Renewable Phenolic Resins Based on Nitrogen‐Coordinated Cyclic Boronic Ester Bonds
Macromolecular Rapid Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 12, 2025
Abstract
Phenolic
resins
(PRs)
are
known
for
their
exceptional
performance
due
to
3D
cross‐linked
structure
formed
during
curing.
However,
this
crosslinking
makes
them
non‐reprocessable
and
difficult
recycle,
leading
significant
environmental
pollution
resource
waste.
In
study,
the
reactivity
of
phenolic
hydroxyl
group
in
thermoplastic
PR
(abbreviated
as
NR)
is
utilized
introduce
a
highly
stable
nitrogen‐coordinated
cyclic
boronic
ester
(NCB)
into
traditional
carbon‐chain
polymers
with
aid
aliphatic
isocyanates.
This
dynamic
polymer,
based
on
NCB
linkages,
not
only
deforms
conveniently
under
appropriate
stimuli
but
also
retains
excellent
dimensional
stability
mechanical
properties
service
environments.
approach
gives
full
play
good
processability
NR,
enabling
closed‐loop
recycling
waste
resins.
method
provides
promising
solution
sustainable
efficient
recycling,
offering
novel
pathway
reduce
impact
Язык: Английский
Electrospun Poly(butylene 2,5-furanoate) and Poly(pentamethylene 2,5-furanoate) Mats: Structure–Property Relationships and Thermo-Mechanical and Biological Characterization
Molecules,
Год журнала:
2025,
Номер
30(4), С. 841 - 841
Опубликована: Фев. 12, 2025
This
study
explores,
for
the
first
time,
application
of
electrospun
biobased
poly(butylene
2,5-furanoate)
(PBF)
and
poly(pentamethylene
(PPeF)
mats
in
biomedical
drug
delivery
fields,
through
a
careful
investigation
their
structure-property
relationship.
PBF
mats,
with
glass
transition
temperature
(Tg)
25-30
°C
an
as-spun
crystallinity
18.8%,
maintained
fibrous
structure
(fiber
diameter
~1.3
µm)
mechanical
properties
(stiffness
~100
MPa,
strength
~4.5
strain
at
break
~200%)
under
treatment
physiological
conditions
(37
°C,
pH
7.5).
In
contrast,
PPeF
being
amorphous
Tg
14
underwent
significant
densification,
geometrical
density
increasing
from
0.68
g/cm³
to
1.07
g/cm³,
which
depressed
specific
(i.e.,
normalized
by
density)
properties.
DSC
analysis
revealed
that
promoted
crystallization
(reaching
45.9%
crystallinity),
while
showed
limited,
but
interestingly
not
negligible,
structural
reorganization.
Both
materials
good
cell
adhesion
were
biocompatible,
lactate
dehydrogenase
release
exceeding
20%
after
48
h.
The
potential
was
evaluated
using
dexamethasone.
exhibited
controlled
profile,
~10%
4
h
~50%
20
demonstrates
versatility
these
biopolyesters
applications
highlights
impact
polymer
on
material
performance.
Язык: Английский
Bio-based thermoplastic poly(ether-ester) elastomers from 2,5-thiophenedicarboxylic acid with high stiffness and elasticity
Chemical Engineering Journal,
Год журнала:
2025,
Номер
unknown, С. 161856 - 161856
Опубликована: Март 1, 2025
Язык: Английский
Design and Synthesis of Biobased, Biodegradable Polyester for Chewing Gum
Macromolecular Rapid Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 4, 2025
Abstract
Conventional
chewing
gum
(CG)
consisting
of
sweeteners
and
unbiodegradable
base
(CGB)
has
caused
severe
pollution
to
the
environment.
To
address
this
issue,
work
designs
synthesizes
a
partially
crosslinked
biobased
biodegradable
polyester
elastomer
replace
high
molecular
weight
rubber
in
traditional
CG
for
elasticity,
along
with
resin
glass
transition
temperature
(
T
g
)
≈38
°C
provide
plasticity
CG.
Subsequently,
is
prepared.
Poly(1,3‐propanediol/glycerol/sebacate/succinate)
(PPGSeSu)
elastomers
adjustable
gel
content
good
elasticity
are
synthesized
by
adjusting
glycerol,
poly(2,3‐butanediol/isosorbide/succinate)
(PBIS)
resins
8–65
prepared
tuning
molar
ratio
isosorbide
2,3‐butanediol.
As
result,
fully
biobased,
similar
performance
that
commercially
available
ones
achieved
using
PPGSeSu‐25%P
(with
8.58%
content)
PB
50
I
S
=
38
°C).
The
biodegradation
rate
new
75.52%
after
97
d,
its
properties
comparable
those
according
texture
profile
analysis
results.
Язык: Английский