Influence of the tacticity of poly(methyl methacrylate) on its miscibility with chlorinated polymers
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The Effect of Alkaline-Etch Pretreatment on the Pitting Corrosion of Wrought Aluminum
Pitting corrosion of aluminum alloys is sensitive to the type of surface treatment used prior to a corrosion test. In particular, significant differences in the pitting behavior are observed between the as-received and etched surfaces of several wrought alloys. It is shown that the as-received surface is generally mor…
Oligomeric structure of p21 ras proteins as determined by radiation inactivation.
Using radiation inactivation we determined that p21 ras proteins exhibit an oligomeric target size when assayed both structurally and functionally. Similar target sizes of p21 in ras-transformed cells and in purified preparations of the protein suggested that its structure is homo-oligomeric. p21 monomers were destroy…
Glyceryl polyphosphazenes: synthesis, properties, and hydrolysis
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlyceryl polyphosphazenes: synthesis, properties, and hydrolysisHarry R. Allcock and Sukky KwonCite this: Macromolecules 1988, 21, 7, 1980–1985Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://pubs.acs.org…
A new class of cation conductors: polyphosphazene sulfonates
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new class of cation conductors: polyphosphazene sulfonatesS. Ganapathiappan, Kaimin Chen, and D. F. ShriverCite this: Macromolecules 1988, 21, 7, 2299–2301Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https:…
Estimation of the Rh-Rh bond dissociation energy in the (octaethylporphyrinato)rhodium(II) dimer by proton NMR line broadening
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEstimation of the Rh-Rh bond dissociation energy in the (octaethylporphyrinato)rhodium(II) dimer by proton NMR line broadeningBradford B. Wayland, Virginia L. Coffin, and Maria D. FarnosCite this: Inorg. Chem. 1988, 27, 15, 2745–2747Publication Date (Print):July 1, 1988Publi…
Benzocyclobutene in polymer synthesis. I. Homopolymerization of bisbenzocyclobutene aromatic imides to form high‐temperature resistant thermosetting resins
Abstract A series of new bisbenzocyclobutene‐terminated aromatic imide monomers has been synthesized from the condensation reaction of 4‐aminobenzocyclobutene and the perspective dianhydride in refluxing acetic acid/toluene. The differential scanning calorimetric studies of the foregoing monomers indicated that polyme…
XPS characterization of ultrafine Si 3 N 4 powders
Abstract The mechanical properties of Si 3 N 4 based ceramic bodies are largely controlled by the phases formed on the grain boundaries during sintering. For this reason determination of the state and the chemical composition of the surface of the starting Si 3 N 4 powder is of prime theoretial and practical importanc…
Emission characteristics and photostability of N,N'-bis(2,5-di-tertbutylphenyl)-3,4:9,10-perylenebis(dicarboximide)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEmission characteristics and photostability of N,N'-bis(2,5-di-tertbutylphenyl)-3,4:9,10-perylenebis(dicarboximide)El Zeiny M. Ebeid, Samy A. El-Daly, and Heinz LanghalsCite this: J. Phys. Chem. 1988, 92, 15, 4565–4568Publication Date (Print):July 1, 1988Publication History…
Determination of initial Sr isotopic compositions of dolostones from the Burlington-Keokuk Formation (Mississippian); constraints from cathodoluminescence, glauconite paragenesis and analytical methods
Abstract Regionally extensive, fine-grained dolostones from the Mississippian Burlington-Keokuk Fm. comprise two major generations of dolomite that can be distinguished by their cathodoluminescence, chemical compositions, and times of formation. The petrography and geochemistry of glauconite, the predominant clay mine…
Dye sensitization of van der Waals surfaces of tin disulfide photoanodes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDye sensitization of van der Waals surfaces of tin disulfide photoanodesBruce A. ParkinsonCite this: Langmuir 1988, 4, 4, 967–976Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://pubs.acs.org/doi/10.1021/l…
Isothermal crystallization of poly(vinylidene fluoride) in the presence of high static electric fields. I. Primary nucleation phenomenon
Abstract Primary nucleation of poly(vinylidene fluoride) (PVF 2 ) γ‐phase crystals from the melt is affected by the presence of an electric field. Crystallization under the electric field is studied by polarized optical microscopy, thermal analysis, and wide‐angle x‐ray diffraction. Preliminary results indicate that t…
The resonance Raman and visible absorbance spectra of matrix isolated Mn2 and Mn3
The resonance Raman spectrum obtained from manganese containing argon matrices previously assigned to the dimer [M.Moskovits, D.P.DiLella, and W.Limm, J. Chem. Phys. 80, 626 (1984)] is shown to belong to a zero order D3h trimer subject to Jahn–Teller distortions. The actual resonance Raman spectra of the dimer in both…
Novel synthesis of aromatic polyamides by palladium-catalyzed polycondensation of aromatic dibromides, aromatic diamines, and carbon monoxide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel synthesis of aromatic polyamides by palladium-catalyzed polycondensation of aromatic dibromides, aromatic diamines, and carbon monoxideMasaru Yoneyama, Masaaki Kakimoto, and Yoshio ImaiCite this: Macromolecules 1988, 21, 7, 1908–1911Publication Date (Print):July 1, 198…
Chemical structures and properties of low thermal expansion coefficient polyimides
Abstract The relationships, between chemical structures of various aromatic polyimides and their thermal expansion coefficients, were investigated and the properties of low thermal expansion polyimides were elucidated. Such low values were observed for polyimides obtained from pyromellitic dianhydride or 3,3′,4,4′‐bip…
Pathways for carboxylic acid decomposition on titania
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPathways for carboxylic acid decomposition on titaniaK. S. Kim and M. A. BarteauCite this: Langmuir 1988, 4, 4, 945–953Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://pubs.acs.org/doi/10.1021/la00082a028…
Radiation Effect due to Energetic Oxygen Atoms on Conductive Al-Doped ZnO Films
Al-doped ZnO films were prepared by both RF planar magnetron and RF diode sputterings. The dependence of the ZnO film resistivity on both substrate position and Ar gas pressure was investigated. Energetic oxygen atoms (O atoms) bombarding the film were also observed by time-of-flight apparatus, and the correlation bet…
Density of states in a-Se from combined analysis of xerographic potentials and transient transport data
A density of states diagram for the mobility gap of a-Se is constructed by self-consistent analyses of time-resolved xerographic residual and dark depletion potentials in both undoped and halogen- and alkali-doped Se films. These are then combined with analyses of transient transport data to reveal additional features…
Chemistry of organosilicon compounds. 240. Pentacoordinate allylsilicates: characterization and highly stereoselective reaction with aldehydes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of organosilicon compounds. 240. Pentacoordinate allylsilicates: characterization and highly stereoselective reaction with aldehydesMitsuo. Kira, Kazuhiko. Sato, and Hideki. SakuraiCite this: J. Am. Chem. Soc. 1988, 110, 14, 4599–4602Publication Date (Print):July 1…
Effect of Pore Distribution on Microstructure Development: II, First‐ and Second‐Generation Pores
A sintering model has been developed to predict the consequences of independently varying the grain growth rate in alumina during final‐stage sintering of a microstructure containing both small (first‐generation) and large (inter‐agglomerate second‐generation) pores. The model shows that although it may be thermodynam…