Materials Literature
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The method of preirradiation grafting of acrylic acid and methacrylic acid onto polyethylene films was studied. The trapped radicals and hydroperoxides or diperoxides appeared to be able to induce graft polymerization. Mohr's salt was added to depress homopolymerization. The influences of crystallinity, dosage, and st…
A simple model which accounts for the effects of the electron-molecular vibration (e-mv) interaction on the vibrational spectra of regular mixed stack charge-transfer complexes is presented and compared with that working for dimerized mixed stack compounds. The proposed interpretative scheme makes the spectra a powerf…
A pyro-electric technique is developed which allows the measurement of the dielectric response near the A*-C* phase transition in ferroelectric liquid crystals. The temperature dependence of the elastic modulus K θ(T) corresponding to the molecular tilt in smectic layers is calculated from the experimental data. Direc…
Using microlithographic techniques to define the Ag sensitized area, the lateral profile of Ag diffusion in GexSe1−x (x≊0.1) glass is made directly visible with an optical microscope. Experimental measurements have verified that Ag photodoping in Ge0.1Se0.9 glass obeys Fick’s diffusion law with a constant diffusivity.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and crystal structure of a diamagnetic copper(II) trichloroacetate complex containing a nitroxyl radical ligandLeigh C. Porter and Robert J. DoedensCite this: Inorg. Chem. 1985, 24, 7, 1006–1010Publication Date (Print):March 1, 1985Publication History Published o…
A Landau theory is developed for uniaxial and biaxial nematic phases, based on the order parameter S αβ ij . Four nematic phases, two uniaxial and two biaxial, are predicted and their symmetries are discussed. A typical phase diagram is presented and comparisons are made with earlier mean field theories and Landau the…
As an example of the free radical polymerization reactor we have conducted a theoretical study of the high pressure polyethylene tubular reactor with cooling from the jacket. The plug flow model including the axial dispersion is considered with as well as without the steady state assumption for the active intermediate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of boron substituents in borirenes, boriranes, and boranes. The energies of B-X bondsPeter H. M. Budzelaar, Alexander J. Kos, Timothy Clark, and Paul von Rague SchleyerCite this: Organometallics 1985, 4, 3, 429–437Publication Date (Print):March 1, 1985Publication His…
The deep violet, crystalline binuclear manganese complex 3 is formed in ca. 30% yield on irradiation of a mixture of the tricarbonyl complex 1 and thiirane S-oxide 2. The Mn–S distances are short (ca. 212 pm) and the SO bond is hardly longer (150.4 pm) that that of free SO. There is no bonding interaction between the…
The use of large volume sealed stainless steel capsules has allowed the measurement of a transition temperature in wool at a range of moisture contents using differential scanning calorimetry. Aged wool showed an endothermic peak that disappeared after cooling from above the transition temperature, but was restored wi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBehavior of automotive noble metal catalysts in cycled feedstreamsHideaki Muraki, Hirofumi Shinjoh, Hideo Sobukawa, Kohji Yokota, and Yoshiyasu FujitaniCite this: Ind. Eng. Chem. Prod. Res. Dev. 1985, 24, 1, 43–49Publication Date (Print):March 1, 1985Publication History Publ…
The syntheses of several 4-n-alkyl-, 4-[2-(trans-4-n-alkylcyclohexyl)ethyl]-, 4-[2-(4-n-alkylphenyl)ethyl]- and 4-n-alkoxy-4′-cyano-2′-fluorobiphenyls and -4′-cyano-2-fluorobiphenyls are presented and the transition temperatures for these compounds are reported and discussed. In the alkylcyanobiphenyls, a 2-fluoro-sub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMeasurement of the correlation hole in homogeneous block copolymer meltsFrank S. BatesCite this: Macromolecules 1985, 18, 3, 525–528Publication Date (Print):March 1, 1985Publication History Published online1 May 2002Published inissue 1 March 1985https://pubs.acs.org/doi/10.1…
Abstract not Available.
A review is given of the phenomenological description, the experimental determination and the theoretical considerations and calculations of the anchoring energy in liquid crystals. The order of magnitude of the anchring energy is also compared with the bulk and interfacial energies of liquid crystals.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly[p-(formyloxy)styrene]: synthesis and radiation-induced decarbonylationJean M. J. Frechet, Theodore G. Tessier, C. Grant Willson, and Hiroshi ItoCite this: Macromolecules 1985, 18, 3, 317–321Publication Date (Print):March 1, 1985Publication History Published online1 May…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe clusters [Co8S6(SPh)8]4-,5-: preparations, properties, and structural relationship of near-cubic Co8(.mu.4-S)6 cores to the clusters in synthetic pentlanditeG. Christou, K. S. Hagen, J. K. Bashkin, and R. H. HolmCite this: Inorg. Chem. 1985, 24, 7, 1010–1018Publication D…
The phase-matched generation of the optical second harmonic was investigated in the chiral smectic C* phase of a classical ferroelectric liquid crystal (DOBAMBC). The phase-matching was achieved either by incidence angle or by temperature tuning. The temperature behaviour of the second order nonlinear susceptibility w…
Electron microscope observations of domain configurations associated with the incommensurate phases of quartz and aluminum phosphate are presented and successfully interpreted in terms of a theoretical model.
The fraction of four‐coordinated boron was observed to increase from 10% in a rapidly cooled aluminum borosilicate glass fiber to 16% in the same fiber after it was annealed; the refractive index also increased. The index of the annealed fiber agreed with that of the bulk glass. Crystallization was not observed in the…