Materials Literature
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Abstract End-linking mixtures of very short and relatively long polydimethylsiloxane chains with a multi-functional alkoxy silane yields model elastomeric networks having a bimodal chain length distributions, and earlier studies have shown that this compositional heterogeneity increases the ultimate properties of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect probing of the surface properties of alkali-treated aluminas by infrared and x-ray photoelectron spectroscopyP. O. Scokart, A. Amin, C. Defosse, and P. G. RouxhetCite this: J. Phys. Chem. 1981, 85, 10, 1406–1412Publication Date (Print):May 1, 1981Publication History P…
Abstract On the basis of the valence band structure regularities, obtained from combined X‐ray spectral and X‐ray photoelectron studies of electron energy spectra, a model is suggested for the interaction between valence electrons of s, p‐elements and d‐electrons of IIIA, IIB, IB, and transition metals under the forma…
Under certain conditions the anions from 2,5-dihydrothiophen 1-oxide and 2,5-dihydrothiophen 1,l-dioxide undergo ring-opening reactions and the resulting buta-1,3-dienylsulfenate and buta-1,3- dienylsulfinate ions respectively may be alkylated. The anion from 2,5-dihydrothiophen also rearranges to the buta-1,3-dienylt…
The kinetics of iron corrosion in deoxygenated 0.5M H2SO4 containing either unsubstituted benzotriazole or its 5-substituted derivatives, BTA-CH3 (TTA), BTA-NH2, BTA-NO2, BTA-Cl, and BTA-COOH have been investigated. At 0.1 mM and 2 hours immersion of iron, a simple adsorption mode of the inhibitors is indicated during…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon-13 nuclear magnetic resonance chemical shifts and the microstructures of the fluoropolymers poly(vinylidene fluoride), poly(fluoromethylene), poly(vinyl fluoride), and poly(trifluoroethylene)A. E. Tonelli, F. C. Schilling, and R. E. CaisCite this: Macromolecules 1981,…
Transparent and colorless glass rods have been obtained from the BaF 2 -CaF 2 -YF 3 -AlF 3 system, which consists of 15 to 27 mol% BaF 2 , 13 to 25 mol% CaF 2 , 6 to 28 mol% YF 3 and 37 to 50 mol% AlF 3 . Certain physical properties for the rods have been measured. Glass transition temperature, crystallization tempera…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTStudies on man-made photoreaction centers and electron relay systems. 1. Enhancement of charge separation by the aid of aligned viologen units in combination with ruthenium complexesTaku Matsuo, Tetsuo Sakamoto, Keisuke Takuma, Katsuhiko Sakura, and Tatsuya OhsakoCite this: J. P…
Scanning electron microscopy (BSE mode) and selected-area channelling patterns have been used to determine the orientation, size, growth rate, and. nucleation sites of secondary grains in primary recrystallized Fe-3.35Si alloy sheet. Most secondary grains nucleate in a critical depth range of 10–80 μm below the sheet…
Abstract The rubber adhesion of brass-plated steel tire cord has been studied with emphasis on the effects on unaged and aged adhesion of compound formulation variations. A series of 16 test compounds was formulated in which the levels of sulfur, accelerator, stearic acid, zinc oxide and cobalt salt were varied. Adhes…
Raman spectra of compacted fused silica are presented. Fused silica was sujected to a pressure of 9.0 GPa for 1 hr at 23 °C. The density of the compacted silica was 2.40 g cm−3 compared to 2.22 g cm−3 for the uncompacted glass. Various interesting features of the spectrum are discussed. (AIP)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective functionalization of doubly coordinated flexible chainsRonald Breslow, Raghavan Rajagopalan, and Joshua SchwarzCite this: J. Am. Chem. Soc. 1981, 103, 10, 2905–2907Publication Date (Print):May 1, 1981Publication History Published online1 May 2002Published inissue 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoresponsive polymers. 3. Reversible solution viscosity change of poly(methacrylic acid) having spirobenzopyran pendant groups in methanolAkira Menju, Koichiro Hayashi, and Masahiro IrieCite this: Macromolecules 1981, 14, 3, 755–758Publication Date (Print):May 1, 1981Publ…
The dielectric permittivity, optical transmission spectrum and temperature dependence of resistance were investigated in single crystals of Bi 4 Ti 3 O 12 and BaBi 4 Ti 4 O 15 . It is found that the dielectric anomalies previously reported below the Curie temperature are due electron space charges of inhomogeneous dis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of iron porphyrins with methyl radicalsD. Brault and P. NetaCite this: J. Am. Chem. Soc. 1981, 103, 10, 2705–2710Publication Date (Print):May 1, 1981Publication History Published online1 May 2002Published inissue 1 May 1981https://pubs.acs.org/doi/10.1021/ja00400a0…
The intensity of scattered light at angles between 30 degrees and 120 degrees has been measured during the heat gelation lag phase of rat tail tendon collagen. As previously reported, the intensity at a scattering angle of 90 degrees does not change during the lag phase of gelation, whereas during this period, the int…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational studies of (tetraphenylporphyrinato)cobalt(II) and its adducts with carbon monoxide, nitric oxide, and oxygen in gas matrixesMuneteru Kozuka and Kazuo NakamotoCite this: J. Am. Chem. Soc. 1981, 103, 9, 2162–2168Publication Date (Print):May 1, 1981Publication Hist…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTHomogeneous nucleation and glass transition temperatures in solutions of lithium salts in water-d2 and water. Doubly unstable glass regionsC. A. Angell, E. J. Sare, J. Donnella, and D. R. MacFarlaneCite this: J. Phys. Chem. 1981, 85, 11, 1461–1464Publication Date (Print):May 1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation of three-dimensional elastic constants of polymer crystals. 3. α and γ Forms of nylon 6Kohji Tashiro and Hiroyuki TadokoroCite this: Macromolecules 1981, 14, 3, 781–785Publication Date (Print):May 1, 1981Publication History Published online1 May 2002Published ini…
The interrelationship between the various chloride ion containing compounds associated with the corrosion of iron in a marine environment is reviewed, and their role in corrosion promotion is evaluated as a basis for the selection of conservation techniques with a high probability of success.