The
objective
of
this
doctoral
thesis
is
the
study
and
development
materials
based
on
polylactic
acid
(PLA),
with
aim
improving
its
properties
for
applicability
in
various
industrial
sectors.This
focuses
modification
inherent
brittleness
stiffness
PLA
by
incorporating
different
materials,
such
as
plasticizers
derived
from
epoxidized
vegetable
oils
maleinized
linseed
oil
called
MLO.In
addition,
creation
binary
blends
higher
ductility
polymers
polycarbonate
(PC)
polystyrene-b-(ethylene-ranbutylene)-b-styrene
(SEBS)
investigated,
inclusion
lactic
oligomers
(OLA)
monoterpenes
are
explored
strategies
to
improve
PLA.This
research
aims
provide
advanced
sustainable
solutions
applications
that
demand
improved
characteristics.In
current
context
polymer
industry,
search
environmentally
friendly
has
taken
an
outstanding
role.This
growing
environmental
awareness
prompted
in-depth
innovative
meet
sustainability
standards
and,
at
same
time,
offer
exceptional
performance.Within
framework,
present
immersed
evaluation
promising
alternatives
plasticizers,
oligomers,
compatibilizers
or
other
blends.The
first
area
incorporation
MLO
a
compatibilizing
agent
composed
(PLA)
styrene-b-(ethylene-ranbutylene)-b-styrene
(SEBS).The
results
strong
evidence
significantly
outperforms
traditional
petroleum-derived
compatibilizers.A
noticeable
increase
impact
resistance
these
achieved,
which
essential
packaging
require
adequate
protection
contained
products.Furthermore,
it
noted
addition
leads
slight
decrease
glass
transition
temperature
(T
g
)
PLA-rich
phase.This
effect
can
be
beneficial
terms
flexibility,
particularly
relevant
products
need
adaptability
variable
conditions.The
second
plane
comprehensive
comparison
between
natural
origin
those
petrochemical
blends.This
analysis
confirms
compatibilizers,
including
(ELO),
notable
advantages
without
compromising
thermal
stability.This
finding
underlines
viability
biobased
specific
applications.
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.
Journal of Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
ABSTRACT
A
toughened
modification
of
polylactic
acid
(PLA)
was
carried
out
using
a
self‐made
polyolefin
elastomer
(TPO(NV))
as
toughening
agent.
In
order
to
enhance
the
mechanical
properties
and
compatibility
PLA
with
TPO(NV),
TPOGS
(TPO
grafted
glycidyl
methacrylate
(GMA)
styrene
(St)
co‐grafting
monomer)
graft
copolymer
prepared
by
melt
grafting
used
compatibilizer,
in
combination
small‐molecule
additive
dibutyl
itaconate
(DBI).
PLA/TPOGS/DBI
blends
varying
DBI
contents
were
prepared,
synergistic
compatibilization
effects
on
PLA/TPO
investigated.
The
impact
content
compatibility,
crystallization
behavior,
rheological
properties,
microstructure
PLA/TPOGS
also
results
confirmed
that
GMA
successfully
onto
TPO
elastomer,
improved.
Furthermore,
found
react
main
chains
or
TPO(NV)
through
double
bonds,
forming
chemical
links
acting
“bridge,”
which,
synergy
copolymer,
further
enhanced
between
TPO(NV).
As
increased,
glass
transition
temperature
(
T
g
)
difference
significantly
decreased
from
95.06°C
(DBI
=
2.5
wt%)
82.53°C
12.5
wt%).
Due
plasticizing
effect
DBI,
flow
index
PLA/TPO(NV)
gradually
increased
content.
addition
did
not
affect
process
during
cooling
PP‐α
crystalline
phase,
degree
crystallinity
remained
relatively
constant,
maintained
around
104°C.
had
stronger
influence
component
within
blends,
higher
led
significant
shift
cold
122.54°C
115.05°C.
This
indicates
primarily
impacts
phase
blend.
initially
but
later
continued
increase.
At
10
wt%,
notched
strength
elongation
at
break
reached
their
highest
values,
1.3
times
7
higher,
respectively,
than
those
blend
without
DBI.
Rapid Prototyping Journal,
Journal Year:
2025,
Volume and Issue:
31(11), P. 231 - 246
Published: April 30, 2025
Purpose
The
purpose
of
this
study
is
to
develop
and
characterize
high-performance,
biodegradable
polylactic
acid
(PLA)-based
materials
for
advanced
applications
that
demand
increased
flexibility
shape
memory
capabilities.
By
introducing
triethyl
citrate
(TEC)
as
a
plasticizer
leveraging
multimaterial
three-dimensional
printing
configurations,
research
aimed
mitigate
PLA’s
inherent
brittleness
expand
its
functional
range.
Additionally,
work
sought
optimize
design
parameters
–
such
infill
orientation
core-shell
distribution
maximize
mechanical
strength,
fracture
toughness
recovery.
Ultimately,
aspired
broaden
applicability
in
fields
like
biomedical
devices,
packaging
engineered
components.
Design/methodology/approach
This
used
fused
deposition
modeling
fabricate
single-material
(core-shell)
samples
using
PLA
blended
with
TEC
at
varying
concentrations
(0–20
Wt%).
Filaments
were
first
compounded
then
extruded
into
1.75
mm
diameter
feedstocks.
Mechanical
properties
evaluated
through
tensile,
flexural
impact
tests,
while
behavior
was
quantified
by
bending-deformation
recovery
experiments
heated
water.
Morphological
analyses
examined
void
formation
surfaces
via
field
emission
scanning
electron
microscopy.
Thermal
transitions
melt
flow
indices
also
characterized
elucidate
the
influence
content.
Findings
results
demonstrated
adding
20
Wt%
significantly
enhanced
elongation
break
up
174%
compared
neat
an
close
2%.
Plasticizer
lowered
glass
transition
temperature
from
62°C
around
30°C.
Shape
rate
above
80%
configurations
obtained,
exhibited
rates
60%.
Multimaterial
featuring
soft
cores
rigid
shells
balanced
stiffness,
superior
energy
absorption
more
efficient
than
homogeneous
counterparts.
Improved
facilitated
better
layer
adhesion,
reducing
voids
increasing
overall
part
integrity.
These
findings
underline
potential
combining
plasticized
careful
material
additive
manufacturing
applications.
Originality/value
provides
novel
demonstration
how
tailored
plasticization
can
collectively
utility
PLA,
bridging
gap
between
traditional
rigidity
flexible,
memory-enabled
structures.
systematically
studying
both
specimens,
offers
key
insights
harnessing
polymer
chain
mobility
preserving
strength.
In
contrast
prior
efforts
focusing
on
either
or
complex
geometries
alone,
integrated
approach
presents
versatile
strategy
be
applied
wide
spectrum
engineering
solutions.
