Polymers
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pH- and Thermo-Responsive Water-Soluble Smart Polyion Complex (PIC) Vesicle with Polyampholyte Shells
Polymers - Tập 14 Số 9 - Trang 1659 - 2022
A diblock copolymer (P(VBTAC/NaSS)17-b-PAPTAC50; P(VS)17A50) composed of
amphoteric random copolymer, poly(vinylbenzyl trimethylammonium
chloride-co-sodium p-styrensunfonate) (P(VBTAC/NaSS); P(VS)) and cationic
poly(3-(acrylamidopropyl) trimethylammonium chloride) (PAPTAC; A) block, and
poly(acrylic acid) (PAAc49) were prepared via a reversible
addition−fragmentation chain transfer radical polymer...
Cellulose-Cyclodextrin Co-Polymer for the Removal of Cyanotoxins on Water Sources
Polymers - Tập 11 Số 12 - Trang 2075
With increasing global water temperatures and nutrient runoff in recent decades,
the blooming season of algae lasts longer, resulting in toxin concentrations
that exceed safe limits for human consumption and for recreational use. From the
different toxins, microcystin-LR has been reported as the main cyanotoxin
related to liver cancer, and consequently its abundance in water is constantly
monitore...
Silk Composite with a Fluoropolymer as a Water-Resistant Protein-Based Material
Polymers - Tập 10 Số 4 - Trang 459
Silk-based materials are water-sensitive and show different physical properties
at different humidities and under wet/dry conditions. To overcome the water
sensitivity of silk-based materials, we developed a silk composite material with
a fluoropolymer. Blending and coating the silk protein-based materials, such as
films and textiles, with the fluoropolymer enhanced the surface hydrophobicity,
wat...
Influence of Functionalization Degree on the Rheological Properties of Isocyanate-Functionalized Chitin- and Chitosan-Based Chemical Oleogels for Lubricant Applications
Polymers - Tập 6 Số 7 - Trang 1929-1947
This work deals with the influence of functionalization degree on the
thermogravimetric and rheological behaviour of NCO-functionalized chitosan- and
chitin-based oleogels. Chitosan and chitin were functionalized using different
proportions of 1,6-hexamethylene diisocyanate (HMDI) and subsequently dispersed
in castor oil to promote the chemical reaction between the –NCO group of the
modified biopo...
Tunable Structure and Properties of Segmented Thermoplastic Polyurethanes as a Function of Flexible Segment
Polymers - Tập 11 Số 12 - Trang 1910
Segmented thermoplastic polyurethanes (PUs) were synthetized using macrodiols
with different functional groups (carbonate, ester, and /or ether) as a segment
with a molar mass of 1000 and 2000 g/mol, and 4,4’-diphenylmethane diisocyanate
(MDI) and 1,4-butanediol as a rigid segment. The polyurethanes obtained reveal a
wide variation of microphase separation degree that is correlated with
mechanical...
Microstructural Contributions of Different Polyolefins to the Deformation Mechanisms of Their Binary Blends
Polymers - Tập 12 Số 5 - Trang 1171
The mixing of polymers, even structurally similar polyolefins, inevitably leads
to blend systems with a phase-separated morphology. Fundamentally understanding
the changes in mechanical properties and occurring deformation mechanisms of
these immiscible polymer blends, is important with respect to potential
mechanical recycling. This work focuses on the behavior of binary blends of
linear low-dens...
Determination of Frequency-Dependent Shear Modulus of Viscoelastic Layer via a Constrained Sandwich Beam
Polymers - Tập 14 Số 18 - Trang 3751
Viscoelastic material can significantly reduce the vibration energy and radiated
noise of a structure, so it is widely used in lightweight sandwich structures.
The accurate and efficient determination of the frequency-dependent complex
modulus of viscoelastic material is the basis for the correct analysis of the
vibro-acoustic behavior of sandwich structures. Based on the behavior of a
sandwich be...
Thermal Stability, Smoke Density, and Flame Retardance of Ecotype Bio-Based Flame Retardant Agricultural Waste Bagasse/Epoxy Composites
Polymers - Tập 13 Số 17 - Trang 2977
In the study, agricultural waste bagasse was used as a bio-based flame retardant
for reducing the flammability of epoxy. Specifically, an interpenetrating
network (IPN) was formed through a ring opening reaction between the hydroxyl
functional group of bagasse and the epoxy group of triglycidyl isocyanurate
(TGIC), forming Bagasse@TGIC. Next, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene
10-oxide (DO...
Hierarchical Porous Polyamide 6 by Solution Foaming: Synthesis, Characterization and Properties
Polymers - Tập 10 Số 12 - Trang 1310
Porous polym er materials have received great interest in both academic and
industrial fields due to their wide range of applications. In this work, a
porous polyamide 6 (PA6) material was prepared by a facile solution foaming
strategy. In this approach, a sodium carbonate (SC) aqueous solution acted as
the foaming agent that reacted with formic acid (FA), generating CO2 and causing
phase separati...
Lightweight High-Performance Polymer Composite for Automotive Applications
Polymers - Tập 11 Số 2 - Trang 326
The automotive industry needs to produce plastic products with high dimensional
accuracy and reduced weight, and this need drives the research toward less
conventional industrial processes. The material that was adopted in this work is
a glass-fiber-reinforced polyamide 66 (PA66), a material of great interest for
the automotive industry because of its excellent properties, although being
limited i...
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