Materials Literature
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Abstract The morphology of nylon 6 and polystyrene (PS) blend with styrene‐maleic anhydride copolymer (SMA) as a compatibilizing agent was studied. The long‐time mixing of blends exhibited slight decrease in storage modulus and larger domain size. This may be caused by imidization between amine end‐group of nylon 6, a…
In this study, natural rubber (NR) was reinforced with the unique composition of Jordanian silica sand at different loadings (10, 30, 50, and 75 pphr) and different particle sizes (10, 25, 45, and 75 μm). Several tests, such as hardness, tensile strength, elongation at break, compression set, compression stress-strain…
Abstract β‐Chitin was extracted from squid pens and its heterogeneous alkaline deacetylation was performed under various conditions. The kinetics of the first, second and third deacetylation reaction of β‐chitin was investigated under conditions minimizing bulk mass transfer. It was found that the effects of temperatu…
In principle, one might prepare thin polymer membranes in an easy and economic way by generating a wetting layer of a polymerizable oil on a water surface, solidifying it, and transferring it to a solid substrate. However, there is hardly any oil that wets a water surface. One efficient way to assist the wetting of th…
The ring-opening polymerization of α-methylene-ε-caprolactone (α-MCL) is presented for the first time. Poly(α-MCL) was characterized by 1 H NMR, GPC, DSC, and MALDI-TOF. The ring-opening copolymerization of α-MCL with ε-caprolactone (ε-CL) yields to formation of radically cross-linkable poly(ε-CL)s with melting points…
Within the framework of a self-consistent $spd$ tight-binding Hamiltonian and ab initio pseudopotential techniques we study the magnetic properties of small ${\mathrm{Co}}_{N}$, ${\mathrm{Ni}}_{N}$, ${\mathrm{Rh}}_{N}$, and ${\mathrm{Pd}}_{N}$ $(N=4\ensuremath{-}21)$ clusters having noncompact structures. Following th…
The dipole-quadrupole and dipole-octopole polarizabilities A and E of TiCl4, ZrCl4, and HfCl4 have been determined from collision-induced light-scattering experiments. Our respective experimental results for /A/ are (165+/-10), (110+/-30), and (140+/-20) e2a0 3Eh (-1), whereas /E/ is determined to be (675+/-125), (750…
A dithiolated random copolymer with pendent phenylboronic acid residues [Cys-poly(3-acrylamidophenylboronic acid-co-N,N-dimethylaminopropyl methacrylamide), Cys-poly(APBA-co-DMAPMA)] that shows the abilities of initiation, transfer, and termination (iniferter) was obtained by using a benzyl N,N-diethyldithiocarbamoyl…
Polystyrene−poly(methyl methacrylate) (PS−PMMA) mixed brushes synthesized by surface-initiated polymerization show nanophase separation into defined pattern depending on the molecular parameters of the brushes. Two sets of mixed brushes are studied: (i) with fixed grafting density and molecular weight of the PS chains…
We report on the application of a magnetic composite metamaterial. The magnetic response of the metamaterial in the light region of the spectrum can realize the Brewster condition for $s$-polarized light. By introducing a uniaxial magnetic metamaterial consisting of stacked two-dimensional arrays of split-ring resonat…
Soot particles vary in pore structure, surface properties, and content of authigenic (native) extractable organic chemicals. To better understand the effects of these properties on sorption, aqueous sorption isotherms for 14C-labeled phenanthrene and 1,2,4-trichlorobenzene were obtained for four soots of varying prope…
Poly(N-isopropylacrylamide)s with imidazole endgroups were used to separate a histidine-tagged protein fragment directly from a crude cell lysate. The polymers display a lower critical solution temperature that can be tuned to occur at a range of subambient temperatures. UV-visible spectra indicated differences in the…
In the present paper, the nature of the fragility of liquids with a developed H-bond network is investigated. It is shown that the effective activation energy of the shear viscosity $\ensuremath{\eta}$ and the fragility parameter defined as $m={\phantom{\ensuremath{\mid}}d\phantom{\rule{0.2em}{0ex}}\mathrm{log}\phanto…
A surfactant ion-pair complex, [Ru(bpy)(2)L][Eu(NTA)(4)](2) (in which L = 1-docosyl-2-(2- pyridyl)benzimidazole, bpy = 2,2'-bipyridine, and NTA = 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedionato) has been synthesized. The surface pressure-area isotherm measurements show that the complex forms a stable Langmuir film at…
The single file diffusion in a circular channel of millimetric charged balls is studied. The evolution in time of the mean square displacement is shown to be subdiffusive, but slower than the powerlike t1/2 behavior observed in circular colloidal systems or predicted in one-dimensional infinite systems.
Low viscosity, photocurable liquids are demonstrated as ideal materials for the formation of pillar arrays generated spontaneously by field-assisted assembly. Pillars form spontaneously via electrohydrodynamic instabilities that arise from the force imbalance at a film−air interface generated by an applied electric fi…
Brought to light: The light sensitivity of photolabile protecting groups of the nitrophenylpropoxycarbonyl (NPPOC) type was enhanced by up to a factor of 25. This was achieved by covalently linking the protecting group to a sensitizer with a much better absorptivity and the ability to transfer its electronic excitatio…
Silica-coated silver nanowires can be chemically treated to produce a "peapod" architecture in which silver peas are embedded in silica pods. The silver "pea" dimension and interparticle spacings are controllable down to approximately 50 nm. This architecture is potentially useful for chemical sensing, plasmonic, or c…
Quasielastic neutron scattering combined with deuteration labeling has allowed us to follow selectively the dynamics of the hydrogens of poly(ethylene oxide) (PEO, T g ≈ 220 K) in a blend with poly(vinyl acetate) (PVAc, T g = 315 K) (20% PEO/80% PVAc in weight, = 280 K). Temperatures between −10 K and + 120 K have bee…
The tetrabutylammonium salt of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) is soluble in dichloromethane, and the general properties of this compound have been investigated as function of various added acids HX (X = Cl, Br, I, CF(3)COO, CF(3)SO(3), TFPB) through UV-vis absorption spectroscopy, steady state…