4D Printing Behavior of PETG/SEBS Blends: A Comparative Study of Reactive and Non-Reactive SEBS with Varied Styrene Content
Polymer,
Год журнала:
2025,
Номер
unknown, С. 128059 - 128059
Опубликована: Янв. 1, 2025
Язык: Английский
The Sea‐Island Structured EPDM/PP TPV With Shape Memory Performance In Situ Compatibilized by Magnesium Maleic and Maleic Anhydride
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 6, 2025
ABSTRACT
It
is
challengeable
to
obtain
shape
memory
effect
in
the
traditional
thermoplastic
vulcanizate
(TPV)
with
sea‐island
microstructure.
Herein,
we
successfully
achieved
behavior
type
of
ethylene
propylene
diene
monomer/polypropylene
(EPDM/PP
TPV)
compatibilized
by
graft
products
magnesium
maleic
(MgMA)
and
anhydride
(MAH)
on
interface
EPDM/PP.
MgMA
MAH
derived
from
situ
neutralization
reaction
acid
(MA)
oxide
(MgO)
dehydration
MA
respectively.
In
this
paper,
mole
ratio
MgO
performance
EPDM/PP
TPV
was
studied.
With
incorporation
MgO,
mechanical
property
were
improved.
The
result
DMA,
FTIR,
SEM
verified
successful
polymer
chains.
improved
tensile
strength
(12.9
MPa)
elongation
at
break
(583.5%),
increased
R
f
96.2%
r
86.7%
tailoring
MA:MgO
(1:1.5).
Язык: Английский
Accessing a Carboxyl‐Anhydride Molecular Switch‐Mediated Recyclable PECT Through Upcycling End‐of‐Use PET
Angewandte Chemie International Edition,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 6, 2025
Poly(ethylene
terephthalate)
(PET),
with
an
annual
production
of
exceeding
70
million
tons,
is
mainly
utilized
in
disposable
fields
and
subsequently
contribute
to
severe
environmental
pollution.
Conventional
chemical
recycling,
which
typically
involves
depolymerizing
polymer
into
monomers,
limited
due
the
intricate
recycling
process,
excess
using
unrecyclable
solvents
low
conversion.
Inspired
by
protein's
molecular
switches,
we
propose
a
novel
polymer-to-polymer
strategy
based
on
polycondensation
principles
upcycling
waste
PET
high-value
recyclable
poly(ethylene-co-1,4-cyclohexanedimethanol
derivatives
containing
switches.
Upon
deactivating
switch,
acidification
reaction
occurs
within
system,
leading
rapid
controllable
reduction
weight
imbalance
reactive
group.
Conversely,
activating
switch
triggers
ring-closing
that
detaches
acid
anhydrides,
bringing
about
equal
molar
ratio
groups
thereby
facilitating
increase
weight.
By
simply
incorporating
condensation
products
melt
polycondensation,
closed-loop
capability
achieved
without
necessitating
excessive
organic
or
complex
depolymerization
processes.
The
present
study
not
only
presents
pathway
for
end-of-use
but
also
introduces
innovative
concept
switching
recyclability
polymers,
demonstrating
significant
potential
large-scale
implementation.
Язык: Английский
Accessing a Carboxyl‐Anhydride Molecular Switch‐Mediated Recyclable PECT Through Upcycling End‐of‐Use PET
Angewandte Chemie,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 6, 2025
Abstract
Poly(ethylene
terephthalate)
(PET),
with
an
annual
production
of
exceeding
70
million
tons,
is
mainly
utilized
in
disposable
fields
and
subsequently
contribute
to
severe
environmental
pollution.
Conventional
chemical
recycling,
which
typically
involves
depolymerizing
polymer
into
monomers,
limited
due
the
intricate
recycling
process,
excess
using
unrecyclable
solvents
low
conversion.
Inspired
by
protein's
molecular
switches,
we
propose
a
novel
polymer‐to‐polymer
strategy
based
on
polycondensation
principles
upcycling
waste
PET
high‐value
recyclable
poly(ethylene‐
co
‐1,4‐cyclohexanedimethanol
derivatives
containing
switches.
Upon
deactivating
switch,
acidification
reaction
occurs
within
system,
leading
rapid
controllable
reduction
weight
imbalance
reactive
group.
Conversely,
activating
switch
triggers
ring‐closing
that
detaches
acid
anhydrides,
bringing
about
equal
molar
ratio
groups
thereby
facilitating
increase
weight.
By
simply
incorporating
condensation
products
melt
polycondensation,
closed‐loop
capability
achieved
without
necessitating
excessive
organic
or
complex
depolymerization
processes.
The
present
study
not
only
presents
pathway
for
end‐of‐use
but
also
introduces
innovative
concept
switching
recyclability
polymers,
demonstrating
significant
potential
large‐scale
implementation.
Язык: Английский
Development of acrylonitrile–butadiene–styrene (ABS)/natural fiber composite filaments for innovative 3D and 4D printing
Polymer Engineering and Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 16, 2024
Abstract
Fruit
wastes
from
the
agro‐industry
may
be
used
in
preparation
of
polymer/natural
fiber
composites.
In
current
scenario,
there
is
a
growing
need
for
sustainable
materials
that
can
reduce
environmental
impact
while
maintaining
or
enhancing
material
properties.
One
promising
approach
incorporation
natural
fibers
derived
fruit
waste
into
polymers,
which
aligns
with
global
push
toward
eco‐friendly
and
circular
economy
solutions.
This
work
was
aimed
at
development
filaments
acrylonitrile–butadiene–styrene
(ABS)/natural
composites
3D
4D
printing.
The
were
banana
(BAN)
peel,
orange
(ORG)
cinnamon
(CIN),
neem
(NEEM)
leaf
fibers.
rheological,
mechanical,
shape
memory
properties
ABS/BAN
ABS/ORG
compared
those
ABS/CIN
ABS/NEEM
A
slight
decrease
viscosity
observed
addition
to
ABS.
showed
highest
mechanical
good
adhesion
between
printed
layers.
particulate
also
as
pigments,
where
different
types
colors
obtained.
ABS/natural
processed
same
processing
conditions
significantly
increased
result.
use
proved
feasible
preparing
3D/4D
printing
objects.
Highlights
3D/4D‐printed
investigated.
Banana
cinnamon,
used.
Filaments
successfully
ABS
decreased
memory.
Among
composites,
ABS/orange
peel
Язык: Английский