Materials Literature
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利用顶空/气相色谱-质谱（HS/GC-MS）联用法对袋装方便面印刷包装材料中7种挥发性有机物（异丙醇、乙酸乙酯、苯、乙酸丁酯、乙苯、间/对二甲苯、邻二甲苯）进行了检测分析。优化的实验参数为：平衡温度80℃,平衡时间40 min。本方法线性关系良好,7种挥发性有机物的相关系数均大于0.9991,检出限为0.004～0.007 mg/m2;回收率为93%～102%;相对标准偏差≤3.1%。结果表明：未印刷的塑料薄膜中包含异丙醇、乙酸乙酯、乙酸丁酯;印刷后的塑料薄膜中包含这7种物质,其中异丙醇、乙酸乙酯、乙酸丁酯的含量增大;复合塑料膜中异丙醇、乙酸乙酯、乙酸丁酯、间/对二甲苯、邻二甲苯的含量增大,苯和乙苯的含量减小,VOCs总量为0.4…
L’utilisation de séquences RMN de diffusion permet d’étudier les échanges dynamiques du PEO en tant que petite molécule qui diffuse à travers les parois de nanocapsules creuses de PMMA afin de maîtriser son relargage en fonction du milieu. Ces objets nanostructurés étant élaborés via la formation de stéréocomplexe ent…
peer reviewed
The local structure of the hydroxyl species on the rutile TiO2(110) surface has been determined both experimentally and computationally. The experimental study exploited chemical state–specific O 1s scanned-energy mode photoelectron diffraction from a surface exposed to atomic hydrogen, while density functional theory…
We report the physical properties of Ln2Ir2O7 (Ln = Nd, Sm, Eu, Gd, Tb, Dy, and Ho), which exhibit metal-insulator transitions (MITs) at different temperatures. The transition temperature TMI increases with a reduction in the ionic radius of Ln. The ionic radius boundary for MITs in Ln2Ir2O7 lies between Ln = Pr and N…
Рассмотрены прямые и косвенные последствия буксования мобильных машин на поверхностях с малой несущей способностью. Обоснована конструкция блокирования полуоси буксующего колеса, позволяющая повысить тягово-сцепные свойства и безопасность движения колесных машин за счет снижения буксования.
На основании закономерностей изнашивания, изменения и перераспределения нагрузок в процессе эксплуатации разработаны конструкторские решения с целью повышения долговечности и износостойкости трибосопряжений ДВС.
Plasticity of two-dimensional discrete dislocation systems is studied. It is shown, that at some threshold stress level the response becomes stress-rate dependent. Below this stress level the stress-plastic strain relation exhibits power-law type behavior. In this regime the plastic strain rate induced by a constant e…
Приведены результаты экспериментальных исследований процесса формирования компактов из биомассы в канале матрицы пресса. Даны рекомендации по снижению энергозатрат процесса и повышению качества компактов.
This paper is concerned with a diffusion model of phase-field type,\nconsisting of a parabolic system of two partial differential equations,\ninterpreted as balances of microforces and microenergy, for two unknowns: the\nproblem's order parameter and the chemical potential; each equation includes a\nviscosity term and…
Abstract This article intends to provide a basic knowledge of polyurethanes (PUs) and their typologies, with particular reference to starting materials, both from a scientific and a commercial point of view. The possible types of PUs are described in short, together with their methods of production. Safety, ecological…
Abstract Among various nanofillers for composite systems, this article collectively summarizes several carbon‐based fillers and inorganic fillers, both attracting great attention recently in both the academia and industry for the advent of highly integrated electronic device and energy storage systems. The carbon‐base…
All papers published in this volume of Journal of Physics: Conference Series have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
[pt] Emulsões podem ser usadas como agentes de controle de mobilidade em métodos de recuperação avançada de petróleo com o objetivo de obter uma varredura mais uniforme do reservatório. O uso e otimização desta técnica requer um perfeito entendimento do escoamento de emulsões através de meios porosos. O escoamento mac…
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This chapter contains sections titled: Diffusion Bonding Brazing and Other Joining Technologies References
Abstract The last two decades witnessed tremendous research interest on composite materials, especially composite electroceramics. Composite electroceramic materials having flexible fabrication techniques and a wide range of properties are employed for many functional applications. This article gives a brief review of…
[139116-74-8] C16H40N2Se4W (MW 760.18) InChI = 1S/2C8H20N.4Se.W/c2*1-5-9(6-2,7-3)8-4;;;;;/h2*5-8H2,1-4H3;;;;;/q2*+1;;;2*-1; InChIKey = NGSJQYQMZXELQY-UHFFFAOYSA-N (reagent used for transferring selenium in synthetic transformations) Physical Data: mp 120 °C (dec). Solubility: soluble in DMF and CH3CN; moderately solub…
The aim of this study was to investigate the effects of the parameters of the spheronization and the nature of the wetting liquid on the properties of matrix pellets prepared by extrusion and spheronization. Ethylcellulose was used as a matrix former, microcrystalline cellulose as a filler, atenolol as a model active…