ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(21), P. 13371 - 13377
Published: Oct. 23, 2024
The
development
of
epoxy
resin
formulations
from
renewable
feedstocks
has
been
thoroughly
explored
in
the
chemical
literature.
A
simple
one-pot
reaction
involving
sustainable
phenolic
molecules
and
epichlorohydrin
results
production
monomers.
These
monomers
can
be
cured
with
amines
or
anhydrides
to
yield
cross-linked
thermosetting
resins.
Although
a
wide
variety
recipes
exist,
there
is
notable
gap
application
these
engineering
contexts.
This
primarily
due
lack
comprehensive,
standardized
analyses
recipes,
which
impede
their
potential
use
advanced
composite
applications.
In
this
study,
we
reveal
high-performance
formulation
utilizing
epoxidized
phloroglucinol
derived
brown
algae
combination
an
aerospace-grade
amine
hardener.
processing
thermomechanical
properties
are
investigated
using
ASTM
standard
tests
including
tensile
strength,
flexural
fracture
toughness,
interlaminar
shear
strength.
Given
detailed
comparative
analysis,
partially
recipe
outperforms
petroleum
analogues.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(22)
Published: March 16, 2024
Recycling
of
carbon
fiber-reinforced
polymer
composites
(CFRCs)
based
on
thermosetting
plastics
is
difficult.
In
the
present
study,
high-performance
CFRCs
are
fabricated
through
complexation
aromatic
pinacol-cross-linked
polyurethane
(PU-AP)
thermosets
with
fiber
(CF)
cloths.
PU-AP
exhibit
a
breaking
strength
95.5
MPa
and
toughness
473.6
MJ
m
Advanced Sustainable Systems,
Journal Year:
2024,
Volume and Issue:
8(5)
Published: April 3, 2024
Abstract
Over
the
past
30
years,
polymer
composite
industry
has
flourished,
producing
advanced
structural
materials
for
aviation,
energy,
and
transportation
sectors.
However,
use
of
crosslinked
thermoset
matrices
been
linked
to
significant
end‐of‐life
challenges,
presenting
a
critical
issue
industry.
Moreover,
is
characterized
by
numerous
labor‐intensive
processes.
In
alignment
with
Industry
4.0
principles,
two
major
routes
have
identified
enhance
sustainability:
utilization
high‐performance
thermoplastic
integration
artificial
intelligence
in
manufacturing.
Nevertheless,
there
are
substantial
concerns
regarding
life
cycle
assessment
these
technologies,
which
not
accounted
initial
calculations,
including
environmental
footprint
synthesis
energy
requirements
training
AI.
This
perspective
aims
address
potential
CO
2
emissions
from
chemical
feedstocks
high
computing
new
technologies.
Macromolecules,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 20, 2024
Herein,
we
synthesized
a
difunctionalized
bio-based
vanillin
azine
monomer
(4,4′-((1E,1′E)-hydrazine-1,2-diylidenebis(methaneylylidene))bis(2-methoxyphenol),
VBAZ-2OH)
via
Schiff
base
reaction
between
and
hydrazine
monohydride.
Subsequently,
successfully
prepared
2,2′-(((1E,1′E)-hydrazine-1,2-diylidenebis(methaneylylidene))bis(8-methoxy-2H-benzo[e][1,3]oxazine-6,3(4H)-diyl))bis(ethan-1-ol),
VBAZ-BZ-2OH),
which
contains
oxazine
units,
through
Mannich
condensation
of
VBAZ-2OH
with
ethanolamine
paraformaldehyde
in
1,4-dioxane
as
the
solvent.
The
chemical
structures
these
two
monomers
(VBAZ-2OH
VBAZ-BZ-2OH)
were
characterized
by
using
NMR
FTIR
analyses.
Our
study
aimed
to
investigate
transesterification
reactions
blending
different
VBAZ-BZ-2OH/phenolic
resin
(BP)
compositions
PEO112-b-PCL99
(EC)
diblock
copolymer
form
various
BP/EC
blends.
These
blends
exhibit
competitive
hydrogen-bonding
interaction
phenomena,
analyzed
one-dimensional
two-dimensional
Interestingly,
after
thermal
treatment
at
150
°C,
ordered
self-assembled
lamellae
or
hexagonal
packed
cylinder
transform
into
disordered
micelle
disorder
structure
result
due
EC
becoming
miscible
VBAZ-BZ-2OH
monomer,
disrupting
structure,
was
confirmed
TEM
SAXS
could
easily
understand
order–disorder
morphological
transformation
replace
thermogravimetric
analysis
(TGA)
coupled
microcomputed
gas
chromatography
(TGA-GC)
