Materials Literature
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The peptides (AG)(6)(VPGVG)(AG)(7) and (AG)(5)(VPGVG)(2)(AG)(5) are models for a new type of protein with both composition and properties such as Bombyx mori silk and elastin. In this paper, we report the solid-state NMR results for these samples and related peptides; the structures after dialysis of the 9 M LiBr aque…
Abstract Water soluble polyurethanes (WSPU)s have been prepared by polycondensation of isophorondiisocyanate and tolylene‐2,4‐diisocyanate with poly(ethylene glycol)s (PEGs) of molecular weights 400, 600, and 1,000. The physicochemical properties of the WSPUs depend on the hydrophilic–hydrophobic balance in their poly…
Abstract Porous polymeric materials can be prepared by using micromechanical deformations. The development of porous structures in the tension of polyolefin blends are studied with the goal of developing a novel technique to make porous films. It is found in polypropylene/polyethylene copolymer blends of near 50/50 we…
Abstract A series of monomeric azobenzene derivatives of 6‐(4‐nitro‐4′‐oxy‐azobenzene acrylate with carbon numbers of 6 and 11, and the chiral monomer of bornyl 4‐(6‐acryloyloxyhexyloxy)‐phenyl‐4′‐benzoate were synthesized. Chiral polymers having bornyl group end‐capped pendants with azobenzene‐derived segments were p…
Abstract Fractionated crystallization behavior of dispersed PA6 phase in PP/PA6 blends compatibilized with PP‐ g ‐MAH was investigated by scanning electron microscopy (SEM), differential scanning calorimeter (DSC), polarized light microscopy (PLM), and wide‐angle X‐ray diffraction (WAXD) in this work. The lack of usua…
Abstract CuCl und GaCl 3 reagieren in THF mit Se(SiMe 3 ) 2 in Anwesenheit von PEt 2 Ph zu [Cu 20 Ga 10 Cl 4 Se 23 (PEt 2 Ph) 12 ] ( 1 ). Die Reaktion von CuCl, InCl 3 und TMEDA mit i PrSeSiMe 3 führt in DME zur Bildung von [Cu 14 In 6 Se 7 ( i PrSe) 18 ] ( 2 ). Die Strukturen der Verbindungen 1 und 2 konnten durch Ei…
Aqueous solutions that contained 400–1,000 mg/L of ammonia were oxidized in a trickle-bed reactor in this study of copper–lanthanum–cerium composite catalysts, which were prepared by the co-precipitation of copper nitrate, lanthanum nitrate and cerium nitrate at various molar concentrations. Results revealed that the…
We carried out a unique comparative study between three modes of cryo-scanning electron imaging: high-vacuum, low-voltage and low-vacuum, using ice cream as a model system. Specimens were investigated both with and without a conductive coating (Au/Pd) and at temperatures for which ice either remains fully frozen (< -1…
Abstract The synthesis and self‐polyaddition of the optically active monomers I‐T( L )‐M and I‐T( D )‐M bearing both isocyanate and hydroxyl groups were examined. I‐T( L )‐M and I‐T( D )‐M were synthesized by reactions of L ‐ and D ‐tyrosine methyl ester, T( L )‐M and T( D )‐M, with di‐ tert ‐butyltricarbonate, respec…
Abstract Polypyrrole (PPy) films doped with arylsulfonate dopants were prepared by electrochemical polymerization, to investigate the effects of various dopants on conductivities, thermal stabilities, and morphologies of PPy films. Also, HCl was added to those dopants as a cooperating dopant, to improve conductivity o…
Abstract Ethylene oxide (EO) has been block‐polymerized with both ε‐caprolactone (ε‐CL) and γ‐methyl‐ε‐caprolactone (MCL) through the combination of the anionic polymerization of EO and the ring‐opening polymerization (ROP) of ε‐CL and MCL. ω‐Hydroxyl poly(ethylene oxide) has been reacted with triethylaluminum (OH/Al…
Abstract A novel wood–plastic compatibilizer system containing a paper wet‐strength agent as a wood‐binding domain and stearic anhydride as a polyethylene (PE) binding domain was investigated. Treatment of wood flour with a commercial paper wet‐strength agent Kymene® 557H (simply called Kymene) before the mixing of PE…
A solution-phase, precursor method has been demonstrated for the large-scale synthesis of single crystalline nanowires of lead with uniform diameters in the range 50−90 nm and lengths up to several millimeters. In a typical procedure, the nanowires were synthesized by refluxing a mixture of Pb(CH 3 COO) 2 ·3H 2 O and…
The protonated imidazole diphosphopentamolybdenum polyoxometalate (C4H7N2)4[HP2Mo5O23]·H3O· 4.5H2O has been synthesized and its structure has been determined by single-crystal X-ray diffraction. This compound crystallizes in the triclinic crystal system, space group P(−1), a = 10.171(2), b = 11.839(2), c = 20.170(4) Å…
We report a study of the freezing and melting of fluids confined within multi-walled carbon nanotubes with an internal diameter of 5 nm, using experimental measurements and molecular simulations. Dielectric relaxation spectroscopy was used to determine the experimental melting points and relaxation times of nitrobenze…
Abstract Ca 3 SiO und sieben weitere inverse Perowskite M 3 TO (M = Ca, Sr, Yb; T = Si, Ge, Sn, Pb) wurden durch die Reaktion 6 M + TO 2 + T = 2 M 3 TO bzw. 3 M + TO = M 3 TO für Yb 3 PbO in verschlossenen Reineisentiegeln unter Argon bei Temperaturen von 1123—1173 K dargestellt. Die Kristallstrukturen aller Verbindun…
Vascular tissue can penetrate implants that have an interconnected porous structure. The extent of vascularization is heavily dependent on a number of factors, including the nature of the material as well as the size and porosity of the implant's pore morphology. Currently, it is still not clear what mechanisms are co…
Gold nanoparticles are excellent biocompatible surfaces for the immobilization of enzymes. However, separation of the gold nanoparticle-enzyme bioconjugate material from the reaction medium is often difficult. In this study, we investigate the assembly of the gold nanoparticles on the surface of the amine-functionaliz…
Abstract The synthesis and characterization of dendritic homopolymers and block copolymers of ϵ‐caprolactone and lactide ( L ‐lactide and racemic lactide) were performed with multifunctional initiators in combination with living polymerization and the selective placement of branching junctures in a divergent growth st…
Abstract A method of recycling postconsumer poly(ethylene terephthalate (PET) using transesterification was studied. Shredded flakes of postconsumer PET waste were transesterified with higher diols, such as 1,4‐butanediol, 1,4‐cyclohexane dimethanol, and 1,6‐hexanediol, to yield copolyesters in the presence of Ti(iPrO…