ACS Applied Polymer Materials,
Journal Year:
2021,
Volume and Issue:
3(9), P. 4325 - 4346
Published: Aug. 23, 2021
The
ubiquitous
use
of
plastics
has
been
driven
by
their
combination
low
cost
and
properties,
but
these
attributes
directly
challenge
waste
management
schemes
for
plastic
recycling.
Some
postconsumer
recycling
programs
are
now
nearly
50
years
old,
a
significant
fraction
still
finds
landfills
or
other
dumping
strategies
at
end
life.
With
the
growing
concern
regarding
waste,
especially
ocean
plastics,
there
is
need
innovation
alternative
economic
translation
to
valued
product(s)
that
will
promote
efficient
circular
utilization.
This
review
first
describes
technical
hurdles
associated
with
then
it
focuses
on
providing
an
overview
emergent
recover
through
new
polymer
design,
processes,
chemical
transformations
value-added
products.
Specific
challenges
discussed
include
sorting
separations,
product
variability
including
additives,
high
efficiency/low
in
which
existing
petrochemical
industry
can
produce
virgin
polymers,
particular
polyolefins.
Although
wide
variety
have
demonstrated
both
mechanical
means,
commercial
success
different
generally
limited
either
performance,
large
variance
key
metrics,
economics
where
products
match
performance
materials
process
expensive.
Successful
capture
likely
depend
incentives
government
regulations.
Chemical Reviews,
Journal Year:
2021,
Volume and Issue:
121(3), P. 1716 - 1745
Published: Jan. 4, 2021
Dynamic
covalent
polymer
networks
(DCPN)
have
historically
attracted
attention
for
their
unique
roles
in
chemical
recycling
and
self-healing,
which
are
both
relevant
sustainable
societal
development.
Efforts
these
directions
intensified
the
past
decade
with
notable
progress
newly
discovered
dynamic
chemistry,
fundamental
material
concepts,
extension
toward
emerging
applications
including
energy
electronic
devices.
Beyond
that,
values
of
DCPN
discovering/designing
functional
properties
not
offered
by
classical
thermoplastic
thermoset
polymers
recently
gained
traction.
In
particular,
bond
exchangeability
has
shown
unparalleled
design
versatility
various
areas
shape-shifting
materials/devices,
artificial
muscles,
microfabrication.
Going
beyond
this
basic
exchangeability,
molecular
mechanisms
to
manipulate
network
topologies
(topological
transformation)
led
opportunities
program
polymers,
concepts
such
as
living
topological
isomerization.
review,
we
provide
an
overview
above
particular
focuses
on
strategies
exploitation
properties.
Based
this,
point
out
remaining
issues
offer
perspectives
how
class
materials
can
shape
future
ways
that
complementary
polymers.
Science,
Journal Year:
2021,
Volume and Issue:
373(6550), P. 66 - 69
Published: July 1, 2021
Plastics
have
revolutionized
modern
life,
but
created
a
global
waste
crisis
driven
by
our
reliance
and
demand
for
low-cost,
disposable
materials.
New
approaches
are
vital
to
address
challenges
related
plastics
heterogeneity,
along
with
the
property
reductions
induced
mechanical
recycling.
Chemical
recycling
upcycling
of
polymers
may
enable
circularity
through
separation
strategies,
chemistries
that
promote
closed-loop
inherent
macromolecular
design,
transformative
processes
shift
life-cycle
landscape.
Polymer
schemes
lower-energy
pathways
minimal
environmental
impacts
compared
traditional
chemical
The
emergence
industrial
adoption
is
encouraging,
solidifying
critical
role
these
strategies
in
addressing
fate
driving
advances
next-generation
materials
design.
The Science of The Total Environment,
Journal Year:
2021,
Volume and Issue:
769, P. 144483 - 144483
Published: Jan. 7, 2021
A
large
portion
of
plastic
produced
each
year
is
used
to
make
single-use
packaging
and
other
short-lived
consumer
products
that
are
discarded
quickly,
creating
significant
amounts
waste.
It
important
such
waste
be
managed
appropriately
in
line
with
circular-economy
principles.
One
option
for
managing
chemical
recycling
via
pyrolysis,
which
can
convert
it
back
into
feedstock
then
manufacture
virgin-quality
polymers.
However,
given
this
an
emerging
technology
not
yet
widely
practice,
clear
if
pyrolysis
plastics
sustainable
on
a
life
cycle
basis
how
compares
management
options
as
well
the
production
virgin
plastics.
Therefore,
study
uses
assessment
(LCA)
compare
environmental
impacts
mixed
(MPW)
established
alternatives:
mechanical
energy
recovery.
Three
LCA
studies
have
been
carried
out
under
three
perspectives:
waste,
product
combination
two.
To
ensure
robust
comparisons,
estimated
using
two
impact
methods:
Environmental
footprint
ReCiPe.
The
results
suggest
has
50%
lower
climate
change
use
than
recovery
option.
MPW
similar
quality
recyclate
taken
account.
Furthermore,
recycled
by
significantly
(−0.45
vs
1.89
t
CO2
eq./t
plastic)
equivalent
made
from
fossil
resources.
higher
recycling,
Sensitivity
analyses
show
some
assumptions
notable
effects
results,
including
assumed
geographical
region
its
mix,
carbon
conversion
efficiency
quality.
These
will
interest
chemical,
industries,
policy
makers.
Science,
Journal Year:
2022,
Volume and Issue:
378(6616), P. 207 - 211
Published: Oct. 13, 2022
Mixed
plastics
waste
represents
an
abundant
and
largely
untapped
feedstock
for
the
production
of
valuable
products.
The
chemical
diversity
complexity
these
materials,
however,
present
major
barriers
to
realizing
this
opportunity.
In
work,
we
show
that
metal-catalyzed
autoxidation
depolymerizes
comingled
polymers
into
a
mixture
oxygenated
small
molecules
are
advantaged
substrates
biological
conversion.
We
engineer
robust
soil
bacterium,
Pseudomonas
putida,
funnel
compounds
single
exemplary
product,
either
β-ketoadipate
or
polyhydroxyalkanoates.
This
hybrid
process
establishes
strategy
selective
conversion
mixed
useful
