Journal of Composites Science,
Год журнала:
2025,
Номер
9(1), С. 15 - 15
Опубликована: Янв. 2, 2025
As
a
result
of
the
conducted
studies,
method
combining
components
and
foaming
parameters
for
obtaining
foam
epoxides
has
been
selected.
The
relationship
between
structure
epoxide
amount
added
blowing
agent—ammonium
carbonate—has
established.
This
study
explores
development
fire-safe
foamed
epoxy
composites
by
incorporating
technogenic
waste
from
ceramic
brick
production.
optimized
demonstrated
improved
compressive
strength,
enhanced
fire
resistance
(the
LOI—35–44%—and
successful
UL-94
V-0
testing)
through
use
flame
retardants
(Tris(2-methylphenyl)
phosphate
Decabromodiphenyl
oxide)
low
thermal
conductivity
(0.030–0.042
W/m
K),
highlighting
their
potential
as
sustainable
insulation
materials.
Polymers,
Год журнала:
2024,
Номер
16(15), С. 2155 - 2155
Опубликована: Июль 29, 2024
Amid
environmental
pollution
and
resource
depletion,
developing
utilizing
biomass
resources
as
alternatives
to
petroleum
is
a
prominent
research
focus.
Driven
by
protection
sustainable
development,
the
shift
from
petroleum-based
bio-based
polyurethane
prevailing
trend
in
material
development.
Biomass
sources
such
vegetable
oil,
polysaccharides,
lignin
offer
extensive
application
prospects
production.
Functional
modifications
of
these
polyurethanes
can
further
expand
their
range.
This
article
explores
preparation
various
polyurethanes,
applications
across
different
fields,
anticipated
future
development
uses.
Polymers,
Год журнала:
2022,
Номер
14(11), С. 2201 - 2201
Опубликована: Май 28, 2022
At
present,
the
consumption
of
polyurethane
is
huge
in
various
industries.
As
a
result,
it
has
become
research
hotspot
to
use
environmentally
friendly
and
renewable
bio-based
raw
materials
(instead
petroleum-based
materials)
prepare
polyurethane.
In
this
paper,
epoxy
soybean
oil
(ESO)
was
used
as
material,
polyethylene
glycol
(PEG-600)
for
ring
opening.
Fourier
transform
infrared
(FT-IR)
proton
nuclear
magnetic
resonance
(1H
NMR)
analysis
proved
that
oil-based
polyester
polyols
prepared.
Soybean
(SPU)
synthesized
by
reaction
polyol
with
isophorone
diisocyanate
(IPDI),
so
save
energy
protect
environment.
The
properties
SPU
films
were
adjusted
changing
R
value
(the
molar
ration
-NCO/-OH)
film
forming
temperature.
chemical
structure
characterized
FTIR,
1H
NMR,
gel
permeation
chromatography
(GPC),
scanning
electron
microscopy
(SEM),
thermogravimetric
(TGA),
differential
calorimetry
(DSC).
results
show
mechanical
strength,
water
contact
angle,
microphase
separation
degree,
barrier
property,
thermal
stability
gradually
increase,
while
transparency,
oxygen
permeability
coefficient
moisture
decrease
increase
Polymers,
Год журнала:
2021,
Номер
13(15), С. 2469 - 2469
Опубликована: Июль 27, 2021
We
report
on
rigid
polyurethane
(PUR)
foams
prepared
using
different
contents
of
a
mixture
two
bio-polyols
(20–40
php).
The
were
obtained
through
epoxidation
and
ring
opening
reaction.
Different
chemical
structures
the
resulted
from
use
1-hexanol
1,6-hexanediol
as
agents.
characterized
by
hydroxyl
values
104
250
mgKOH/g
viscosities
643
5128
mPa·s,
respectively.
Next,
influence
foaming
process
PUR
systems
well
foam
properties
was
evaluated.
bio-foams
modified
with
next
compared
reference
polyether
petrochemical
polyol.
effect
apparent
density
reduction
result
replacing
polyol
minimized
decreasing
water
content
in
formulation.
It
found
that
modification
recipe
changing
water,
acting
agent,
did
not
affect
process.
