Macromolecules,
Год журнала:
2024,
Номер
57(4), С. 1546 - 1555
Опубликована: Фев. 11, 2024
A
series
of
biobased
alipharomatic
polyesters
using
vanillin-derived
bifunctional
hydroxy-aldehyde
monomers
(M1)s
as
the
starting
materials
are
synthesized
through
direct
dehydrogenative
polycondensation
with
commercially
available
Milstein
catalyst.
The
thermal
properties
resulting
P(M1)s
can
be
precisely
tuned
by
altering
alkylene
length
monomers,
a
maximum
Tg
value
reaching
37.9
°C.
Compared
to
reported
vanillic
acid-based
polyesters,
synthesis
M1
is
less
labor-intensive,
and
polymerization
conditions
milder
than
those
conventional
polycondensation.
Additionally,
experimental
results
mechanism
elucidations
revealed
four
different
types
ester
linkages
in
P(M1)
chain.
ruthenium
dihydride
complex
has
been
identified
true
active
species
required
for
promoting
into
polyesters.
Moreover,
this
catalytic
system
also
exhibits
depolymerization
capability
toward
polyester
back
diol
(M2),
which
then
repolymerized
P(M2)
an
identical
structure
that
P(M1),
thus
demonstrating
rare
example
where
two
yield
same
polymer
product.
This
study
presents
green
economical
approach
preparation
recycling
widely
used
Since
the
first
artificial
plastic
was
introduced,
worldwide
production
and
consumption
of
have
been
continuously
increasing.
However,
improper
treatment
has
made
a
large
amount
waste
plastics
flow
into
environment.
These
cannot
be
decomposed
in
natural
environment
but
can
divided
small
pieces,
i.e.,
microplastics
(MPs),
under
long-term
physical,
chemical,
or
biological
effects;
thus,
bringing
severe
dangers
for
ecological
human
health.
Effective
MP
pollution
is
quite
urgent.
current
research
on
MPs
still
focuses
enrichment
blocking
neglects
to
address
from
perspectives
policy
regulation,
source
substitution,
recycling.
Here,
we
comprehensively
overviewed
solutions
pollution,
including
reduction
usage
plastics,
development
substitutable
such
as
biobased
long-life/durable
recycling
well
remediation
strategies
existing
We
hope
that
more
novel
technologies
will
developed
successfully
combat
safeguard
planet's
health
ecosystem.
Macromolecules,
Год журнала:
2024,
Номер
57(4), С. 1546 - 1555
Опубликована: Фев. 11, 2024
A
series
of
biobased
alipharomatic
polyesters
using
vanillin-derived
bifunctional
hydroxy-aldehyde
monomers
(M1)s
as
the
starting
materials
are
synthesized
through
direct
dehydrogenative
polycondensation
with
commercially
available
Milstein
catalyst.
The
thermal
properties
resulting
P(M1)s
can
be
precisely
tuned
by
altering
alkylene
length
monomers,
a
maximum
Tg
value
reaching
37.9
°C.
Compared
to
reported
vanillic
acid-based
polyesters,
synthesis
M1
is
less
labor-intensive,
and
polymerization
conditions
milder
than
those
conventional
polycondensation.
Additionally,
experimental
results
mechanism
elucidations
revealed
four
different
types
ester
linkages
in
P(M1)
chain.
ruthenium
dihydride
complex
has
been
identified
true
active
species
required
for
promoting
into
polyesters.
Moreover,
this
catalytic
system
also
exhibits
depolymerization
capability
toward
polyester
back
diol
(M2),
which
then
repolymerized
P(M2)
an
identical
structure
that
P(M1),
thus
demonstrating
rare
example
where
two
yield
same
polymer
product.
This
study
presents
green
economical
approach
preparation
recycling
widely
used
