Materials Literature
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Abstract A quenched ethylene‐hexene copolymer was annealed in the temperature range of 86 to 127°C. The morphological changes were monitored by differential scanning calorimetry (DSC) and density. The slow crack growth resistance tested at 80°C was a maximum at an annealing temperature of 113°C and a minimum of 123°C.…
Abstract The surface and mechanical properties of thin Cr films play an essential role in microphotolithographic processes in which an inorganic photoresist based on vacuum‐evaporated As 2 S 3 is used as a light‐sensitive system. The present paper reports some XPS data about thin chromium layers obtained by thermal ev…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-valent iron porphyrins. NMR evidence for .pi.-anion-radical character in two-electron-reduced iron(III) meso- or .beta.-pyrrole-substituted porphyrinsKazuya Yamaguchi and Isao MorishimaCite this: Inorg. Chem. 1992, 31, 15, 3216–3222Publication Date (Print):July 1, 1992Pu…
Abstract Two common problems and probable solutions in the TG-DTG analysis of unknown elastomer vulcanizates have been discussed. The first problem concerns the difficulty in quantitatively determining the oil and elastomer in compounds where their volatilization temperature ranges overlap. After a review of the publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExactly alternating silarylene-siloxane polymers. 9. Relationships between polymer structure and glass transition temperaturePetar R. Dvornic and Robert W. LenzCite this: Macromolecules 1992, 25, 14, 3769–3778Publication Date (Print):July 1, 1992Publication History Published…
1 MeV electron irradiation has been performed in degenerate, n-type (n≂2×1017 cm−3), molecular beam epitaxial GaAs layers, and Hall effect measurements have been carried out during the irradiation in order to get accurate defect production data. The results have been fitted with statistical models, and are most consis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphological study of phase transition behavior in syndiotactic polystyreneYing Kang Wang, John D. Savage, Decai Yang, and Shaw L. HsuCite this: Macromolecules 1992, 25, 14, 3659–3666Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Publishe…
Abstract Reactive melt processing of different types of diamines with polyethylene containing carboxylic acid groups and polystyrene containing anhydride groups was carried out. The reactivity of primary, secondary, and tertiary diamines with these acid polymers was determined using various techniques. Molecular weigh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction and reactions of triplet CS: matrix infrared and ultraviolet spectra of C2S2Robert B. Bohn, Yacine Hannachi, and Lester AndrewsCite this: J. Am. Chem. Soc. 1992, 114, 16, 6452–6459Publication Date (Print):July 1, 1992Publication History Published online1 May 2002P…
The present study reports the use of monochromatic, high resolution x-ray photoelectron spectroscopy to investigate the evolution of the s and p bands of select metals, and the resulting O(2p) bands of their oxides as the process of oxidation (or reduction) sequentially occurs. Those metals in the groups I B, II B, II…
The intrinsic susceptibility of stainless steels to corrosive attack by barnacles is a widely recognized phenomenon. Corrosion usually manifests itself in crevices, corresponding to the base of the barnacles’ shell. The purpose of this investigation was to elucidate a mechanism for this corrosion phenomenon. Based on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure of magnesium sesquicarbideHelmer Fjellvaag and Pavel KarenCite this: Inorg. Chem. 1992, 31, 15, 3260–3263Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published inissue 1 July 1992https://pubs.acs.org/doi/10.1021/ic00041…
Abstract The status of advanced nonlinear optical materials is reviewed with regard to the requirements implied by their respective applications. Although many functions utilizing nonlinear optical (NLO) materials have been demonstrated in research laboratories, only a few components have found a place in real systems…
The free energy of a nematic film, placed between two isotropic media, does not depend on the azimuthal angle if the two interfaces are parallel. It is shown that in the general case of nonparallel bounding, a particular value of the azimuthal orientation is energetically preferable. The directions of this geometrical…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkali metal catalyzed carbon dioxide gasification of carbonToshimitsu Suzuki, Hiroyuki Ohme, and Yoshihisa WatanabeCite this: Energy Fuels 1992, 6, 4, 343–351Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published inissue 1 July 1992http…
The anodic polarization behavior of copper was studied in the pH range 9.4 to 10.8, where pH was controlled (buffered) by additions of either borate, bicarbonate/carbonate, ammonia, or sodium hydroxide. Several solutions contained either 1 M sulfate, 1 M chloride, or 5 M chloride. Passivation effects were observed in…
We measured the Raman spectrum associated with the E 2 ‐TO quasi and LO quasi modes of 6H‐SiC particles as a function of hydrostatic pressure using a diamond anvil cell. The results of this calibration experiment were used to analyze the residual stress in 6H‐SiC particles within Al 2 O 3 /SiC composites with 12%, 20%…
Before conducting polymers can be employed in many applications, some of the intrinsic properties of these materials need to be better understood. An overview of the research and development of conducting polymers being undertaken at UTS is presented. Because conducting polymers are difficult to process once fabricate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of poly(ethylene oxide) with heterobifunctional reactive groups at its terminals by an anionic initiatorMasayuki Yokoyama, Teruo Okano, Yasuhisa Sakurai, Akira Kikuchi, Nobuyuki Ohsako, Yukio Nagasaki, and Kazunori KataokaCite this: Bioconjugate Chem. 1992, 3, 4, 2…
Deterioration in the insulation performance of extra-high voltage XLPE (cross-linked polyethylene) cables is believed to be attributable to the deterioration caused by partial discharges. After using an XLPE cable to investigate the behavior of partial discharges under various adverse conditions, the authors succeeded…