β—环糊精改性淀粉类高吸水树脂的制备及其性能研究

将β－环糊精分子用环氧氯丙烷预交联后，与淀粉、丙烯腈混合、，用硝酸铈铵作引发剂接枝共聚，经水解可得拥有疏水空腔的β－环糊精改性高吸水树脂。该吸水树脂除具有良好的吸水和保水性能外，还对药物、香料等疏水性有机分子具有良好的包合或吸附作用。     

一种羟基改性的氯乙烯-醋酸乙烯共聚树脂的均相合成

采用均相法对氯乙烯-醋酸乙烯酯二元共聚树脂进行了羟基改性研究。文中考察了反应温度θ、反应时间t、碱与二元氯-醋共聚树脂的质量比、溶剂甲醇与二元氯-醋共聚树脂的质量比、加料方式等因素对三元共聚物中羟基含量的影响。在t=5h，θ=40℃，ω(NaOH)：ω(氯-醋二元共聚树脂)：0．012：1，ω(甲醇)：ω(氯-醋二元共聚树脂)=1：3.5，R=300r／min的条件下，可得到与进口产品——美国UCC公司VAGH树脂组成接近的共聚物。     

淀粉-丙烯酸接枝共聚物的生物降解研究

采用真菌生长法和土壤掩埋法对淀粉－丙烯酸接枝共聚高吸水树脂的生物降解性能进行了研究，运用表现观察法、重量测定法对试样的降解过程进行了测试，并对原有的测试方法作了改进，试验结果表明，淀粉－丙烯酸接枝共聚物具有较好的生物降解性能。     

交联淀粉—碘甲基化聚丙烯酰胺的合成与吸水性

在铈盐引发下用淀粉与丙烯酰胺共聚并进行部分交联得接枝共聚物（ＣＳ－ｇ－ＰＡＭ）继之与多聚甲醛和偏重亚硫酸钠反应制备交联淀粉－在化聚丙烯酰胺（ＣＳ－ｇ－ＳＰＡＭ），该树脂具有高吸水性，其吸水性受反应条件、单体配比、交联度、磺化程度等因素的影响。     

苯酚甲醛-M废渣共聚树脂的合成

以M废渣、苯酚、甲醛为原料，共聚合成了热塑性树脂，研究了反应条件、共聚组分对共聚物结构和性能的影响．通过试验确定，苯酚与M废渣的质量比为80g／20g，甲醛用量40mL，磺化用浓硫酸、废树脂比例为100mL／110g时制得的共聚树脂在试验范围内具有较好的综合性能。     

甲基丙烯酸十二酯与甲基丙烯酸辛酯共聚高吸油性树…

本利用悬浮聚合法，以甲基丙烯酸十二酯和甲基丙烯酸辛酯为单体，合成了共聚型高吸油性树脂，还研究了共聚单体的配比，交联剂用量、引发剂用量、分散剂用量、油／水比诸因素对高吸油性树脂的性能影响，制得的树脂可以吸其自身重量１０．９的煤油，９倍的苯。     

淀粉-丙烯酸-丙烯酰胺共聚物合成新工艺

研究了淀粉－丙烯酸－丙烯酰胺接枝共聚制备高吸水性树脂的新工艺．“中试”及产品性能测试结果表明,盘式聚合工艺简便、易操作,对设备结构无特殊要求,成本低,所得到的产品具有较高的吸水率和吸水速率     

淀粉接枝共聚高级水性树脂的合成及其性质研究

以玉米淀粉和丙烯基单体为主要原料，对淀粉接枝共聚高吸水性树脂进行中性一步法合成，优化合成反应路径。根据自由基聚合反应机理，在引发剂及交联剂作用下淀粉与丙烯基单体进行接枝共聚反应，定性及定量地分析反应物溶液pH值、反应温度、引发剂用量以及单体与淀粉的配比等因素对高吸水性树脂吸水性能的影响，从而找出最佳反应条件。同时采用量子化学ab initio UHF方法在6－31G基组水平上对两类淀粉链段自由基模型进行几何优化，分析体系的净电荷、前线分子轨道分布规律，以及自由基的稳定性和反应性特征，揭示接枝共聚反应机理。     

亲水涂料用丙烯酸/丙烯酰胺树脂的制备

丙烯酸（AA）／丙烯酰胺（AM）树脂是一种较常见的亲水涂料成膜剂。采用水溶液共聚法，研究反应时间、反应温度对AA－AM共聚反应转化率的影响，以及单体酸比、中和度对产物亲水性的影响。同时，研究因第三单体的引入而影响产物的亲水性和耐水性。     

乳液法合成AAS树脂

本文扼要介绍了以聚丙烯酸丁酯为主体的橡胶相，在橡胶乳粒上用苯乙烯和丙烯腈进行接枝共聚后，再与苯乙烯、丙烯腈共聚树脂的乳液共混而制得ＡＡＳ树脂的生产方法。同时对橡胶相的交联度、接枝率、粒径以及树脂相的分子量等因素与ＡＡＳ树脂性能的关系进行了研究；并提出了在生产上控制这些因素的方法。中试制得的ＡＡＳ树脂经有关单位使用鉴定，认为可供推广使用。     

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。     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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