热重法测定紫外江辐射固化漆膜的交联度

用热重法分析了紫外光辐射固化漆膜在空气气氛下热失重的过程。结果表明紫外光辐射固化漆膜在１００－２５０℃段的热失重量随漆膜曝光时间的减少而增加，失重量与常用的溶剂的抽提法测定的抽提量基本一致。     

三丙烯酸羟乙酯基磷酸酯在紫外光固化涂料中的应用研究

采用自制的三丙烯酸羟乙酯基磷酸酯作为紫外光固化涂料阻燃型稀释剂,将其添加于芳香族聚醚型聚氨酯二丙烯酸酯配制的紫外光固化涂料中。结果表明,作为活性稀释剂其阻燃效果显著,漆膜性能良好,固化速提高。     

无机纳米粒子在UV粉末涂料中的应用研究

研究比较了纳米TiO2、纳米SiO2及其质量比11的混合物对以自制的LB-1、TG-3树脂为主要成膜物所制得的紫外光固化粉末涂料性能的影响.结果表明,纳米粒子的添加可提高漆膜的硬度、附着力、抗冲击强度,显著地改善漆膜的耐候性能,但同时会使漆膜的光泽度和鲜映性有不同程度的降低;纳米TiO2及纳米TiO2与纳米SiO2质量比为11的混合物的添加量分别为3.0%~5.0%、2.0%~4.0%的质量分数时,可制得综合性能理想的紫外光固化粉末涂料.     

市场角

光固化涂料前景看好光固化（即辐射固化）是一种快速发展的“绿色”新技术，从上世纪７年代至今，辐射固化技术在发达国家的应用越来越普及。和传统涂料固化技术相比，辐射固化具有节能、无污染、高效、适用于热敏基材、性能优异、采用设备小等优点。辐射固化技术从辐射光源和溶剂类型来看可分为紫外线（UV）固化技术、非紫外光固化技术、油性光固化技术、水性光固化技术。辐射固化技术产品中８０％以上是紫外线固化技术（UVCT）。随着人类环保意识增强，发达国家对涂料使用的立法越来越严格，在涂料应用领域，辐射固化取代传统热固化必…     

纳米二氧化硅改性紫外光固化涂料研究

用表面活性剂和硅烷偶联剂对纳米SiO2进行表面处理,将其填充到紫外光固化涂料中,黏度测定和SEM观察表明,SiO2粒子在涂料中分散性好。对涂料进行硬度测定和热失重分析,结果表明：SiO2的加入使涂料固化后的硬度有显著提高,耐热性也有所改善。     

素板种类和附着力底漆对实木地板UV固化涂层耐刮擦性能的影响

采用不同种类和配比的环氧丙烯酸酯、聚酯丙烯酸酯、聚氨酯丙烯酸酯配制了附着力底漆,采用紫外光灯辐照固化漆膜,检测了漆膜的硬度和附着力,研究了素板种类和附着力底漆对实木地板紫外光(UV)固化饰面涂层的强度和耐刮擦性能的影响.结果表明:密度大的紫檀木素板比密度小的番龙眼素板更易得到更硬、更耐刮擦的实木地板饰面涂层;在番龙眼基材上,脂肪酸改性环氧丙烯酸酯与聚酯丙烯酸酯复配得到的底漆提供了硬度最高的漆膜,从而得到最佳的耐刮性.     

紫外光和热双重固化对涂料性能的研究

探讨光、热固化的原理及特点，研究了紫外光和热双重固化对涂料性能的影响．实例表明，应用紫外光和热双重固化可以改善紫外光涂料的性能，特别是提高了涂层的硬度、耐磨性，降低了固化膜的收缩率．     

聚酯改性硅有机漆介电与耐热性能的研究

测量经不同固化条件制备的聚酯改性硅有机漆膜的体电阻率、损耗随温度的变化，并用热重和差热分析研究了固化温度对漆膜介电和耐热性能的影响，获得使漆膜具有最小介质损耗和最高的热分解温度的研制工艺     

丙烯酸酯体系的紫外光固化动力学研究（Ⅰ）

本文采用ＩＲ、ＤＳＣ、ＥＳＲ等手段研究了丙烯酸酯体系的紫外光固化动力学．研究结果表明：体系在３０℃下受紫外光辐射产生的固化反应初期遵循一级动力学方程，后期的固化反应趋于复杂化．     

光固化粉末涂料的发展

紫外光(uv)固化粉末涂料综合了传统粉末涂料和辐射固化技术诸多优点,是涂料工业的前瞻性产品。介绍了紫外光固化粉末涂料的合成、固化机理、涂装工艺及潜在应用,说明光固化粉末涂料具有很高的经济优势和生态优势。     

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.     

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。     

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.     

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     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with