Polymer Bulletin,
Год журнала:
2024,
Номер
81(11), С. 9851 - 9870
Опубликована: Фев. 22, 2024
Abstract
Polybutylene
terephthalate
(PBT)
nanocomposites
were
melt-blended
with
two
types
of
Turkish
halloysite
nanotubes
(HN).
Naturally
occurring
HN
samples
used
to
produce
PBT-based
composites
at
the
compositions
1%,
3%,
5%,
and
10%.
Findings
neat
silane-coated
HN-containing
composite
compared
investigate
interfacial
adhesion
between
polymer
matrix
reinforcement
material.
According
test
results,
a
1%
amount
was
found
be
most
suitable
option
in
case
mechanical
thermal
properties
composites.
Additionally,
silane-modified
grade
displayed
highly
indicative
improvements
pristine
clay
due
better
PBT
accomplished.
Property
enhancements
achieved
for
containing
low
contents
confirmed
by
morphological
examinations.
As
result,
PBT/
HN-S
sample
bookmarked
as
fabricate
HN-reinforced
terms
mechanical,
thermo-mechanical,
morphological,
thermal,
physical
performances
based
on
findings
this
study.
Silane-modified
grades
exhibited
they
more
applications
PBT.
Graphical
abstract
Chemical Reviews,
Год журнала:
2024,
Номер
124(12), С. 7829 - 7906
Опубликована: Июнь 3, 2024
Covalent
network
polymers,
as
materials
composed
of
atoms
interconnected
by
covalent
bonds
in
a
continuous
network,
are
known
for
their
thermal
and
chemical
stability.
Over
the
past
two
decades,
these
have
undergone
significant
transformations,
gaining
properties
such
malleability,
environmental
responsiveness,
recyclability,
crystallinity,
customizable
porosity,
enabled
development
integration
dynamic
chemistry
(DCvC).
In
this
review,
we
explore
innovative
realm
polymers
focusing
on
recent
advances
achieved
through
application
DCvC.
We
start
examining
history
fundamental
principles
DCvC,
detailing
its
inception
core
concepts
noting
key
role
reversible
bond
formation.
Then
reprocessability
DCvC
is
thoroughly
discussed,
starting
from
milestones
that
marked
evolution
progressing
to
current
trends
applications.
The
influence
crystallinity
then
reviewed,
covering
diversity,
synthesis
techniques,
functionalities.
concluding
section,
address
challenges
faced
field
speculates
potential
future
directions.
Chemical Science,
Год журнала:
2023,
Номер
14(20), С. 5243 - 5265
Опубликована: Янв. 1, 2023
This
review
provides
a
multidisciplinary
overview
of
the
challenges
and
opportunities
for
dynamic
covalent
chemistry-based
macromolecules
towards
design
new,
sustainable,
recyclable
materials
circular
economy.
ACS Applied Polymer Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 9, 2025
This
study
explores
the
use
of
chitosan
as
a
sustainable
alternative
in
vitrimerization
thermoset
epoxy
resins.
Epoxy/chitosan
vitrimer
composites,
with
and
without
an
external
catalyst
(zinc
acetate),
well
epoxy/zinc
acetate
vitrimers
reference
samples,
were
successfully
fabricated
through
mechanochemical
ball-milling,
followed
by
hot-pressing.
Comprehensive
multiscale
analyses
conducted,
results
compared
existing
literature.
Incorporating
significantly
enhanced
process,
leading
to
remarkable
improvements
mechanical
performance,
solvent
resistance,
stress
relaxation.
Specifically,
inclusion
15
wt
%
chitosan,
catalyst,
increased
vitrimer's
elastic
modulus
100%
tensile
strength
35%
virgin
resin,
while
reducing
relaxation
time
approximately
800
s,
order
magnitude
lower
than
epoxy/cellulose
reported
Remarkably,
presence
zinc
acetate,
epoxy/chitosan
composites
further
decreased
150
increasing
210%
80%,
respectively,
those
resin.
The
reduction
was
attributed
chitosan's
primary
amine
hydroxyl
groups,
which
facilitated
multiple
exchange
reactions
(transesterification,
ester-to-amide,
transamidation)
acted
self-catalysts
for
transesterification.
