Upcycling Poly(vinyl chloride) and Polystyrene Plastics Using Photothermal Conversion
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 13, 2025
Poly(vinyl
chloride)
(PVC)
and
polystyrene
(PS)
are
among
the
least
recycled
plastics.
In
this
work,
we
developed
a
simple
novel
strategy
to
valorize
PVC
PS
plastics
via
photothermal
conversion
(1-chloroethyl)benzene,
commodity
chemical
with
excellent
versatility.
As
is
known
release
HCl
gas
decompose
into
conjugated
polyenes,
envisioned
dual
role
for
While
in
situ-generated
serves
as
chlorine
source,
resulting
dehydrochlorinated-PVC
(DHPVC)
functions
agent
accelerate
hydrochlorination
of
styrene.
We
converted
styrene
up
89%
(1-chloroethyl)benzene
less
than
1
h
white
light
irradiation.
Subsequent
nucleophilic
substitution
on
chloro-adduct
formed
1-phenylethanol
(a
fragrance
additive)
fendiline
heart
disease
drug)
high
yields.
The
system
applied
various
alkenes
compatible
post-consumer
waste
plasticizers.
Ultimately,
upcycling
photothermally
achieved
84%
under
LED
h,
co-upcycling
42%
yield
focused
sunlight
irradiation
just
4
min.
Язык: Английский
Co-recycling of plastics and other waste materials
Опубликована: Апрель 28, 2025
Язык: Английский
Tuning the Thermal Properties of Polymethacrylates With Bicyclobutane Monomers
Journal of Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
ABSTRACT
Developing
novel
yet
recyclable
plastics
is
necessary
as
society
advances
and
increases
reliance
on
materials.
Using
new
classes
of
monomers
enables
the
synthesis
unprecedented
polymers
for
applications.
Here,
we
report
copolymerization
with
bicyclo[1.1.0]butane
to
make
strained
backbone
units
analyze
thermal
property
changes
based
%
incorporation
monomers.
We
discover
that
even
low
(5%–20%)
methyl
bicyclobutane‐1‐carboxylate
(MBC)
poly(methyl
methacrylate)
(PMMA)
degradation
temperature
while
decreasing
glass
transition
temperature.
Efficient
depolymerization
achieved
copolymers
20%
or
fewer
MBC
under
photothermal
conversion.
Other
comonomers
(2‐methoxyethyl
methacrylate
oligo(ethylene
glycol)
monomethyl
ethyl
are
also
copolymerized
MBC,
assess
in
their
properties,
including
lower
critical
solution
temperatures
(LCSTs).
Our
work
expands
understanding
how
monomer
plays
a
role
copolymerization,
characteristics,
copolymers.
Язык: Английский