However,
introduction
limited
reactivity
reducing
maximum
temperature
bio-materials
comparable
densities
to
material
similar
thermal
conductivity
coefficient
decrease
their
mechanical
strengths.
A
deterioration
caused
plasticization
matrices
containing
dangling
chains.
all
materials
dimensionally
stable
at
room
temperature.
Polymers,
Год журнала:
2024,
Номер
16(7), С. 942 - 942
Опубликована: Март 29, 2024
The
utilization
of
polyols
derived
from
renewable
sources
presents
an
opportunity
to
enhance
the
sustainability
rigid
polyurethane
(PUR)
foams,
thereby
contributing
advancement
a
circular
bioeconomy.
This
study
explores
development
PUR
foams
exclusively
using
sourced
second-generation
biomass
feedstocks,
specifically
depolymerized
birch
bark
suberin
(suberinic
acids)
and
tall
oil
fatty
acids.
achieved
total
material
content
as
high
74%,
with
suberinic
acid
37%.
Response
surface
modeling
was
employed
determine
optimal
bio-polyol,
blowing
agents,
catalyst
content,
hence,
optimizing
bio-based
foam
formulations.
In
addition,
response
applied
formulations
based
on
commercially
available
petroleum-based
for
comparison.
results,
including
apparent
density
(~40–44
kg/m3),
closed
cell
(~95%),
compression
strength
(>0.2
MPa,
parallel
foaming
direction),
thermal
conductivity
(~0.019
W/(m·K)),
demonstrated
that
acids-based
exhibited
competitive
qualities
in
comparison
polyols.
Remarkably,
comprised
up
29%
materials.
These
findings
highlight
potential
acid-tall
effective
candidates
developing
offering
promising
solutions
sustainable
insulation
applications.
Materials,
Год журнала:
2021,
Номер
14(13), С. 3474 - 3474
Опубликована: Июнь 22, 2021
Rigid
polyurethane
foams
were
obtained
using
two
types
of
renewable
raw
materials:
bio-polyols
and
a
cellulose
filler
(ARBOCEL®
P
4000
X,
JRS
Rettenmaier,
Rosenberg,
Germany).
A
system
containing
40
wt.%
rapeseed
oil-based
polyols
was
modified
with
the
in
amounts
1,
2,
3
php
(per
hundred
polyols).
The
incorporated
into
polyol
premix
as
dispersion
petrochemical
made
calenders.
examined
terms
degree
crystallinity
powder
X-ray
diffraction
PXRD
-and
presence
bonds
by
means
fourier
transform
infrared
spectroscopy
FT-IR.
It
found
that
addition
increased
number
cells
both
cross-sections—parallel
perpendicular
to
direction
foam
growth—while
reducing
sizes
those
cells.
Additionally,
had
closed
cell
contents
more
than
90%
initial
thermal
conductivity
coefficients
24.8
mW/m∙K.
insulation
materials
dimensionally
stable,
especially
at
temperatures
close
0
°C,
which
qualifies
them
for
use
low
temperatures.
Polymers,
Год журнала:
2021,
Номер
13(23), С. 4214 - 4214
Опубликована: Дек. 1, 2021
In
the
effort
to
produce
renewable
and
biodegradable
polymers,
more
studies
are
being
undertaken
explore
environmentally
friendly
sources
replace
petroleum-based
sources.
The
oil
palm
industry
is
not
only
biggest
vegetable-oil
producer
from
crops
but
also
one
producers
of
residual
that
cannot
be
used
for
edible
purposes
due
its
low
quality.
this
paper
development
biopolymers
oil,
with
10%
jatropha
algae
as
additives
were
explored.
Polyols
different
oils
prepared
by
epoxydation
peroxyacetic
acid
alcoholysis
under
same
conditions
further
reacted
poly
isocyanate
form
polyurethanes.
Epoxidized
oils,
polyols
polyurethanes
analyzed
techniques
such
TGA,
DSC,
DMA,
FTIR
H-NMR.
Overall,
although
IV
slightly
higher
than
usage
additive
into
was
shown
significantly
increase
hard
segments
thermal
stability
bio
polyurethane
compared
polymer
oil.
Furthermore,
when
mixed
it
possible
identify
phosphate
groups
in
polyol
which
might
enhance
fire-retardant
properties
final
biopolymer.
