Solvent Impact on Chemical Processes
Elsevier eBooks,
Год журнала:
2025,
Номер
unknown, С. 66 - 84
Опубликована: Янв. 1, 2025
Язык: Английский
Auto-VTNA: An Automatic VTNA platform for Determination of Global Rate Equations
Опубликована: Март 25, 2024
The
ability
and
desire
to
generate
kinetic
data
has
greatly
increased
in
recent
years,
requiring
more
automated
quantitative
methods
for
analysis.
In
this
work,
an
program
(Auto-VTNA)
is
developed,
simplify
the
analysis
workflow.
Auto-VTNA
solver
allows
all
reaction
orders
be
determined
concurrently,
expediting
process
of
performs
well
on
noisy
or
sparse
sets
can
handle
complex
reactions
involving
changing
orders.
Quantitative
error
facile
visualisation
users
numerically
justify
robustly
present
their
findings.
used
through
a
free
graphical
user
interface
(GUI),
no
coding
knowledge
from
user,
customised
built
if
required.
Язык: Английский
Itaconic acid as an effective biobased platform molecule for vat photopolymerisation additive manufacturing
MATEC Web of Conferences,
Год журнала:
2024,
Номер
406, С. 03013 - 03013
Опубликована: Янв. 1, 2024
The
successful
development
of
renewable
feedstocks
for
monomer
and
oligomer
synthesis
has
remained
limited
in
its
achievable
biobased
content,
often
still
rely
on
toxic
compounds
functionalisation
(e.g.,
acrylates).
As
such,
the
viability
itaconic
acid
as
an
abundant,
cheap,
highly
sustainable
source
free
radical
polymerisation
was
explored
to
overcome
these
issues.
Itaconic
presented
itself
a
versatile
α,β-unsaturated
carbonyl
diacid
with
ability
be
incorporated
into
monomers
via
several
facile
pathways.
Owing
attributes,
novel
system
composed
unsaturated
polyester
castor
oil
derived
were
developed
used
alongside
isobornyl
methacrylate
commercially
available
reactive
diluent
additive
manufacturing.
This
demonstrated
effective
combination
achieve
tailorable
resins
masked
stereolithography
manufacturing
desirable
mechanical
properties,
whilst
maintaining
high
sustainability.
Язык: Английский
Synthesis and chemoselective crosslinking of functionalized polyesters from bio‐based epoxides and cyclic anhydrides
Journal of Polymer Science,
Год журнала:
2022,
Номер
61(4), С. 311 - 322
Опубликована: Окт. 24, 2022
Abstract
Biomass
derivable
epichlorohydrin
undergoes
ring‐opening
copolymerization
with
either
succinic
or
itaconic
anhydride
(both
biosourcable)
under
standard
laboratory
conditions
using
metal‐based
an
entirely
organic
initiator
to
form
highly
functionalized,
low
molecular
weight
polyesters.
The
linear
polyesters
obtained
from
and
contain
both
alkyl
chlorides
α,β‐unsaturated
esters
can
be
crosslinked
insoluble
resins
by
treatment
di‐
tetra‐functional
amines
thiols.
Crosslinking
predominately
occurs
through
the
whilst
crosslinking
thiols
allowing
synthesis
of
polyester
derived
complementary
controllable
functionalities.
Язык: Английский
Reaction Optimization for Greener Chemistry with a Comprehensive Spreadsheet Tool
Molecules,
Год журнала:
2022,
Номер
27(23), С. 8427 - 8427
Опубликована: Дек. 2, 2022
Green
chemistry
places
an
emphasis
on
safer
chemicals,
waste
reduction,
and
efficiency.
Processes
should
be
optimized
with
green
at
the
forefront
of
decision
making,
embedded
into
research
earliest
stage.
To
assist
in
this
endeavor,
we
present
a
spreadsheet
that
can
used
to
interpret
reaction
kinetics
via
Variable
Time
Normalization
Analysis
(VTNA),
understand
solvent
effects
linear
solvation
energy
relationships
(LSER),
calculate
greenness.
