基于噻二唑型水基润滑油防锈剂的合成,表征和应用

以顺丁烯二酸酐、5-甲基-2-巯基噻二唑、二乙醇胺为原料,经加成与酰胺化两步反应,合成了新型的绿色环保型水基防锈剂。在浓H2SO4和二甲苯作用下,控制两步反应温度分别为50-55℃和115-120℃,n(顺丁烯二酸酐):n(5-甲基-2-巯基噻二唑)∶n(二乙醇胺)=1∶1.1∶1.1,产物收率达59%。产品水溶性好,抗硬水、耐水解能力强,在pH值5～10水溶液均能稳定存在,在水中对铁等金属有优良的防锈性能,适用于水基金属防锈液等水基型体系。     

防锈膜的研制

防锈膜的研制段世清李天政林冰（化学系）我们曾研制了一种气相防锈纸［１］，用于焊丝等的防锈，其防锈期达三年以上，但是焊丝用防锈纸包裹后还必须用塑料膜封装，这样增加了成本，还看不见焊丝的面貌．现在，我们研制了防锈膜，对金属制品的防锈效果好，是防锈纸技术的...     

环保型磷酸酯型水基防锈剂的研制

以丙烯酸、5-甲基-2-巯基噻二唑、二乙醇胺和五氧化二磷为原料,合成了一种新型的绿色环保型水基防锈剂。确定了最佳合成条件并用显微熔点测定仪对中间体的熔点进行了测试。采用失重法对合成的化合物的防锈性能进行测试。测试结果表明:在1 mol/L HCl溶液中目标化合物对A3钢有较好的缓蚀性能,其最佳浓度均为20×10-6(ppm)。且产品水溶性好,抗硬水、耐水解能力强,适用于水基金属防锈液等水基型体系。     

乳化液防锈性评价方法的试验研究

根据冷轧乳化液使用时的具体条件,提出了一套评价乳化液防锈性的新方法,并用该方法对乳化液防锈性进行了试验.试验结果说明,使用后的乳化液防锈性下降;轧后带卷的温度可以加速带钢生锈;中间退火后的带钢轧制时防锈性变差;防锈性好的乳化液与防锈性差的乳化液配比,对防锈性差的乳化液有利,最佳配比为3:1.工厂实践证明,试验结果是正确的,该评价方法可行.     

乳化液防锈性评价方法的试验研究

根据冷轧乳化液使用时的具体条件，提出了一套评价乳化液防锈性的新方法，并用该方法对乳化液防锈性进行了试验。试验结果说明，使用后的乳化液防锈性下降；轧后带卷的温度可以加速带钢生锈；中间退火后的带钢轧制时防锈性变差；防锈性好的乳化液与防锈性差的乳化液配比，对防锈性差的乳化液有利，最佳配比为3：1。工厂实践证明，试验结果是正确的，该评价方法可行。     

碱式亚磷酸-磷酸钾锌无毒防锈颜料的研究

作者利用亚磷酸根和磷酸根防锈性能的协同效应,合成了一种新型的无毒防锈颜料——碱式亚磷酸-磷酸钾锌。它们的防锈性能超过了亚磷酸锌、磷酸锌,甚至超过铅丹。测定了它们的组成、结构及技术指标,并对其防锈机理进行了初步探讨。     

土法创先进,丝线社制成气相防锈纸

我们黄岩城关丝线社职工,在毛主席“自力更生”、“艰苦奋斗”伟大方针指引下,破除迷信,解放思想,发扬无产阶级不断革命精神,克服各种困难,因陋就简,土法上马,试制成功了最新型的黑色金属防锈材料——气相防锈剂(纸)。经鉴定证实:防锈性能良好,有效防锈期可达二年以上。使用该纸防锈不仅包装手续简便,并可解决无法上油、打腊的贵重仪表的防锈问题,并可为国家节约大量油料。目前我社已经投入成批生产,支援了工业战线和国防工业方面的迫切需要,为我省防锈事业填补了一个空白点。这是毛主席无产阶级革命路线的伟大胜利,是无产阶级文化大革命的丰硕成果。我社共有职工十七人,平均年龄在五十岁以上,文化水平大多在初小,历年来都是手工纺制丝线。要制造气相防锈剂(纸),在技术力量和设备方面,都存在许多困难。但我们学习了     

轴承产品的防锈技术分析

轴承在各种场合得到广泛的应用，而作为一种精密的机械产品，一旦锈蚀，会对其使用带来不良的影响。因此必须要高度重视轴承的防锈工作。轴承的防锈包括工序间的防锈和成品的防锈两个方面。一般对成品的防锈比较重视，防锈效果也较好。而工序间的防锈由于观念和成本等方面的原因，不太被重视。因此采用简单方便，高效低成本的防锈方法就显得尤为重要。     

无缝钢管浸蜡及其防护效果

本文介绍了无缝钢管热浸蜡防锈工艺,给出了浸蜡钢管的抗大气腐蚀试验结果,并对此进行了经济分析。结果表明,浸蜡防锈法不仅操作简便,成本低,而且防锈效果好,对提高无缝钢管表面质量和延长钢管使用寿命有实用价值。     

巯基丙酸及其酯的制备和红外光谱研究

本文研究了巯基丙酸和巯基丙酸-2-乙基已基酯的制备,探讨了制备反应的各影响因素;测定了化合物的有关物化常数;对巯基丙酸及其酯的红外谱图进行了讨论分析;报道了巯基丙酸-2-乙基已基酯的红外光谱、比重和折光率。巯基丙酸的熔点为17℃,折光率1.4922;巯基丙酸-2-乙基已基酯比重0.9912,其折光率1.4635。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the