Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(49)
Published: Oct. 18, 2023
Due
to
a
continued
rise
in
the
production
and
use
of
plastic
products,
their
end-of-life
pollution
has
become
pressing
global
issue.
One
biggest
challenges
plastics
recycling
is
separation
different
polymers.
Multi-block
copolymers
(MBCPs)
represent
an
efficient
strategy
for
upcycling
mixed
via
induced
compatibilization,
but
this
approach
limited
by
difficulties
associated
with
synthesis
structural
modification.
In
contribution,
several
synthetic
strategies
are
explored
prepare
MBCPs
tunable
microstructures,
which
were
then
used
as
compatibilizer
additives
upcycle
mixtures
polyolefins
other
plastics.
A
multi-block+
based
on
reactive
telechelic
block
copolymer
platform
was
introduced,
enabled
extension
during
situ
melt
blending
plastics,
leading
better
compatibilizing
properties
well
3D
printing
capability.
This
also
applicable
more
complex
ternary
blends.
The
polymer
multi-block
versatile
show
exciting
opportunities
ACS Sustainable Chemistry & Engineering,
Journal Year:
2025,
Volume and Issue:
13(9), P. 3817 - 3829
Published: Feb. 27, 2025
Polyhydroxyalkanoates
(PHAs)
are
versatile,
biobased
polyesters
that
often
targeted
for
use
as
degradable
thermoplastic
replacements
polyolefins.
Given
the
substantial
chemical
diversity
of
PHA,
their
potential
cross-linked
polymers
could
also
enable
similar
platforms
reversible,
thermosets.
In
this
work,
we
genetically
engineered
Pseudomonas
putida
KT2440
to
synthesize
poly(3-hydroxybutyrate-co-3-hydroxyundecenoate)
(PHBU),
which
contains
both
3-hydroxybutyrate
and
unsaturated
3-hydroxyundecenoate
components.
To
reduce
brittleness
polymer,
physically
blended
PHBU
with
soft
copolymer
poly(3-hydroxydecanonate-co-3-hydroxyundecenoate)
in
mass
ratios
1:3,
1:1,
3:1.
Upon
observing
varying
degrees
immiscibility
by
scanning
electron
microscopy,
installed
dynamic
boronic
ester
cross-links
via
thiol–ene
click
chemistry,
resulted
compatibilized
thermoset
blends
ranging
hard,
medium,
rubber
or
elastomer
thermomechanical
profiles.
These
were
subjected
controlled
biological
degradation
experiments
freshwater
conditions,
achieving
timely
loss
despite
architectures.
Overall,
work
highlights
a
two-component
platform
production
reprocessable
suitable
several
classes
polymer
technologies
from
tailored,
PHA
copolymers.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(52)
Published: Sept. 15, 2023
Vitrimers
are
polymer
networks
with
dynamic
covalent
bonds
that
allow
the
network
to
reconfigure
its
connectivity
while
maintaining
a
constant
number
of
chemical
at
all
temperatures.
The
melt
viscosity
vitrimers
thus
gradually
decreases
temperature.
This
behavior
makes
more
difficult
process
than
typical
thermoplastics
using
conventional
processing
techniques,
such
as
extrusion.
Although
many
strategies
have
been
reported
address
this
issue,
it
remains
challenging
overcome
key
tradeoff
between
improving
processability
or
mechanical
performance.
Herein,
work
presents
new
strategy
for
overcoming
in
context
elastomeric
vitrimers.
approach
entails
cross‐linking
functionalized
low‐glass
transition
(
T
g
)
matrix
an
incompatible
high‐
featuring
pendant
groups
complementary
reactivity.
When
compared
homogeneous
vitrimer,
microphase‐separated
materials
prepared
by
reactive
extrusion
present
improved
tensile
properties
and
creep
resistance
room
temperature
also
exhibiting
enhanced
high
These
consequence
combination
phase
separation
soft
hard
phases,
restriction
reactions
within
interfacial
zones,
judicious
selection
be
use
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(2)
Published: Sept. 28, 2023
Abstract
The
utilization
of
dynamic
cross‐linking
represents
a
highly
promising
approach
in
addressing
the
escalating
issues
plastic
pollution
and
fossil
resource
consumption.
Despite
being
extensively
investigated
over
past
decade,
various
dynamically
cross‐linked
polymers
(DCPs)
predominantly
remain
confined
to
realm
academic
research.
To
serve
as
valuable
material
for
practical
application,
advanced
processing
is
always
essential
all
kinds
materials.
3D
printing
(3DP)
enables
creation
intricate
shapes
layer‐by‐layer
without
relying
on
molds,
thus
integration
3DP
techniques
with
DCPs
holds
significant
potential
enhance
expand
applicability
DCPs.
Here,
an
overview
fundamental
principles
underlying
compatible
are
provided,
namely
photocuring
3DP,
extrusion‐based
laser
sintering‐based
3DP.
Additionally,
comprehensive
summary
representative
research
works
that
specifically
focus
application
each
respective
technique
presented.
performance
mechanism
involved
corresponding
process
thoroughly
discussed
comprehensively
reviewed.
Finally,
existing
challenges
pertaining
further
enhancing
printability,
performance,
efficiency,
etc.,
deliberated
upon,
while
proposing
directions
address
these
concerns.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(49)
Published: Oct. 18, 2023
Due
to
a
continued
rise
in
the
production
and
use
of
plastic
products,
their
end-of-life
pollution
has
become
pressing
global
issue.
One
biggest
challenges
plastics
recycling
is
separation
different
polymers.
Multi-block
copolymers
(MBCPs)
represent
an
efficient
strategy
for
upcycling
mixed
via
induced
compatibilization,
but
this
approach
limited
by
difficulties
associated
with
synthesis
structural
modification.
In
contribution,
several
synthetic
strategies
are
explored
prepare
MBCPs
tunable
microstructures,
which
were
then
used
as
compatibilizer
additives
upcycle
mixtures
polyolefins
other
plastics.
A
multi-block+
based
on
reactive
telechelic
block
copolymer
platform
was
introduced,
enabled
extension
during
situ
melt
blending
plastics,
leading
better
compatibilizing
properties
well
3D
printing
capability.
This
also
applicable
more
complex
ternary
blends.
The
polymer
multi-block
versatile
show
exciting
opportunities