With
information,
new
conditions
explored
silico,
calculating
product
conversions
metrics
prior
experiments.
The
application
tool
was
validated
literature
case
studies.
Reaction
performance
predicted
then
confirmed
experimentally
for
examples
aza-Michael
addition,
Michael
amidation.
combined
analytical
package
presented
herein
permits
thorough
examination
chemical
reactions,
so
variables
control
understood,
optimized,
made
greener
education
purposes.
Язык: Английский
Synthesis of Renewable and Seawater-Degradable Polyesters Based on a Fully Biobased Diester
Опубликована: Янв. 1, 2024
The
design
and
development
of
biobased
plastics
that
can
degrade
in
seawater
is
a
potential
approach
to
address
the
pollution
fossil
plastics.
Herein,
N,N'-pentamethylene-bis(pyrrolidone-4-methyl
carboxylate)(PBPC),
diester
with
two
pyrrolidone
rings,
was
synthesized
from
renewable
1,5-pentanediamine
dimethyl
itaconate.
PBPC
polymerized
three
α,ω-diols
prepare
homopolyesters
number-average
molecular
weight
(Mn)
around
25
kDa.
These
amorphous
presented
remarkable
UV
shielding
abilities
compared
polylactic
acid
(PLA)
poly(butylene
succinate)(PBS).
Incubation
experiments
artificial
for
150
days
indicated
based
on
exhibited
rapid
seawater-degradability.
Then,
copolymerized
1,4-butanediol
terephthalic
series
copolyesters
Mn
20
introduction
into
terephthalate)(PBT)
resulted
elevated
toughness
sensitivity
seawater-degradation.
Depending
composition
PBPC,
thermal,
mechanical,
degradation
rate
were
adjustable.
Overall,
PBPC-based
polyesters
are
promising
alternatives
commercial
packaging
materials
improving
renewability
raw
achieving
degradation.
Язык: Английский
Synthesis of Renewable and Seawater-degradable Polyesters Based on a Fully Biobased Diester
Polymer Degradation and Stability,
Год журнала:
2024,
Номер
unknown, С. 111015 - 111015
Опубликована: Сен. 1, 2024
Язык: Английский
Poly(glycerol itaconate) Crosslinking via the aza-Michael Reaction—A Preliminary Research
Materials,
Год журнала:
2023,
Номер
16(23), С. 7319 - 7319
Опубликована: Ноя. 24, 2023
In
unsaturated
glycerol
polyesters,
the
C=C
bond
is
present.
It
makes
it
possible
to
carry
out
post-polymerisation
modification
(PPM)
reactions,
such
as
aza-Michael
addition.
This
reaction
can
conduct
crosslinking
under
in-situ
conditions
for
tissue
engineering
regeneration.
Until
now,
no
description
of
use
addition
has
been
described.
work
aims
crosslink
synthesised
poly(glycerol
itaconate)
(PGItc;
P3),
polyester
from
itaconic
acid
(AcItc),
and
(G).
The
PGItc
syntheses
were
performed
in
three
ways:
without
a
catalyst,
presence
p-toluenesulfonic
(PTSA),
zinc
acetate
(Zn(OAc)2).
obtained
with
Zn(OAc)2
(150
°C,
4
h,
G:AcItc
=
2:1)
was
used
additions.
Crosslinking
reactions
conducted
each
five
aliphatic
diamines:
1,2-ethylenediamine
(1,2-EDA;
A1),
1,4-butanediamine
(1,4-BDA;
A2),
1,6-hexanediamine
(1,6-HDA;
A3),
1,8-octanediamine
(1,8-ODA;
A4),
1,10-decanediamine
(1,10-DDA;
A5).
Four
ratios
proton
amine
group:
investigated.
maximum
temperature
time
measured
select
best
product's
application.
FTIR,
1H
NMR,
DSC,
TG
analysis
crosslinked
products
also
Язык: Английский