Enhancements
properties
zinc-coordinated
interactions
within
polymer
networks.
also
investigates
influence
cross-linking
density
activation
energy
competitive
parameters
on
behavior
glass
transition
temperature
(Tg)
vitrimers.
multiple-dynamic
network
rapid
characteristics
make
them
promising
candidates
variety
applications,
supporting
circular
economy.
work
represents
first
resins,
advancing
development
recyclable
materials.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(45), С. 16354 - 16364
Опубликована: Ноя. 1, 2023
The
insufficient
molecular
weight
of
linear
poly(butylene
adipate-co-terephthalate)
(PBAT)
leads
to
poor
foamability
and
mechanical
performance
foams,
which
seriously
restricts
the
industrial
application
PBAT
as
foam
materials.
Herein,
biobased
itaconic
anhydride
was
grafted
onto
backbone,
then
epoxidized
soybean
oil
added
obtain
a
dynamic
cross-linked
network
based
on
Zn(II)-catalyzed
transesterification.
rheology
results
showed
that
storage
modulus
viscosity
vitrimers
increased
obviously,
exhibiting
viscous
liquid-like
elastic
solid-like
transition
behavior
with
increasing
degrees.
Reversible
cleavage
cross-links
reformation
integrated
through
rebonding
bonds
were
observed
under
shears
alternative
large-
low-amplitude
oscillations,
endowing
fluidity
elasticity
during
processing.
exhibited
strain-hardening
in
an
extensional
flow
could
be
foamed
by
supercritical
carbon
dioxide
foaming.
lightweight
show
expansion
ratio
up
26.7-fold
density
0.045
g/cm3.
On
coupling
cell
structure
properties
contributed
network,
foams
enhanced
elasticity,
specific
compressive
strength,
damping
properties.
strategy
altering
viscoelasticity
simultaneously
cross-linking
provides
new
approach
toward
obtaining
high-performance
foams.
Sustainable Chemistry,
Год журнала:
2023,
Номер
4(4), С. 363 - 393
Опубликована: Дек. 18, 2023
Poly(ethylene
terephthalate),
the
fifth
most
produced
polymer,
generates
significant
waste
annually.
This
increased
production
has
spurred
interest
in
chemical
and
mechanical
pathways
for
recycling.
The
shift
from
laboratory
settings
to
larger-scale
implementation
creates
opportunities
explore
value
recovery
of
recycling
products.
Derived
glycolysis
PET,
bis(2-hydroxyethyl)
terephthalate
(BHET)
exhibits
versatility
as
a
depolymerization
product
valuable
monomer.
BHET
finds
application
across
diverse
industries
such
resins,
coatings,
foams,
tissue
scaffolds.
Incorporating
BHET,
which
is
product,
supports
higher
rates
contributes
more
sustainable
approach
generating
materials.
review
illuminates
feedstock
circular
polymer
materials
economy.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(34), С. 12562 - 12570
Опубликована: Авг. 15, 2023
Dynamic
covalent
polymer
networks
(DCPNs)
with
self-healing
and
recycling
performance
are
highly
relevant
to
sustainable
development.
Disposal
of
plastic
wastes
generated
during
DCPN
reprocessing
still
faces
serious
challenges
deserves
be
explored.
Herein,
high-performance
polyacylsemicarbazide
(PASC)
DCPNs
exhibiting
excellent
properties
synthesized
by
the
reaction
sebacic
dihydrazide
isophorone
diisocyanate
hexamethylene
trimer.
Upcycling
PASC
waste
after
four-time
is
achieved
adding
epoxy
monomers
amine
curing
reagents,
followed
a
thermal
treatment.
The
optimized
resin
exhibits
tensile
strength
101
MPa,
Young's
modulus
2.73
GPa,
elongation
at
break
8.67%,
toughness
7.13
MJ·m–3,
Tg
140
°C,
Td
250
which
overall
surpass
those
original
DCPNs,
demonstrating
upcycling
performance.
recycled
from
carbon
fiber-reinforced
can
upcycled
using
same
strategy.
fiber
re-employed
prepare
composites
robust
mechanical
properties.
Given
low
cost
commercial
availability
monomers,
successful
not
only
reduces
environmental
pollution,
but
also
enables
possible
industrialization
contributes
circular
economy.
