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 Following the ester‐amide interchange reaction in the poly(ethylene terephthalate)/poly(amide‐6, 6) (PET/PA) system in the presence of p‐toluenesulfonic acid (TsOH), samples were injection molded and tested in the tensile mode. A brittle fracture was observed for these unoriented specimens. To separate the in…
Thin, amorphous films of carbon have been deposited by conventional and hollow cathode enhanced magnetron sputtering of a pyrolytic graphite target. Films in the range of 15 to 200 nm were deposited over a pressure range or 50 to 0.1 mTorr on fused silica, sapphire, and Si substrates at 20 °C. Langmuir probe measureme…
We have investigated the dynamics of methyl group reorientation in solid methyl-substituted phenanthrenes. The temperature dependence of the proton spin–lattice relaxation rates has been measured in polycrystalline 3-methylphenanthrene (3-MP), 9-methylphenanthrene (9-MP), and 3,9-dimethylphenanthrene (3,9-DMP) at Larm…
Abstract The products in inductively coupled plasma excited in organosilicic compounds were studied on chemical structures by spectroscopic methods. Plasma‐polymerized tetramethylsilane (PA) contains not only SiCH 3 groups but also SiH groups on IR and 29 Si‐NMR analyses. 13 C‐NMR spectrum of PA reveals that the cro…
The hydriding of thick Mg films with a 50–100 Å Pd film on top, as catalyst for H2 dissociation, was investigated by quartz-crystal microbalance uptake measurements in a combined UHV and high-pressure equipment. Unusual kinetics are observed: (i) the hydrogen uptake saturates far from MgH2 at room temperature and (ii)…
Abstract Biaxially oriented poly(ethylene terephthalate) (PET) films have been characterized by small angle and wide angle x‐ray scattering. The films were studied at various rotational angles to the impinging beam and orientations relative to axes in three directions in the film were obtained. Pole figures were devel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBifunctional activation of ketone with rhodium(III) porphyrin. Efficient cooperation of metal and intramolecular baseYasuhiro Aoyama, Atsushi Yamagishi, Yasutaka Tanaka, Hiroo Toi, and Hisanobu OgoshiCite this: J. Am. Chem. Soc. 1987, 109, 15, 4735–4737Publication Date (Prin…
The thermolysis of two compound series, namely, and was studied by differential scanning calorimetry, differential thermal analysis, and thermogravimetry. Product identification and confirmation of thermolysis pathways were accomplished by x‐ray powder diffraction analyses, moisture evolution analyses, and IR spectros…
The magnitude of specular and diffuse Fresnel reflectance from powdered samples was investigated with the use of an FT-IR spectrogoniophotometer with wire-grid polarizers mounted in front of and behind the sample. Specular Fresnel reflectance maintains the polarization of the incoming infrared beam and can therefore b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray crystal structure of the triple-decker-sandwich complex bis(.eta.6-mesitylene)(.mu.-.eta.6:.eta.6-mesitylene)dichromiumWilliam M. Lamanna, William B. Gleason, and Doyle BrittonCite this: Organometallics 1987, 6, 7, 1583–1584Publication Date (Print):July 1, 1987Publicat…
demerits of various algorithms used in numerical analysis as applied to digital computer programming.Initiating this chapter are the various modes of floating point arithmetic and solution of linear equations using the various matrix methods reported in previous chapters.Eigenvalue and lambda-matrix problems with the…
The deposition process of amorphous hydrogenated carbon (a-C:H) in a 13.56 MHz hydrocarbon glow discharge system is investigated. Mass spectrometry was used to measure the relative abundance of the different ionic species. While there is a strong dependence of the mass spectra on the type of hydrocarbon gas (e.g., ben…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVanadium-51 NMR spectroscopy of tungstovanadate polyanions. Chemical shift and line-width patterns for the identification of stereoisomersMichele A. Leparulo-Loftus and Michael T. PopeCite this: Inorg. Chem. 1987, 26, 13, 2112–2120Publication Date (Print):July 1, 1987Publica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid crystalline poly(organophosphazene)Chulhee Kim and Harry R. AllcockCite this: Macromolecules 1987, 20, 7, 1726–1727Publication Date (Print):July 1, 1987Publication History Published online1 May 2002Published inissue 1 July 1987https://pubs.acs.org/doi/10.1021/ma00173a…
The crystallization behavior of polyethylene terephthalate (PET), was investigated under isothermal and dynamic cooling conditions, as a function of molecular weight, polycondensation catalyst system, and polymerization conditions. Crystallization kinetic parameters were calculated for both cases by utilizing Avrami-t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrace determination of nitrogen-containing drugs by surface enhanced Raman scattering spectrometry on silver colloidsEdith L. Torres and J. D. WinefordnerCite this: Anal. Chem. 1987, 59, 13, 1626–1632Publication Date (Print):July 1, 1987Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlass transition and melting behavior of poly(oxy-2,6-dimethyl-1,4-phenylene)Stephen Z. D. Cheng and Bernhard WunderlichCite this: Macromolecules 1987, 20, 7, 1630–1637Publication Date (Print):July 1, 1987Publication History Published online1 May 2002Published inissue 1 July…
Hydrogels of poly(hydroxyethyl methacrylate) (polyHEMA) homopolymer do not normally support the attachment and growth of mammalian cells. By altering the surface it has been possible to dramatically change this cell-substratum interaction so that vascular endothelial cells can attach and completely populate a polyHEMA…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and spectroscopic properties of an unusual copper(I) dimer having imidazole ligands. A model for the carbonyl derivative of hemocyanin and implications for the structure of deoxyhemocyaninThomas N. Sorrell and A. S. BorovikCite this: J. Am. Chem. Soc. 1…
The pressure equation is derived for fluids containing chain molecules interacting with site–site potentials. Three models are considered: a flexible chain with harmonic potentials for bond-length and bond-angle variations, a flexible chain in the limit as the force constants for the vibrations become infinite, and a…