Polymer Journal,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 23, 2024
Abstract
We
prepared
the
dialkynyl
monomers
1,4-butanediol
dipropiolate,
meso
-erythritol
and
isomannide
dipropiolate
(IMDP)
via
reactions
of
1,4-butanediol,
-erythritol,
isomannide,
respectively,
with
propiolic
acid.
The
thiol-Michael
polyaddition
three
several
dithiols,
namely,
1,4-butanedithiol,
ethylene
bis(thioglycolate),
3,6-dioxa-1,8-octanedithiol,
D,L-dithiothreitol,
D-2,5-di-O-(2-mercaptoacetate)-1,4:3,6-dianhydromannitol
(MAIM),
proceeded
in
chloroform,
tetrahydrofuran,
or
N,N
-dimethylformamide
(25
°C)
using
triethylamine
as
catalyst
to
give
unsaturated
poly(ester-thioether)s
expected
structures
(
M
n
,
2.4
×
10
3
22.6
;
molecular
dispersity
index
[
w
/
],
1.26–2.00).
All
poly(ester-thioester)s
had
single
glass-transition
temperature
T
g
)
values
between
−27
49
°C.
While
rigid
main
chains
improved
glass
transition
temperature,
all
showed
apparent
enzymatic
hydrolysis
by
lipase
but
low
biodegradability
biodegradation
tests
activated
sludge.
poly(IMDP-
alt
-MAIM)
highest
biobased
degree
(55%)
(10%)
(49
°C),
suggesting
that
dianhydrosugars
are
suitable
biomass
for
improving
well
thermal
properties.
Polymers,
Journal Year:
2023,
Volume and Issue:
16(1), P. 87 - 87
Published: Dec. 27, 2023
Poly(lactic
acid)
(PLA)
is
a
polyester
attracting
growing
interest
every
year
in
different
application
fields,
such
as
packaging,
cosmetics,
food,
medicine,
etc.
Despite
its
significant
advantages,
it
has
low
elasticity
that
may
hinder
further
development
and
corresponding
rise
volume
of
consumption.
This
review
opens
discussion
basic
approaches
to
PLA
plasticization.
These
considerations
include
copolymerization
blending
with
flexible
polymers,
introducing
oligomers
low-molecular
additives,
well
structural
modification.
It
was
demonstrated
each
approach
simplicity
cost,
but
disadvantages,
including
complex
processing
the
need
for
additional
reagents.
According
analysis
approaches,
concluded
optimal
option
copolymers
additives
obtained
via
reactive
mixing
blends
other
polymers.
Advanced Industrial and Engineering Polymer Research,
Journal Year:
2023,
Volume and Issue:
7(4), P. 405 - 427
Published: Sept. 21, 2023
The
recent
interest
in
multifunctional
materials
with
tailorable
performances
led
to
the
formulation
of
novel
polymer
blends,
enhanced
properties
respect
traditional
plastics
and
showing
economical
advantages
compared
synthesis
new
polymers.
However,
blends
are
immiscible
most
cases,
proper
compatibilization
is
therefore
needed
obtain
an
alloy
suitable
performances.
Beside
approaches
(i.e.,
addition
graft
or
branched
copolymers,
reactive
compatibilization),
a
technique
has
recently
emerged,
based
on
insertion
micro-
nanostructured
inorganic
fillers
within
blends.
Therefore,
aim
this
review
give
overview
about
role
played
by
nanofillers
alloys.
A
survey
important
papers
literature
topic
will
be
presented,
trying
correlate
microstructural
features
nanofilled
their
physical
properties.
After
introduction
general
aspects
alloys
Chapter
1,
relevant
strategies
presented
2,
particular
emphasis
induced
fillers.
3
focused
nanofiller
compatibilization,
several
examples
thermoplastic,
thermosetting
elastomeric
presented.
Considering
increasing
importance
biopolymers
modern
industry,
4
it
shown
how
could
successfully
applied
also
bioplastics
Due
environmental
concerns
waste
management
difficulties
sorting
operations,
5
demonstrated
that
nanomodification
recycled
can
lead
blend
recyclates
good
compatibility
key
future
perspectives
summarized
6.
Journal of Polymers and the Environment,
Journal Year:
2023,
Volume and Issue:
32(2), P. 749 - 762
Published: Aug. 11, 2023
Abstract
This
work
addresses
the
potential
of
two
biobased
terpenoids,
linalyl
acetate
and
geranyl
acetate,
as
environmentally
friendly
monomeric
plasticizers
for
polylactide
(PLA).
Plasticized
formulations
PLA
containing
10
wt.%
20
terpenoids
were
melt-compounded
in
a
twin-screw
co-rotating
extruder
and,
subsequently,
processed
by
injection
moulding
further
characterization.
In
addition,
reactive
extrusion
process
(REX)
was
carried
out
on
plasticized
with
dicumyl
peroxide
to
anchor
plasticizer
molecules
into
backbone.
Both
led
remarkable
plasticization
effect
PLA,
noticeable
increase
ductile
properties.
particular,
elongation
at
break
around
4.7%,
improved
values
above
230%
all
formulations,
even
low
terpenoid
concentration
wt.%.
