Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear magnetic resonance studies on electrochemically prepared poly(3-dodecylthiophene)Masaaki Sato and Hisayuki MoriiCite this: Macromolecules 1991, 24, 5, 1196–1200Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 Mar…
A series of segmented polyurethanes (SPUs) containing various polyol soft segments was prepared and their resistance to oxidative degradation was investigated after aging in AgNO3 solution. The SPU with the polyether soft segment showed a large reduction in mechanical strength after exposure to the oxidative environme…
Finnis-Sinclair (F-S) type many-body potentials have been constructed for eight hexagonal metals: Co, Zr, Ti, Ru, Hf, Zn, Mg and Be. The potentials are parameterized using cubic splines and fitted to the cohesive energy, unrelaxed vacancy formation energy, five independent second-order elastic constants and two eauili…
Caflisch & Luke (1985) showed that, owing to the long range of the hydrodynamie interactions, the variance of the sedimentation velocity in a random suspension with uniform probability for the positions of the particles is divergent in the sense that it grows without bound as the macroscopic linear dimension of th…
Two component mixtures containing liquid crystalline diacrylates and liquid crystal molecules with no reactive groups have been made. Upon photopolymeriz-ation of the mixtures anisotropic networks containing liquid crystal molecules which were not chemically attached to the networks were created. In these systems the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMutually interpenetrating inorganic-organic networks. New routes into nonshrinking sol-gel composite materialsMark W. Ellsworth and Bruce M. NovakCite this: J. Am. Chem. Soc. 1991, 113, 7, 2756–2758Publication Date (Print):March 1, 1991Publication History Published online1 M…
Probe beam deflection (PBD) was used to monitor the ion exchange between polymer film and bulk electrolyte during the redox reaction in polyaniline in aqueous electrolyte ( , , ). The PBD results clearly show that protons as well as anions are exchanged during the first oxidation process. Protons are exchanged at pote…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComb-burst dendrimer topology: new macromolecular architecture derived from dendritic graftingDonald A. Tomalia, David M. Hedstrand, and Michael S. FerrittoCite this: Macromolecules 1991, 24, 6, 1435–1438Publication Date (Print):March 1, 1991Publication History Published onl…
The Alcaligenes eutrophus genes for beta-ketothiolase, NADPH-dependent acetoacetyl-CoA reductase and poly(beta-hydroxybutyric acid) synthase (PHB synthase) which comprise the three-step PHB-biosynthetic pathway, were cloned. Molecular studies revealed that these genes are organized in a single operon. The A. eutrophus…
This paper constitutes a compilation as well as an interpretation of the present state of knowledge about the different microstructures developed in the interface areas of concrete, that is, the cement paste-aggregates, the cement paste-reinforcement, the cement paste-fiber, etc. The Chemical reactions taking place in…
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The paper describes, in chronological order, the different competent Authorities in Spain and the documents issued by them regarding Cement Regulations and Standards. The origin of the early cement quality Rules is referred to, the issuing of Regulations by the Public Bodies and finally the adoption of National Standa…
The natural stone sector, like any other industrial sector, requires the technological support of standardization for its promotion and development. As a consequence of the creation of AENOR, CTN 22 "Mining and Explosives" consisting of seven subcommittees, was founded. Subcommittee 7 "Natural Stone" is composed of re…
The different aspects related to the deterioration and conservation of stone, used as a construction material, are reviewed in this article. The petrographical characteristics and physical properties which control the durability of stone material are stated. The importance of the voids and the properties more directly…
The evidence that the concrete is not a material for ever was noticed from the beginning of its industrial use. In the present work, the author describes the studies carried out during the last century and the early ages of the present one, mainly devoted to the study of the durability in sea water. At the present day…
El día 21 de enero pasado tuvo lugar, en la Sala de Conferencias del Instituto de Ciencias de la Construcción "Eduardo Torreja", el Acto de Entrega de Medallas y Nombramiento de Miembros de Honor del Instituto. La Sesión comenzó a las 10 horas con unas palabras de presentación pronunciadas por D. Rafael Blázquez, Dire…
This article abridges the investigation line followed to demonstrate and to evaluate the physical phenomenon of the hygroscopic fatigue dimensional. For such intention has been used the construction of isothermals for 20 ºC and the establishment of oldness coefficients to evaluate such process.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of the amorphous phase in crystallizable polymers: poly(ethylene terephthalate)N. S. Murthy, S. T. Correale, and H. MinorCite this: Macromolecules 1991, 24, 5, 1185–1189Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published in…