Macromolecules,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 17, 2024
New
advanced
iodonium
salts
based
on
stilbene
chromophores
with
significantly
improved
photoinitiating
properties
are
presented.
The
extended
conjugated
double
bond
system
provides
major
improvement
in
quantum
yield
of
superacid
generation
(up
to
10
times
higher
compared
benzylidene-based
salts)
while
maintaining
absorption
UV-A
and
visible
light.
newly
developed
exhibit
activity
toward
cationically
polymerizable
monomers
such
as
cyclic
epoxy
(e.g.,
3,4-epoxycyclohexylmethyl
3,4-epoxycyclohexane-carboxylate
(CADE)),
oxetanes
bis[1-ethyl(3-oxetanyl)]methyl
ether
(OXT-221))
glycidyl
diglycidyl
bisphenol
A
(DGEBA))
under
the
irradiation
by
light-emitting
diodes
(LEDs)
emitting
at
365,
405
even
430
nm,
no
additives.
Commonly
used
diaryliodonium
photoinitiators
inactive
those
wavelengths.
Moreover,
some
new
also
able
photoinitiate
free
radical
photopolymerization
acrylate
monomers,
trimethylolpropane
triacrylate
(TMPTA).
Such
high
allows
these
be
one-component
cationic
vat
3D
printing
nanocomposites
ambient
temperature.
resolution
prints
was
limited
mainly
DLP
printer
slight
signs
overpolymerization.
Materials Advances,
Journal Year:
2023,
Volume and Issue:
5(2), P. 788 - 805
Published: Dec. 14, 2023
This
study
presents
novel
photoinitiating
systems
based
on
diaryliodonium
salt
(IOD)
and
1-amino-4-methyl-6-styrylnaphthalene-2-carbonitrile
derivatives
developed
as
universal
IOD
photosensitizers.