Terpenoids
also
provide
increased
crystallinity
because
polymers
chains
have
more
mobility
are
readily
arranged.
observed
shifting
cold
crystallization
lower
temperatures.
As
other
plasticizers,
clear
decrease
glass
transition
temperature
from
61.5
°C
(neat
PLA),
40
obtained.
The
obtained
show
high
since
efficiency
these
is
very
high,
thus
leading
new
toughened-PLA
ductility.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(21), P. 3015 - 3015
Published: Oct. 28, 2024
Nowadays,
plastic
contamination
worldwide
is
a
concerning
reality
that
can
be
addressed
with
appropriate
society
education
as
well
looking
for
innovative
polymeric
alternatives
based
on
the
reuse
of
waste
and
recycling
circular
economy
point
view,
thus
taking
into
consideration
future
world
without
quite
impossible
to
conceive.
In
this
regard,
in
review,
we
focus
sustainable
materials,
biodegradable
bio-based
polymers,
additives,
micro/nanoparticles
used
obtain
new
environmentally
friendly
polymeric-based
materials.
Although
polymers
possess
poorer
overall
properties
than
traditional
ones,
they
have
gained
huge
interest
many
industrial
sectors
due
their
inherent
biodegradability
natural
environments.
Therefore,
several
strategies
been
proposed
improve
extend
applications.
Blending
strategies,
development
composites
nanocomposites,
shown
promising
perspectives
improving
performances,
emphasizing
biopolymeric
blend
formulations
micro
nanoparticles
produce
fully
The
Review
also
summarizes
recent
developments
blends,
composites,
nanocomposite
plasticization,
particular
naturally
derived
plasticizers
chemical
modifications
increase
compatibility
matrices.
current
state
art
most
important
reviewed,
mainly
focusing
synthesis
processing
methods
scalable
sector,
such
melt
solution
blending
approaches
like
melt-extrusion,
injection
molding,
film
forming
electrospinning,
among
others,
neglecting
degradation
processes.
Polymer,
Journal Year:
2024,
Volume and Issue:
308, P. 127361 - 127361
Published: July 5, 2024
This
study
focuses
on
developing
environmentally
friendly
plasticized
poly(lactide)
(PLA)
formulations
using
tartaric
acid
and
α-tocopherol
at
20
wt%.
The
extrusion
injection
molding
processes
demonstrated
the
industrial
applicability
of
these
plasticizers.
Mechanical
tests
revealed
positive
results
for
tartrate-based
plasticizers,
with
elongation
break
surpassing
220
%,
while
succinate
achieved
170
%.
However,
acetate
showed
limited
PLA
plasticization.
Field
emission
scanning
electron
microscopy
confirmed
plasticization
in
fractured
surfaces.
Thermal
analysis
indicated
a
reduction
PLA's
glass
transition
temperature
(Tg)
from
60
°C
to
around
30
underscoring
tartrates'
exceptional
efficiency.
cold
crystallization
(Tcc)
decreased
all
samples
due
enhanced
chain
mobility.
Thermomechanical
dimensional
shrinkage,
dimethyl
tartrate
(DMT)
causing
less
pronounced
effects.
Generally,
tartrates
yielded
superior
properties,
attributed
their
lower
molecular
weight
compared
α-tocopherol-derived
Notably,
plasticizers
employed
are
an
eco-friendly
approach
improve
processability
enhancing
ductile
properties.
ACS Applied Polymer Materials,
Journal Year:
2024,
Volume and Issue:
6(15), P. 8997 - 9007
Published: July 25, 2024
Eco-friendly
blends
of
polylactic
acid
(PLA)/polyhydroxybutyrate
(PHB)
have
been
developed
with
the
use
a
sustainable
plasticizer,
namely
epoxidized
soybean
oil
methyl
ester
(ESOME).
While
PLA,
PHB,
and
their
are
highly
valued
for
bio-origin
compostability
at
end
lifecycle,
enhancing
flexibility
improved
processability
broadening
range
applications
is
an
ongoing
challenge.
For
this
reason,
we
present
formulation
PLA/PHB
varying
ESOME
concentrations,
processed
by
extrusion
compression
molding.
The
structural,
chemical,
rheological,
morphological
thermal
properties
without
thoroughly
investigated
through
complementary
techniques.
addition
causes
remarkable
increase
in
overall
mechanical
performance
blends,
as
well
significant
enhancement
oxygen
barrier
properties.
Migration
analysis
to
dry
food
simulant
reveals
that
it
below
acceptable
limit,
up
7.5%
wt
%
ESOME.
Based
on
ranking
all
prepared
PLA/PHB/ESOME
respect
using
TOPSIS
(Technique
Order
Performance
Similarity
Ideal
Solution)
analysis,
PLA/PHB/7.5
was
found
be
most
prominent
produced
packaging
applications.
effective
integration
improvement
pave
way
adoption
sector,
aligning
sustainability
goals
environmentally
conscious
future.
