
alternative
approach
involving
non-uniform
proposed,
namely,
dispersed
distribution,
in
which
non-flame-retardant-content
layers
(NFRLs)
and/or
low-flame-retardant-content
(LFRLs)
are
among
high-flame-retardant-content
(HFRLs).
mechanical,
retardant
and
dielectric
properties
GF/PP
with
intumescent
(IFR/GF/PP)
investigated
comparatively
under
uniform,
gradient,
distributions
retardants.
results
demonstrate
that
exhibits
superior
performance
compared
uniform
distribution.
Dispersed
enables
IFR/GF/PP
attain
enhanced
mechanical
reduced
constants
while
maintaining
excellent
flame-retardant
properties.
Polymers for Advanced Technologies,
Год журнала:
2024,
Номер
35(9)
Опубликована: Сен. 1, 2024
Abstract
A
novel
thermoplastic
elastomer,
kernel
resin
(KN),
α‐nucleating
agent
(HPN),
and
β‐nucleating
(DCHT),
which
acted
as
toughener
nucleating
agents
(NAs),
were
used
to
improve
the
mechanical
properties
crystallization
behaviors
of
isotactic
polypropylene
(PP).
The
impact
strength
PP/KN
blends
increased
significantly
with
increase
in
KN
concentration.
Surprisingly,
PP/KN/NA
improved
further
upon
addition
NA.
toughening
effect
DCHT
was
stronger
than
that
HPN.
maximum
PP/KN/DCHT
blend
reached
69.2
kJ/m
2
when
content
0.05%,
six
times
higher
neat
PP.
SEM
images
fractured
surfaces
showed
a
change
from
brittle
fracture
ductile
fracture.
Moreover,
WAXD
results
incorporation
HPN
promoted
formation
α
form
crystalline
Addition
induced
generation
α‐β
crystal
transition
Furthermore,
differential
scanning
calorimetry
crystallizability
overall
rate
PP
enhanced
by
half‐crystallization
time
at
128°C
decreased
5.52
(neat
PP)
0.34
min
(PP/KN/DCHT‐0.3).
