Macromolecules,
Год журнала:
2023,
Номер
56(15), С. 5679 - 5697
Опубликована: Июль 21, 2023
Plastics
offer
several
advantages,
but
their
production
and
disposal
processes
have
severe
environmental
implications.
To
overcome
these
issues,
there
is
a
need
to
switch
from
the
linear
circular
economy
by
recycling
plastic
waste
utilizing
renewable
resources
create
bioplastics.
However,
this
challenging
in
case
of
nonbiodegradable
polyolefins
(POs),
which
form
largest
fraction
produced
polymers
least
recycled
one.
Mechanical
recycling,
chemical
PO
bioplastics
are
three
pillars
economy.
Although
mechanical
an
environmentally
economically
viable
option,
it
often
results
degradation
downgrading
POs.
Nonetheless,
innovations
such
as
use
(nano)fillers
or
compatibilization
with
olefin
block
copolymers,
attempt
mitigate
issues.
Furthermore,
development
covalent
adaptable
networks
improves
properties
thermoplastics
provides
recyclable
elastomers.
If
fails
meet
desired
characteristics
recyclate
PO,
other
chemicals
potential
alternative.
retrieving
monomer
ideal
for
achieving
closed-loop
economy,
traditional
approaches
noncatalytic
POs
energy-intensive
lack
specificity.
This
has
been
tried
be
addressed
advancements
catalytic
approaches.
Finally,
biobased
polyolefins,
especially
those
through
emerging
nonbiochemical
approaches,
attractive
alternatives
that
can
integrated
into
existing
petrochemical
plants.
With
comprehensive
perspective
on
academic
industrial
researchers
field
better
contribute
more
sustainable
future.
Chemosphere,
Год журнала:
2023,
Номер
320, С. 138089 - 138089
Опубликована: Фев. 6, 2023
Human
society
has
become
increasingly
reliant
on
plastic
because
it
allows
for
convenient
and
sanitary
living.
However,
recycling
rates
are
currently
low,
which
means
that
the
majority
of
waste
ends
up
in
landfills
or
ocean.
Increasing
upcycling
is
a
critical
strategy
addressing
issues
caused
by
pollution,
but
there
several
technical
limitations
to
overcome.
This
article
reviews
advancements
polymer
technology
aim
improve
efficiency
waste.
In
food
packaging,
natural
polymers
with
excellent
gas
barrier
properties
self-cleaning
abilities
have
been
introduced
as
environmentally
friendly
alternatives
existing
materials
reduce
food-derived
contamination.
Upcycling
valorization
approaches
emerged
transform
into
high-value-added
products.
Recent
development
recyclable
high-performance
plastics
include
design
super
engineering
thermoplastics
chemical
bonds
thermosets
make
them
biodegradable.
Further
research
needed
develop
more
cost-effective
scalable
technologies
address
pollution
problem
through
sustainable
upcycling.
Green Chemistry,
Год журнала:
2022,
Номер
24(11), С. 4363 - 4387
Опубликована: Янв. 1, 2022
Thermosets
have
many
advantages
such
as
excellent
mechanical
properties,
dimensional
stability
and
environmental
resistance,
but
suffer
from
unsustainability
because
they
are
difficult
to
recycle
overdependent
on
petroleum
chemicals.
Molecular Systems Design & Engineering,
Год журнала:
2023,
Номер
8(9), С. 1097 - 1129
Опубликована: Янв. 1, 2023
Typical
examples
of
structural
switchable
functional
groups
triggered
by
photo-,
pH-,
thermal-,
force-,
CO
2
-
or
redox-stimuli
for
constructing
stimuli-responsive
polymers.
Macromolecular Rapid Communications,
Год журнала:
2023,
Номер
44(7)
Опубликована: Янв. 20, 2023
Abstract
The
rapid
increase
in
the
use
of
plastics
and
related
sustainability
issues,
including
depletion
global
petroleum
reserves,
have
rightly
sparked
interest
biobased
polymer
feedstocks.
Thermosets
cannot
be
remolded,
processed,
or
recycled,
hence
reused
because
their
permanent
molecular
architecture.
