Materials Literature
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The Voigt function has been incorporated as a peak-shape description into a program for the refinement of constant-wavelength X-ray and neutron diffraction patterns. The results obtained for neutron diffraction are encouraging and indicate that the Voigt function describes the symmetrical component of the profile peak…
Abstract The accuracies of the approximation of the temperature integral of the Arrhenius law proposed by Coats and Redfern(CR), Doyle(D), Gyulai and Greenhow(GG), and MacCallum and Tanner(McT) have been tested. It has been demonstrated that these methods (only with the exception of the MacCallum and Tanner procedure)…
The physical principles underlying the oscillatory behavior of minute gas bubbles in liquids exposed to ultrasound are reviewed. Results from mathematical analyses suggest that these oscillations sometimes become unstable leading to transient cavitation in which a bubble violently collapses during a single acoustic ha…
Treatment of polyester, nylon 66, cotton, and wool fabrics with aqueous solutions of polyethylene glycol phase change materials and of plastic crystal compounds by a conventional pad-dry procedure produced modified fabrics with thermal storage and release properties 2-2.5 times greater than those of untreated fabrics…
Abstract It is shown that the Frame's method (also, Le Verrier‐Faddeev's method) for characteristic polynomials of chemical graphs can be extended to periodic graphs and structures. The finite periodic structures are represented by cyclic structures in the Born‐von Kárman boundary condition which leads to complex matr…
How fast can drug molecules randomly escape from a polymer matrix? This important question is of both scientific and practical importance, as increasing emphasis is placed on design considerations that can be addressed only if the physics of drug release is better understood. We study this problem using high accuracy…
The extended Maier-Saupe theory of binary nematics developed by Palffy-Muhoray et al. is extended to a wider range of interactions. This theory predicted that the biaxial phase is thermodynamically unstable in the absence of an external field, if the interspecies interaction strength satisfies the geometric mean rule.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLaser spectroscopic and x-ray structural investigation of europium(III)-oxydiacetate complexes in solution and in the solid stateMichael Albin, Robert R. Whittle, and William DeW. Horrocks Jr.Cite this: Inorg. Chem. 1985, 24, 26, 4591–4594Publication Date (Print):December 1,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeformation of microphase structures in segmented polyurethanesC. R. Desper, N. S. Schneider, J. P. Jasinski, and J. S. LinCite this: Macromolecules 1985, 18, 12, 2755–2761Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissu…
A diametral‐compression test that features disk specimens with chevron notches was developed and applied to measure fracture toughness (K lc ) of three ceramics. Fracture–toughness values calculated from the fracture loads and a compliance analysis were in good agreement with values measured by other fracture–mechanic…
Abstract Lithiumdihydrogenphosphat, LiH 2 PO 4 , wird beim Erhitzen zu Lithiumpolyphosphat, (LiPO 3 ) n · H 2 O, dehydratisiert [2–5]. Mit Lithiumcyclohexaphosphat, Li 6 P 6 O 18 , angeimpftes LiH 2 PO 4 wird dagegen strukturkontrolliert zu reinem Li 6 P 6 O 18 dehydratisiert. Lithiumhydrogendiphosphat, Li 3 HP 2 O 7…
Explicit expressions are obtained for the stress and displacement fields near the tip of a rigid line inhomogeneity subjected to an inclined loading. It is shown that the tip stress field, with a square-root singularity, differs in characteristics from that of a slit crack. New designations for the mode of deformation…
Abstract The vibrational modes of clay minerals in aqueous suspension are uniquely accessible to Raman spectroscopy, but this potentially powerful approach has not been applied heretofore to study clays in aqueous samples. In this paper, Raman spectra in the 100- to 4000-cm −1 region were obtained for kaolinite in aqu…
Abstract The structure of nylon 6 fibers is analyzed by x‐ray diffraction. Our results suggest that only two forms of nylon 6, α and γ, along with lattice distortion and crystallite size, are sufficient to explain the whole range of crystalline structures observed in nylon 6. The γ phase is the preferred initial form…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe structure of the copper/zinc oxide catalyst by an in-situ EXAFS studyKazuyuki Tohji, Yasuo Udagawa, Takanori Mizushima, and Akifumi UenoCite this: J. Phys. Chem. 1985, 89, 26, 5671–5676Publication Date (Print):December 1, 1985Publication History Published online1 May 200…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(benzimidazole) synthesis by direct reaction of diacids and diaminesMitsuru Ueda, Masaki Sato, and Amane MochizukiCite this: Macromolecules 1985, 18, 12, 2723–2726Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 D…
A model for laser melting of carbon at high temperatures to form liquid carbon has been developed. This model is solved numerically using experimental data from laser irradiation studies in graphite consistent with a melting temperature for graphite of 4300 K. The parameters for high-temperature graphite are based on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of phase equilibria in block copolymer-homopolymer blendsMark Douglas Whitmore and Jaan NoolandiCite this: Macromolecules 1985, 18, 12, 2486–2497Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985htt…
Intrinsic thermal clothing insulation and surface air insulation were measured on human subjects by the use of indirect calorimetry. Four male clothing ensembles (0-1-1 -8 clo) and three female clothing ensembles (0-2-1-2 clo) were investigated. Using the standing position as a reference, the influence of sitting, bic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudy of intramolecular sensitization and other excited-state pathways in orthometalated azobenzene complexes of palladium(II)Yasuo Wakatsuki, Hiroshi Yamazaki, Paul A. Grutsch, Mahalingam Santhanam, and Charles KutalCite this: J. Am. Chem. Soc. 1985, 107, 26, 8153–8159Publi…