Materials Literature
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An in situ study of strain-induced crystallization in an amorphous poly(ethylene terephthalate) (PET) film was carried out by using wide-angle X-ray diffraction with synchrotron X-rays. Results indicated that the mesophase was developed during stretching, immediately upon necking below T g . A sharp meridional peak wa…
Abstract The article discusses the development and properties of supramolecular polymers based on quadruple hydrogen bonds between self‐complementary ureidotriazine (UTr) and ureidopyrimidinone (UPy) functional groups. The high association constant with which these groups dimerize leads to polymers with a high degree…
The concrete of pavements must resist the climatic conditions, heavy traffic, chemical agents or any other type of aggressive agent. A methodology for characterizing materials that would influence concrete durability was developed considering chemical and physical factors. This methodology allows the consideration of…
In this work we characterize a new material composite, formed with a polyester and crushed white marble mixture. The final purpose is double: to obtain a material for applications sufficiently competitive after an economic viability study, increasing the yield of the main commodity, using waste marble and improving th…
The company Vetrotex in collaboration with the Department of Architectural Constructions and their control (E.U.A.T) of the Polytechnic University of Madrid, have deeply researched on plaster strengthened with glass fiber E. The conclusions of the influence of the dispersibility of glass fiber in the compound mechanic…
The traditional methods of measuring viscosity with rotational viscometers, i.e. cone-plate and concentric cylinder systems, are often not suitable for suspensions. To be able to measure viscosity on suspensions mixer viscometers have been developed. In this study a new design of a helical ribbon impeller has been eva…
Since the beginning of the XX century it has been recognized that the bending strength of timber is affected by the size of the specimen. In the present work the influence of depth (h) and thickness (t) on the characteristic bending strength (fk) of both Scot (Pinus sylvestris) and Laricio (Pinus nigra) pine Spanish g…
The European Standard EN 197-1:2000 for Cement, prepared by CEN/TC 51, is from now (2002-04-01) onwards, compulsory in all the countries of the European Union. It has been considered suitable to expose some details on the historical development of the steps and difficulties during the elaboration of the standard ENV 1…
Previous studies involving rheological measurement of semi-solid foods have reported a large amount of data variability, but have focused little on understanding the cause of such variability. This project examined whether differences in normal force have an effect on the variability of rheological measurements. Exper…
The rheological behavior of model suspensions with the silicone oil M20000 and different concentrations of Cab-o-sil TS 720 resp. Durcal 5 are compared. The increase of the Cab-o-sil concentration changes the flow behavior of the suspension from shear-thinning, to pseudoplastic, and to plastic flow behavior. The first…