Polymers,
Год журнала:
2024,
Номер
16(24), С. 3584 - 3584
Опубликована: Дек. 21, 2024
Photocurable
materials
offer
a
rapid
transition
from
liquid
to
solid
state,
and
have
recently
received
great
interest
in
the
medical
field.
However,
while
dental
resins
are
very
popular,
only
few
been
developed
for
soft
tissue
repair.
This
study
aims
synthesize
difunctional
methacrylate
monomer
using
dibutyltin
dilaurate
which
is
suitable
photocuring
of
materials.
These
were
compared
with
PhotoBioCure®
(Szczecin,
Poland)
material
similar
molecular
weight,
Mn
~7000
g/mol
on
average.
Infrared
spectroscopy
was
used
monitor
two-step
synthesis
catalyzed
dilaurate,
spectroscopic
chromatographic
methods
determine
chemical
structure
weight
monomers.
Photopolymerization
kinetics
under
varying
light
intensities
explored
nitrogen
atmosphere
representative
The
mechanical
testing
resulting
elastomeric
films
confirmed
tensile
strength
modulus
values
consistent
parameters
range
3–4
MPa.
3D
printability
macromonomers
also
assessed.
Additionally,
cytotoxicity
assessments
cultured
cells
showed
high
cell
viability
(97%)
all
new
Overall,
we
demonstrate
that
monomers
converted
flexible
solids
during
photopolymerization
show
potential
biomedical
applications.
Macromolecular Rapid Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 21, 2025
Abstract
Hexaarylbiimidazole
(HABI)
molecules
have
awakened
a
broad
interest
in
photo‐processing,
super‐resolution
imaging,
photoinduced
self‐healing
materials,
and
photomechanical
hydrogels
due
to
their
excellent
photosensitivity
photo‐induced
cleavage
properties.
In
this
work,
novel
photoswitchable
branched
polyurethanes
(BPU),
which
are
synthesized
by
copolymerizing
HABI
with
glycerol,
isophorone
diisocyanate
(IPDI),
polyethylene
glycol
(PEG
400
),
is
designed.
7‐Diethylamino‐4‐methylcoumarin
(DMCO)
introduced
as
radical
quencher,
can
not
only
avoid
the
hydroxyl
interfering
from
conventional
scavengers
during
polymerization
process
but
also
promote
efficient
quenching
of
TPIR
radicals.
By
optimizing
DMCO
concentration,
content,
high‐quality
lithographic
patterns
achieved
high
film
retention
at
low
exposure
doses.
The
structure
exhibits
superior
solubility
after
compared
previous
crosslinked
systems.
This
work
provides
HABI‐based
polyurethane,
acts
one
potential
candidates
for
UV‐positive
photoresists.
Macromolecular Materials and Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 5, 2025
Abstract
Using
additive
manufacturing
(AM)
technologies
for
the
fabrication
of
advanced
polymeric
objects
is
a
logical
progression
to
realize
their
potential
within
engineering
applications
that
demand
complex
geometries.
Thiol‐X
chemistry
has
presented
itself
as
diverse
and
invaluable
toolkit
accomplish
such,
satisfying
both
processing
requirements
properties
desired
fabricate
range
using
variety
AM
technologies.
The
“click”
nature
many
thiol‐X
reactions,
mechanisms
polymerization,
functional
group
tolerance
orthogonality,
desirable
achievable
with
presents
synergistic
opportunity
few
other
chemistries
can
broadly
facilitate.
As
result,
use
gained
rapid
traction
in
recent
years
it
now
case
are
being
viewed
two
sides
same
coin,
whereby
scope
limitations
whole
system
appreciated.
This
review
highlights
advancements,
status,
scope,
opportunities
achieve
polymers
by
critically
examining
structure‐property‐processing‐performance
relationships
between
different
various
ACS Applied Polymer Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 23, 2025
Leveraging
the
kinetic
selectivity
of
various
thiol-based
chemistries,
sequential
thiol-Michael
and
thiol–ene
reactions
were
applied
semiorthogonally
toward
holographic
recording,
thereby
expanding
available
toolbox
for
developing
thiol–ene-based
optical
recording
media.
In
a
unique
ternary
mixture,
thiol
glycolates
are
highly
favored
kinetically
due
to
higher
stability
therefore
enhanced
reactivity
thiolate
anion
as
compared
with
aliphatic
thiols
in
reaction.
The
glycolate
is
base-catalyzed
react
Michael
acceptor,
i.e.,
an
electron-deficient
double
bond,
form
first-stage
matrix,
leaving
most
unreacted
successive
photopolymerization.
Through
product
ratios
obtained
from
1H
NMR,
high
was
demonstrated
small
molecule
model
studies,
which
significant
excess
loading
monomer
utilized
(up
five-fold
functional
groups).
Furthermore,
two-stage
behavior
evaluated
bulk
material
system
comprised
multifunctional
monomers
through
photorheology.
resultant
films,
robust
elastomers,
exhibit
spatiotemporal
control
photopatterning.
Taking
advantage
decoupled
choice
realize
theoretical
refractive
index
contrast
between
two
stages,
transmission
gratings
recorded
similar
formulations,
yielding
peak-to-mean
0.0064
fidelity
spatial
resolution
even
at
size
scale
620
nm
period.
