Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The surface structure and physical properties of polyethylene glycol series polyurethane (PEG‐PU) membranes, in which were introduced hydrophobic polydimethylsiloxane (PDMS) component by the procedure of PU blending or of soft‐segment copolymerization, were studied in this investigation. In the case of the bl…
Abstract Iminoamino methylene bases intermediates are obtained by the decomposition of hexamethylenetetramine (hexamine). These are stabilized by the presence of strong anions such as SO and HSO , that is, “hexamine sulfate.” The effect of hexamine sulfate was closely linked to the strong buffering action it has on MU…
The interfacial tension between two low-molar-mass biphenylcarbonitriles that exhibit liquid crystalline phases (4‘-pentyl-4-biphenylcarbonitrile and 4‘-octyl-4-biphenylcarbonitrile) and poly(dimethylsiloxane) was measured as a function of temperature using pendant drop tensiometry enhanced by video-image digitization…
It is typical in smectic liquid crystals to describe elastic deformations with a linear theory when the elastic strain is small. In smectics, certain essential nonlinearities arise from the requirement of rotational invariance. By employing the Bogomol'nyi, Prasad, and Sommerfield decomposition and relying on boundary…
The transamination reaction of Sm{N(SiMe 3 ) 2 } 2 (THF) 2 with two dipyrrole ligands of formula RR‘C(α-C 4 H 3 NH) 2 (R = R‘ = Et; R = Me, R‘ = Ph) has been examined. The reactions in THF and under N 2 gave two similar tetranuclear dinitrogen complexes, {[Et 2 C(α-C 4 H 3 N) 2 Sm} 4 (THF) 2 ](μ-N 2 )·2THF and [{[(C 6…
We have studied coating effects of bulk ZnO crystal by means of photoluminescence (PL) measurements. Bulk crystal surface of ZnO is once covered by the melt of alkali halide at high temperature and is coated with thin alkali halide crystal. At low temperature, band-edge PL intensity of the ZnO crystal coated with KCl…
The fourth generation of a dendritic polyphenylazomethine (DPA G4) has 2, 4, 8, and 16 imine groups in the first, second, third, and fourth shells, respectively (total, 30 imine groups). DPA G4 can trap 30 equiv of SnCl(2) molecules, because the imine group is complexed with SnCl(2) at a ratio of 1:1. During addition…
Abstract A polysilazane containing iron (PSZI) was synthesized by the polycondensation of silazane lithium salts with FeCl 3 , and the structure of PSZI was characterized by IR, NMR, and elemental analyses. PSZI was used as an antioxidation additive for methylsilicone oil and rubber. The gelling time of silicone oil w…
Applying a first-principles scheme to liquid ${\mathrm{GeSe}}_{4},$ we show that the charge-charge structure factor does not present any feature at the location of the first sharp diffraction peak (FSDP), despite a clear FSDP in the concentration-concentration structure factor ${S}_{\mathrm{CC}}(k).$ The origin of thi…
Abstract We studied the effects of fillers on the mechanical, dynamic mechanical, and aging properties of rubber–plastic binary and ternary blends derived from acrylic rubber, fluorocarbon rubber, and multifunctional acrylates. The addition of fillers, such as carbon black and silica, changed the nature of the stress–…
Tetrahedral amorphous carbon (ta-C) films have been grown on Ar+-beam-cleaned silicon substrates by changing the incident angle of energetic carbon ions produced in the plasma of pulsed cathodic vacuum arc discharge. Their surface roughness, deposition rate, composition, and mechanical and frictional properties as a f…
Abstract Polysiloxane–polyurethane crosslinked polymer networks (PSI–PU) were synthesized in solution by polymerization of oligosiloxanes containing γ‐hydroxy propyl groups with polymethane polyphenyl polyisocyanate. Polyether‐based polyurethane and polyester‐based polyurethane were also prepared by a “one‐shot” metho…
Abstract A series of water‐borne polyurethanes were prepared by prepolymerization process. Isophorone diisocyanate, polyester diol, and dimethylol propionic acid were used to conduct the reaction. 1 H‐ and 13 C‐NMR spectra of the raw materials and products thereof were measured with a high‐resolution spectrometer, and…
New binuclear and starburst trinuclear organoplatinum complexes based on 2,2‘-dipyridylamino (dpa) derivative ligands, Pt 2 Ph 4 (bab), bab = 1,4-bis(2,2‘-dipyridylamino)benzene, 1, Pt 2 Ph 4 (babp), babp = 4,4‘-bis(2,2‘-dipyridylamino)biphenyl, 2, Pt 3 Ph 6 (tab), tab = 1,3,5-tris(2,2‘-dipyridylamino)benzene, 3, Pt 3…
[reaction: see text] Novel D-pi-A NLO-phores based on the 1,3-dithiol-2-ylidene donor and the thiobarbituric acceptor moieties have been prepared. Modification of the length and rigidity of the pi-spacer allows the first systematic study of the second-order nonlinear optical properties of doubly proaromatic merocyanin…
Surface or disjoining forces between protein layers adsorbed at the air/water interface were measured in single, isolated films. Two proteins, β-casein and bovine serum albumin (BSA), were investigated under varying conditions of pH, ionic strength, and degree of aging at the interface. Force−distance curves were dete…
A recently developed class of magnetic field sensors is based on the action of a magnetostrictive material on a piezoelectric material. Described here is a significant improvement on this class, a passive magnetic field sensor made of layers of Terfenol-D {Fe<sub>2</sub>(Dy<sub>0.7</sub>Tb<sub>0.3</sub>)} magnetostric…
A novel photooxidative system for degrading toxic organic pollutants, including organic dyes and small molecular compounds such as Rhodamine B (RhB) and 2,4-dichlorophenol (DCP), is reported. A metal−organic complex (β-cyclodextrin−hemin, CDH), synthesized by combining β-CD with the bioactive small molecule hemin, can…
Two novel coordination polymers of Co(II) with dicyanamide (dca) were obtained by the addition of ancillary ligands of pyrazine dioxide (pzdo) and 2-methyl pyrazine dioxide (mpdo) into the Co-dca binary system, respectively. Co[N(CN)(2)](2)(pzdo) (1) crystallizes in the orthorhombic space group of Pnnm (No. 58) with a…
Abstract This study sought to synthesize an in situ epoxidized natural rubber (NR) from 20% dry rubber content latex stabilized by nonionic surfactant, 5 phr of Terric 16A16, in the presence of hydrogen peroxide and formic acid at the temperature of 50°C. The molar ratios of H 2 O 2 and HCOOH to isoprene unit were equ…