ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(47), С. 17301 - 17318
Опубликована: Ноя. 14, 2024
The
issue
of
fire
hazard
safety
with
regard
to
materials
is
great
concern.
Polybutylene
terephthalate/butylene
terephthalate
(PBAT)
the
most
extensively
researched
and
utilized
biodegradable
material.
However,
absence
flame-retardant
chain
segments
in
its
molecular
structure
poses
a
significant
environmental
hazard.
Our
team
utilizes
reversibility
polymerization
reaction
PBT
(polybutylene
terephthalate)
chemical
recycling
process
degrade
into
BHBT
(butylene
terephthalate),
raw
material
for
preparation
PBAT.
At
same
time,
together
halogen-free
environmentally
friendly
CEPPA
(3-hydroxyphenylphosphinyl-propanoic
acid)
BHAT
glycol
adipate),
we
design
produce
an
highly
efficient
PBAT
copolyester
(PBATcept).
closed-loop
nonbiodegradable
small-molecule
oligomers
(BHBT)
PBATcept
was
realized.
successful
introduction
segment
demonstrated
result
reduction
crystalline
properties
improvement
transparency
flame
retardancy.
5.0
mol
%
resulted
tensile
strength
10.93
±
0.97
MPa
elongation
at
break
830.40
48.25%
PBATcept5.0.
Furthermore,
LOI
value
32.0%,
UL-94
rating
V-0.
exerts
synergistic
effects
gas-phase
retardancy
condensed-phase
PBATcept.
During
combustion,
undergoes
preferential
decomposition,
generating
nonflammable
gases
(H2O
CO2)
impede
combustion
dilute
concentration
flammable
gases.
Concurrently,
it
forms
dense
carbon
layer
on
surface
polymer,
which
mitigates
hazards
associated
due
fire.
hydrolysis
retardant
enhances
biodegradation
performance
relative
rate
can
reach
33.92%
after
30
days
when
addition
amount
10.0
%.
ACS Applied Polymer Materials,
Год журнала:
2024,
Номер
6(22), С. 13969 - 13978
Опубликована: Ноя. 6, 2024
While
fully
biodegradable
poly(butylene
adipate-co-terephthalate)
(PBAT)
is
considered
to
be
one
of
the
most
promising
materials,
application
PBAT
materials
still
hindered
due
its
intrinsic
low
mechanical
strength
and
poor
foamability.
Herein,
a
strategy
addressed
construct
PBAT-based
supramolecular
bionanocomposites
high
excellent
foamability
with
homogeneous
dispersion
UPy
aggregates
via
quadruple
hydrogen
bonding.
The
biocomposite
was
prepared
by
direct
melt-blending
isocyanate-terminal
ureido-pyrimidinone
(UPy-NCO)
PBAT.
It
found
that
terminal
hydroxyl
group
quickly
reacted
isocyanate
UPy-NCO
during
mixing
in-situ
formed
dimerized
polymer
(PBAT-UPy-UPy-PBAT)
owing
PBAT-UPy-UPy-PBAT
could
further
folded
longitudinal
hydrogen-bonding
interactions
between
ureido
groups
units,
forming
ordered
needle-like
nanoassemblies
in
matrix.
Such
particular
function
as
physical
cross-linking
points
for
composites,
resulting
simultaneous
improved
This
work
paves
feasible
avenue
manufacturing
high-performance
biocomposites
corresponding
foams,
which
challenging
existing
industrial
technologies.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(47), С. 17301 - 17318
Опубликована: Ноя. 14, 2024
The
issue
of
fire
hazard
safety
with
regard
to
materials
is
great
concern.
Polybutylene
terephthalate/butylene
terephthalate
(PBAT)
the
most
extensively
researched
and
utilized
biodegradable
material.
However,
absence
flame-retardant
chain
segments
in
its
molecular
structure
poses
a
significant
environmental
hazard.
Our
team
utilizes
reversibility
polymerization
reaction
PBT
(polybutylene
terephthalate)
chemical
recycling
process
degrade
into
BHBT
(butylene
terephthalate),
raw
material
for
preparation
PBAT.
At
same
time,
together
halogen-free
environmentally
friendly
CEPPA
(3-hydroxyphenylphosphinyl-propanoic
acid)
BHAT
glycol
adipate),
we
design
produce
an
highly
efficient
PBAT
copolyester
(PBATcept).
closed-loop
nonbiodegradable
small-molecule
oligomers
(BHBT)
PBATcept
was
realized.
successful
introduction
segment
demonstrated
result
reduction
crystalline
properties
improvement
transparency
flame
retardancy.
5.0
mol
%
resulted
tensile
strength
10.93
±
0.97
MPa
elongation
at
break
830.40
48.25%
PBATcept5.0.
Furthermore,
LOI
value
32.0%,
UL-94
rating
V-0.
exerts
synergistic
effects
gas-phase
retardancy
condensed-phase
PBATcept.
During
combustion,
undergoes
preferential
decomposition,
generating
nonflammable
gases
(H2O
CO2)
impede
combustion
dilute
concentration
flammable
gases.
Concurrently,
it
forms
dense
carbon
layer
on
surface
polymer,
which
mitigates
hazards
associated
due
fire.
hydrolysis
retardant
enhances
biodegradation
performance
relative
rate
can
reach
33.92%
after
30
days
when
addition
amount
10.0
%.
