Materials Literature
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Abstract Polyaniline‐phosphate polymer was prepared chemically by oxidation polymerization of aniline in phosphoric acid medium using ammonium persulphate. The PANI‐phosphate polymer was characterized by FTIR, XRD, and SEM. The paints using PANI‐phosphate as pigment in acrylic and epoxy binder were prepared. The prote…
Abstract Itaconate‐unit‐containing poly(butylene succinate) (PBSI) was synthesized by the reaction of 1,4‐butanediol, succinic acid, and itaconic acid in a molar ratio of 2.0 : 1.0 : 1.0, and the obtained PBSI was reacted with methacryl‐group‐substituted polysilsesquioxane (ME‐PSQ) in the presence of benzoyl peroxide…
Polyurethane networks with enhanced thermal stability and electrical insulation properties were prepared from the reaction of epoxy-terminated urethane prepolymers (EPU) and polyimides containing pendant phenol groups (HPI). EPUs were prepared by the reaction of glycidol with NCO-terminated urethane oligomers. The oli…
Abstract The metal complexes of N , N ′‐bis ( o ‐hydroxy acetophenone) propylene diamine (HPPn) Schiff base were supported on cross‐linked polystyrene beads. The complexation of iron(III), copper(II), and zinc(II) ions on polymer‐anchored HPPn Schiff base was 83.4, 85.7, and 84.5 wt%, respectively, whereas the complex…
Abstract Dynamic‐strain softening known as the Payne effect was investigated in the case of poly(vinyl acetate)‐hydroxyapatite (PVAc‐HA) model nanocomposites in which the nanoparticles served as reversible physical cross‐links. HA nanofillers with different particle shape and with size ranging from 5 to 60 nm were use…
In an attempt to overcome the technical challenges in the conventional solution-processed near infrared (NIR) photodetectors, we have used NaYF4:Yb, Er upconversion fluorescence nanocrystals to replace the semiconductor quantum dots in conjugated polymers. Under NIR excitation, the NaYF4:Yb, Er nanocrystals emit visib…
We present results of measurements of the conductance and dielectric permittivity at various cooling and heating rates through the phase transition into the charge-ordered state in $\ensuremath{\theta}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{2}\mathrm{Rb}\mathrm{Zn}{(\mathrm{S}\mathrm{C…
A straightforward and effective method for the fabrication of double-length-scale patterned (i.e., composite micro- and nanopatterned) carbon nanotube (CNT) arrays can be achieved by block copolymer templating on a prepatterned conducting substrate followed by electroplating to deposit Ni (see figure). Significant imp…
A novel fiber-oriented scattering polarizer is prepared by infiltrating liquid crystal into an aligned-fiber film (schematically shown in the figure), which is fabricated by using an optimized strategy of anisotropic electrospinning. The new-style polarizer has a high polarizing efficiency, is simple to fabricate and…
Abstract Thermoplastic chitosan/natural rubber blends (Cs/NR) were prepared from natural rubber latex and chitosan by solution casting technique. The blends were characterized by mechanical analysis (stress–strain) and the mechanical properties were found to vary with chitosan/natural rubber ratios. Experimental value…
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The Ba0.6Sr0.4TiO3 (BST)/poly(methyl methacrylate) (PMMA) tunable composites in 1-3-type structure consisting of BST rods in low-permittivity PMMA matrix are fabricated by dice and fill technique. For the composite containing 41.6vol% BST, the permittivity and the loss tangent of the composite are 1212 and 0.026 at 10…
High-quality CdS nanowires with wurtzite structure were produced by thermal evaporation of CdS powder. The nanowires were core-shell structures, consisting of crystalline core and amorphous/polycrystal shell. The intensity of the second-order longitudinal phonon mode in the Raman spectrum of the CdS nanowires is highe…
Abstract Two series of melt‐processable polyimides were prepared from 4,4′‐bis(3‐amino‐5‐trifluoromethylphenoxy)biphenyl ( m ‐6FBAB) and 4,4′‐bis(4‐amino‐5‐trifluoromethylphenoxy) biphenyl ( p ‐6FBAB) with various aromatic dianhydrides. The effects of the chemical structures of the polyimides on their properties, espe…
The viscosity of melts in the Na 2 O-CaO-Al 2 O 3 -SiO 2 system follows the same trend as a function of composition as that observed in the Na 2 O-Al 2 O 3 -SiO 2 system; in that there is a local maximum in viscosity at the condition Na 2 O+CaO ~Al 2 O 3 . This is despite the difference in charge of Na + and Ca 2+ , t…
Abstract Polyether(bisurethane‐bisurea‐bisamide)s (PEUUA) based on poly(tetramethylene oxide) (PTMO) were synthesized by chain extension of PTMO endcapped with a diisocyanate (DI), and a diamine–diamide extender. The prepolymers were PTMOs with molecular weights between 1270 and 2200 g mol −1 , either endcapped with 4…
The (001) surface of the hexagonal hydroxyapatite HA [Ca 10 (PO 4 ) 6 (OH) 2 , layer group P 3] is simulated with the slab approach by fully optimizing (cell size and internal coordinates) two models, respectively 6 A and 14 A thick, in a fully ab initio periodic approach. The B3LYP hybrid functional and a Gaussian ba…
Starting from 1,3-phenylene linked diporphyrin zinc(II) complex 2ZA, repeated stepwise Ag I-promoted coupling reactions provided linear oligomers from 2nZA up to 128ZA. Of these zigzag shaped porphyrin arrays, the Ag I-promoted intramolecular cyclization reaction of 2 nZA (n=5, 6, 8, 9, 12, and 16) under dilute condit…
Abstract A symmetrical (p/p) supercapacitor has been fabricated by making use of activated carbon (AC)‐polyethylenedioxythiophene (PEDOT)‐composite electrodes for the first time. The composite electrodes have been prepared via electrochemical deposition of β‐napthalenesulphonate doped PEDOT onto AC electrodes. The cha…
In microelectronics technologies, patterning of sub-100nm width ridges capped with a titanium nitride mask can lead to undulations of the ridges detrimental to performances. This phenomenon is observed with highly compressive residual stress into the mask (>2GPa), with dielectrics with low elastic properties (E…