Results 41 to 50 of about 18,640 (151)
Polyurea Aerogels: Synthesis, Material Properties, and Applications
, 2022 Polyurea is an isocyanate derivative, and comprises the basis for a well-established class of polymeric aerogels. Polyurea aerogels are prepared either via reaction of multifunctional isocyanates with multifunctional amines, via reaction of ...
Nicholas Leventis
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Inflation and labor market flexibility: The squeaky wheel gets the grease [PDF]
Inflation can "grease" the wheels of the labor market by relaxing downward wage rigidity but it can also increase uncertainty and have a negative "sand" effect.
Panizza, Ugo, Loboguerrero, Ana Maria
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Synthesis and characterization of polyurea nanocomposites
, 2019 Polyurea nanocomposites have attracted increasing attention. In this article, in order to study the thermal properties and mechanical properties of polyurea composites, polyurea nanoparticles with different content of silicon carbide (SiC) nanoparticles (
LIU, Q
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STUDY OF EFFECT OF DIFFERENT ORIGIN PIGMENTS ON FRICTIONAL PROPERTIES OF POLYUREA GREASES
IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA, 2018 In connection with development of techniques and technologies and unification and substitution the most important task for Russia is to solve the problem of development and introduction of modern high-quality domestic greases. The most suitable in this respect is greases with the urea derivatives thickener — organic compounds containing in molecules ...
Vladimir N. Koshelev +6 more
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Is corruption an efficient grease? [PDF]
This paper tests whether corruption may act as an efficient grease for the wheels of an oth-erwise deficient institutional framework. We analyze the interaction between aggregate efficiency, corruption, and other dimensions of governance for a panel of ...
Méon, Pierre-Guillaume, Weill, Laurent
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The ROF+ methodology for grease life testing [PDF]
, 2013 Very often, the service life of grease lubricated rolling bearings is determined by the so called “grease life”. This can be tested on R0F test rigs, which have been available for this since more than 40 years.
van den Kommer, A. +3 more
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Multi‐steps synthesis and properties of tetraurea grease
, 2011 PurposeModern technology is giving some new requirements for the lubricating grease, and there are also some weaknesses for the existing diurea grease, especially its lower anti‐shear stability. This paper aims to address this issue.
Sun Hongwei, Liu Lei
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, 2023 The production of polyurea, an industrial polymer, is limited by the overwhelming cost and technical intricacies. This thesis explores two new ways adapted for polyurea fabrication. Electrospinning was tailored to produce transparent, flexible thin films
SHEIK AMBARINE BANON AUCKLOO (16466460)
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Polyurea and Polyurea Composites for Stress-wave Energy Management [PDF]
, 2016 Mechanical properties of elastomeric polymers are highly sensitive to the loading rate, temperature and pressure in their transition zone between glassy state and rubbery state.
Jia, Zhanzhan
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Identifying inflations grease and sand effects in the labor market [PDF]
An effort to distinguish inflations distortionary effects from its facilitation of adjustments to shocks when wages are rigid downward. It uses the following identification strategy: inflation-induced deviations among employers mean wage changes ...
Mark E. Schweitzer, Erica L. Groshen
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