Vitrimers
emerged
as
a
novel
family
capable
bridging
difference
between
thermoplastic
thermosets.
enable
unique
recycling
strategies,
however,
it
is
still
important
to
understand
where
raw
material
feedstocks
originate
from.
Transesterification
vitrimers
derived
from
renewable
resources
are
massive
opportunity,
limited
research
has
been
conducted
this
specific
vitrimers.
This
review
article
provides
comprehensive
overview
transesterification
produced
monomers.
focus
on
biomass
structural
suitability
with
dynamic
covalent
chemistry,
well
viability
synthetic
methods.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(36)
Опубликована: Май 18, 2023
Abstract
Linear
chains
in
thermoplastics
make
them
relatively
weak
performance
but
inherently
weldable
and
recyclable.
By
contrast,
thermosets
with
permanently
crosslinked
networks
possess
outstanding
mechanical
performance,
thermal,
chemical
stability,
are
unweldable
unrecyclable.
In
the
last
decade,
a
kind
of
thermoplastics‐like
termed
as
vitrimer
has
been
developed
extensive
applications,
which
welding
vitrimers
plays
central
fundamental
role.
Herein,
we
present
current
state
art
discuss
from
broad
picture
chemistry,
physics,
mechanics:
i)
chemistry
mechanics
vitrimers;
ii)
applicability
assessment
methods
for
iii)
design
principles
implement
strategies
to
iv)
effects
conditions
on
strength
toughness;
v)
applications
adhesion
chemically
inert
materials.
Finally,
advantages,
challenges,
open
questions
highlighted,
future
opportunities
mechanics,
tough
welding,
artificial
intelligence
aided
programming
technology,
standard,
so
discussed.
The
development
would
fuse
disciplines
transformative
impact
polymer
industry.
Macromolecules,
Год журнала:
2023,
Номер
56(21), С. 8688 - 8696
Опубликована: Ноя. 3, 2023
Polymers
with
dynamic
covalent
bonds
are
an
exciting
class
of
materials
properties
and
potential
applications
that
rapidly
gain
significant
attention
from
diverse
scientific
communities.
While
the
number
publications
on
this
emerging
topic
increases
exponentially,
navigating
through
literature
reveals
a
series
physical
inconsistencies
in
previously
established
concepts
some
misconceptions
data
analysis
interpretation.
The
current
paper
presents
practices
often
applied
to
characterization
systems
emphasizes
particular
may
lead
critical
divergences
misinterpretations
results.
We
particularly
focus
should
be
avoided
interpretation
stress–relaxation
viscoelastic
estimates
bond
dissociation
energy.
Instead,
we
suggest
using
traditional
approaches
have
been
polymer
for
decades.
Lastly,
emphasize
challenges
full
understanding
microscopic
behavior
vitrimers.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(15), С. 5965 - 5978
Опубликована: Апрель 4, 2024
This
study
presents
the
synthesis
of
a
novel
biobased
epoxy
monomer
derived
from
vanillin
and
cystamine,
incorporating
imine
disulfide
exchangeable
groups
within
its
structure.
A
series
epoxy-based
vitrimers
with
two
simultaneous
exchange
relaxation
processes
have
been
produced
using
this
monomer.
These
mechanisms
operate
without
need
for
any
catalyst.
Four
different
amine
curing
agents
employed
to
achieve
glass
transition
temperatures
around
100
°C
excellent
thermal
stability.
Through
dynamic-mechanical
analyses,
thermomechanical
properties
vitrimeric
characteristics
investigated,
revealing
remarkably
fast
stress
at
relatively
low
significant
creep
below
temperature.
Leveraging
dual
mechanism,
chemical
degradability
these
has
explored
through
accessible
methodologies,
material's
reformation
after
degradation
demonstrated
in
both
cases.
Furthermore,
material
mechanically
recycled,
maintaining
almost
same
properties.
Finally,
materials
used
fabricate
recycle
carbon-fiber-reinforced
composite
reversible
adhesives,
showcasing
their
promising
potential
applications.
