Journal of Polymer Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 26, 2024
Abstract
Chemical
recycling
of
polymers
to
initial
monomers
(CRM)
has
emerged
as
an
advanced
solution
for
waste
plastic
management.
In
particular,
developing
promising
catalytic
methods
are
a
crucial
issue.
this
work,
focusing
on
the
closed‐loop
Nylon‐6
(PA6)
caprolactam
(CPL),
phosphazene
base
t
‐BuP
4
is
exploited
green
organocatalyst.
The
versatility
system
confirmed
by
calculation
activation
energy,
well
effective
and
selective
depolymerization
process.
Meanwhile,
catalyst
also
displays
good
recyclability
scalability.
Experimental
kinetic
data
reveal
that
mechanism
involved
random
chain
scission
after
interaction
amide.
This
work
provides
useful
strategy
treatment
post‐consumer
PA6.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 17, 2024
The
pursuit
of
sustainable
practices
through
the
chemical
recycling
polyamide
wastes
holds
significant
potential,
particularly
in
enabling
recovery
a
range
nitrogen-containing
compounds.
Herein,
we
report
novel
strategy
to
upcycle
tertiary
amines
with
assistance
H
Science Advances,
Journal Year:
2025,
Volume and Issue:
11(4)
Published: Jan. 22, 2025
Controlling
the
reactivity
of
bonds
along
polymer
chains
enables
both
functionalization
and
deconstruction
with
relevance
to
chemical
recycling
circularity.
Because
substrate
is
a
macromolecule,
however,
understanding
effects
chain
conformation
on
emerges
as
important
yet
underexplored.
Here,
we
show
how
oxy-functionalization
chemically
recyclable
condensation
polymers
affects
acidolysis
monomers
through
control
over
distortion
interaction
energies
in
rate-limiting
transition
states.
Oxy-functionalization
polydiketoenamines
at
specific
sites
either
amine
or
triketone
monomer
segments
increased
rates
by
more
than
three
orders
magnitude,
opening
door
efficient
linear
architectures.
These
insights
substantially
broaden
scope
applications
for
circular
manufacturing
economy,
including
adhesives
diverse
range
surfaces.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
147(9), P. 7788 - 7798
Published: Feb. 20, 2025
It
remains
a
long-standing
challenge
for
chemical
recycling
of
polyhydroxyalkanoates
(PHAs)
to
propiolactone-based
monomers
due
the
high
ring
strain
and
many
inevitable
side
reactions.
In
this
contribution,
novel
α-spiro-cyclohexyl-propiolactone
(SHPL)
has
been
designed
with
reactivity
toward
ring-opening
polymerization
even
at
catalyst
loading
<1
ppm.
The
resulting
poly(3-hydroxy-2-spiro-cyclohexylpropionate)
(P3HSHP)
exhibited
thermal
stability
Td
364
°C
Tm
272
°C.
Meanwhile,
it
could
be
depolymerized
back
SHPL
in
86%
yield
without
decarboxylation
or
elimination
products.
Notably,
exploited
construct
high-performance
thermoplastic
elastomers
(TPEs)
via
one-pot
copolymerization
ε-caprolactone
(CL).
Particularly,
gradient
P(CL2000-grad-SHPL500)
showcased
an
ultimate
tensile
strength
58.8
±
4.0
MPa,
stretchability
1959
53%,
record
toughness
600
MJ/m3,
elastic
recovery
(>90%).
This
superior
performance
advance
development
new
sustainable
TPEs.
Polymer Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Both
monomer
and
copolymer
synthesis
proved
scalable.
Polymers’
properties
were
excellent
they
could
react
with
electrophiles
to
produce
diverse
functional
materials.
Macromolecules,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 14, 2025
Replacement
of
petroleum-derived
monomers
with
renewable
alternatives
is
an
integral
part
the
sustainable
polymer
framework.
Research
in
this
area
involves
search
for
bio-based
or
recycled
starting
materials
traditional
polymers,
as
well
investigations
into
new
accessible
from
feedstocks.
Focusing
on
latter,
we
studied
properties
polyamides
synthesized
γ-methyl-ε-caprolactam
through
anionic
ring-opening
polymerization
by
activated
monomer
mechanism.
The
amorphous
homopolymer
presents
high
stiffness
(Young's
modulus,
≈3
GPa),
strength
(stress
at
break,
≈80
MPa)
and
toughness
under
dry
(low
humidity)
conditions,
ductility
(strain
≈1100%)
humid
environments,
optical
clarity,
excellent
processability
due
to
its
non-crystallizable
nature
solubility
common
organic
solvents.
Copolymerization
ε-caprolactam
allows
tailoring
mechanical
crystallinity
resultant
copolymers
provides
opportunities
advanced
manufacturing
other
applications.
