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Article
Effects of Hard Segment of Polyurethane with Disulfide Bonds on Shape Memory and Self-Healing Ability
Self-healing polyurethane with disulfide bonds was synthesized using polycarbonate diol as a soft segment, and methylene diphenyl diisocyanate and 2-hydroxyethyl disulfide as a hard segment. Well-developed pha...
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Article
Mechanical and photothermal shape memory properties of in-situ polymerized hyperbranched polyurethane composites with functionalized graphene
In-situ polymerized hyperbranched polyurethane (HPU) composites with poly(ε-caprolactone) (PCL)-functionalized graphene oxide (f-GO) sheets were prepared. Both their mechanical and laser-induced photothermal s...
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Article
Preparation and characterization of polyurethane foam using a PLA/PEG polyol mixture
Polyurethanes are polymers with urethane linkages in their backbone. It is prepared by polyaddition polymerization between isocyanates and polyols, which produce different chemical, physical, and mechanical pr...
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Article
Synthesis of calix[4]arene-segmented polyurethane and its nanocomposites with single-walled carbon nanotubes
Calix[4]arene-segmented polyurethane (CPU) was synthesized in a two-step reaction. The synthesis of CPU was confirmed by measurements of FT-IR and 1H-NMR spectroscopy. The CPU nanocomposites with single-walled ca...
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Article
Functionalized multi-walled carbon nanotubes with hyperbranched aromatic polyamide for poly(methyl methacrylate) composites
Multi-walled carbon nanotubes (MWCNTs) were functionalized with hyperbranched aromatic polyamide (HAP) by in situ polymerization and by the AB 2 approach to enhance the mechanic...
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Article
The mechanical properties of polyurethane foam wound dressing hybridized with alginate hydrogel and jute fiber
The purpose of this study is to fabricate a smart wound dressing by hybridizing hydrophilic polyurethane foam (PUF) and alginate hydrogel. Hydrophilic PUF is used to maintain damaged tissue in a moist environm...
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Article
Use of acetylated softwood kraft lignin as filler in synthetic polymers
Partially acetylated softwood kraft lignin (ASKL) is used as filler in synthetic polymers such as LDPE, PP, PS and PET. ASKL/synthetic polymer composites are prepared by melt-blending and compression molding w...
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Article
Size-controlled nanoparticles of poly(acrylonitrile-co-methyl methacrylate) for moisture-absorbing heat release applications
Hydrophilic and water-insoluble poly(acrylonitrile-co-methyl methacrylate) [P(AN-co-MMA)] nanoparticles were prepared to investigate their moisture-absorbing heat release effect. The nanoparticle size was control...
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Article
Core-sheath polyurethane-carbon nanotube nanofibers prepared by electrospinning
The core-sheath nanofibers consisting of polyurethane (PU) core and PU composites sheath with multi-walled carbon nanotubes (MWNTs) were prepared by electrospinning. At low MWNT concentration, MWNTs appeared h...
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Article
Open AccessSynthesis of multi-walled carbon nanotube/polyhedral oligomeric silsesquioxane nanohybrid by utilizing click chemistry
A new hybrid material consisting of a polyhedral oligomeric silsesquioxane (POSS) and carbon nanotube (CNT) was synthesized by a simple and versatile approach entailing click coupling between azide moiety-func...
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Article
Application of shape memory polyurethane in orthodontic
A shape memory polymer wire for orthodontic application was prepared by melt-spinning of polyurethane block copolymer (PU) which was synthesized in a two-step process from a reaction of 4,4′-methylene bis(phen...
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Article
Synthesis and characterization of biocompatible poly(ethylene glycol)-functionalized polyurethane using click chemistry
Functionalization of azide moiety-containing polyurethane (PU) with alkyne-decorated poly(ethylene glycol) (PEG) was accomplished by Cu(I)-catalyzed Huisgen [3+2] dipolar cycloaddition click chemistry. The azi...
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Article
Enhanced mechanical and dielectric properties of poly(vinylidene fluoride)/polyurethane/multi-walled carbon nanotube nanocomposites
Multi-walled carbon nanotubes (MWNTs) nanocomposites with the polymer matrix composed of blends of poly(vinylidene fluoride) (PVDF) and polyurethane (PU) were prepared via functionalization of 3,4,5-triflouroa...
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Article
Synthesis and characterization of polyurethane-based side-chain cholesteric liquid crystal polymers
Polyurethane-based side-chain cholesteric liquid crystalline polymers (ChLCPs) with variable clearing temperatures were synthesized in a two-step reaction. The chemical structures of ChLCPs were confirmed by F...
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Article
Characterization of castor oil/polycaprolactone polyurethane biocomposites reinforced with hemp fibers
The thermal and mechanical properties of castor oil/polycaprolactone-based polyurethane (CPU) films and polyurethane biocomposites reinforced with hemp fibers (HCPU) were investigated. Although similar films c...
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Article
Effects of mechanical strain on the electric conductivity of multiwalled carbon nanotube (MWCNT)/polyurethane (PU) composites
Conducting polymers have been under development for more than thirty years as replacements for metals in various applications, such as fuel cells, solar cells, actuators, etc. In this study, we investigate con...
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Article
The effect of bentonite concentration on the drug delivery efficacy of a pH-sensitive alginate/bentonite hydrogel
We produced a protein loaded, pH-sensitive alginate-bentonite hydrogel for wound dressings. Alginate is a nontoxic polysaccharide with favorable pH-sensitive properties that make it useful for the intestinal d...
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Article
Shape memory effects of polyurethane block copolymers cross-linked by celite
The shape memory polyurethane (PU) copolymers cross-linked by celite, a porous inorganic material with enormous surface area and hydroxyl groups on the surface, were prepared to see if the shape memory effect ...
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Article
Synthesis and properties of shape memory polyurethane nanocomposites reinforced with poly(ɛ-caprolactone)-grafted carbon nanotubes
Nanocomposites of polyurethane (PU) and multi-walled carbon nanotubes (MWNTs) were prepared via in-situ polymerization of poly(ɛ-caprolactone)diol (PCL)-grafted-MWNTs, 4,4′-methylene bis(phenyl isocyanate), an...
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Article
Crystallization and molecular relaxation of poly(ethylene terephthalate) annealed in supercritical carbon dioxide
Poly(ethylene terephthalate) was annealed at different temperature and pressure of supercritical carbon dioxide (CO2) using samples quenched from the melt. Crystallization and molecular relaxation behavior due to...
