聚二甲基—二苯基硅氧烷与聚二甲基—甲基乙烯基硅氧烷？…

采用氢氧化锂作引发剂，Ｎ，Ｎ－二甲基甲酰胺作促进剂，八甲基环四硅氧烷，八苯基环四硅氧烷及四甲基－四乙烯基环四硅氧烷作单体，合成了聚二甲基－二苯基硅氧烷与聚二甲基－甲基乙烯基硅氧烷形成的ＡＢ嵌段共聚物，研究了氢氧化锂的用量及反应时间对反应的影响，并且用＾１ＨＮＭＲ，ＩＲ，ＵＶ谱及特性粘数对嵌段聚合物进行了表征。     

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。     

N—对甲基丙烯酰氧基—苄亚甲基—对溴苯亚胺液晶单体的合成…

以对羟基苯甲醛，甲基丙烯酰氯及对溴苯胺为原料合成侧链型Ｓｃｈｉｆｆ碱液晶单体Ｎ－对甲基丙酰氧基－苄亚甲基－对溴苯亚胺，并以偶氮二异丁腈为引发剂进行溶液聚合，改进单体合成法，使反应总产率达到４０％以上，探讨了引发剂浓度，单体浓度对聚合转化率及液晶聚合物相行的为的影响。     

二氮杂萘联苯型聚芳醚聚合机理的探讨

以自制的类双酚化合物与二卤单体反应，以及类双酚与对氯苯腈反应合成了３种模型化合物；通过对模型化合物的结构分析，证实了该新型类双酚单体中Ｎ－Ｈ参与亲核取代反应，形成了Ｃ－Ｎ相连而非Ｃ－Ｏ相连结构，进而提出了类双酚单体经亲核取代反应合成聚芳醚的反应机理。     

LDPE-VAC体系光接枝及交联反应的研究 (Ⅰ)引发剂的影响

采用不同的引发剂(如BP,Irgacure651,Irgacure184,XAN,ITX,AQ,BPO,AIBN,丙酮以及环己酮等)引发醋酸乙烯酯(VAC)在低密度聚乙烯(LDPE)膜上光接枝聚合反应,并用称重法测定了单体的转化率、接枝效率及膜的交联度;作为比较,同时考察了不加单体时上述引发剂引发LDPE膜的交联反应。结果表明,使用BP作引发剂时,接枝效率最高(接近80%),交联程度也最高(超过50%);而AQ,BPO和AIBN等却不能引发VAC的接枝聚合反应;单体不存在时,所有引发剂均能引发PE膜的交联反应,但交联程度不同。     

LDPE-VAC体系光接枝及交联反应的研究(Ⅰ)引发剂的影响

采用不同的引发剂(如BP, Irgacure 651, Irgacure 184, XAN, ITX, AQ, BPO, AIBN, 丙酮以及环己酮等)引发醋酸乙烯酯(VAC)在低密度聚乙烯(LDPE)膜上光接枝聚合反应, 并用称重法测定了单体的转化率、接枝效率及膜的交联度;作为比较, 同时考察了不加单体时上述引发剂引发LDPE膜的交联反应. 结果表明, 使用BP作引发剂时, 接枝效率最高(接近80%), 交联程度也最高(超过50%);而AQ, BPO和AIBN等却不能引发VAC的接枝聚合反应;单体不存在时, 所有引发剂均能引发PE膜的交联反应, 但交联程度不同.     

丙烯酸酯自交联高分子微球的研究

采用半连续种子乳液聚合方法合成了聚丙烯酸丁酯／聚（丙烯酯丁酯－甲基丙烯酸甲酯－交联单体）核／壳型胶乳，用ＴＥＭ、ＡＵＴＯＳＩＺＥＲ、ＤＳＣ、ＴＧ及ＩＲ等手段对胶粒进行表征，探讨３种不同交联单体及含量以胶粒结构形态、胶乳性能及胶膜性能的影响，结果表明：尽管交联单体不同，但胶粒都量核／壳结构；随交联单体含量减少，粒径逐渐减小；交联单体尽可能地分布在粒子表面；热处理过程中功能基团之间发生交联反应，使得胶     

光固化丙烯酸化异氰酸酯的合成及聚合反应动力学

以２，４－二异氰酸甲苯，丙烯酸β－羟丙酯、正戊醇，正壬醇为原料，合成了２种不饱和丙烯酸化异氰酸酯单体（ＡＡＴ，ＮＡＴ），并用自动记录膨胀计测定了２种单体在２－羟基－２－甲基－１－苯基－丙－１－酮（Ｄａｒｏｃｕｒ１１７３），α，α－二甲氧基苯乙酮（ＤＥＡＰ），α，α－二甲氧基－α－苯基苯乙酮（ＤＭＰＡ）为光引发剂时的聚合速率。结果表明，单体的活性ＮＡＴ＞ＡＡＴ，引发剂的引发活性为ＤＥＡＰ≥ＤＭＰＡ＞Ｄａｒｏｃｕｒ１１７３，单体的聚合速率受溶剂影响。     

N-对甲基丙烯酰氧基-苄亚甲基-对溴苯亚胺液晶单体的合成及聚合

以对羟基苯甲醛，甲基丙烯酰氯及对溴苯胺为原料合成侧链型Ｓｃｈｉｆ碱液晶单体Ｎ－对甲基丙烯酰氧基－苄亚甲基－对溴苯亚胺，并以偶氮二异丁腈为引发剂进行溶液聚合．改进单体合成法，使反应总产率达到４０％以上．探讨了引发剂浓度，单体浓度对聚合轻化率及液晶聚合物相行为的影响．用ＤＳＣ，热台偏光显微镜对聚合产物进行了考察．聚合物表现出５０～６０℃的热致液晶温度区间     

LDPE-丙烯酸酯体系光接枝及交联反应的研究

以二苯甲酮为光引发剂, 以低密度聚乙烯 (LDPE)膜为基膜,研究了不同单体的光接枝聚合反应及交联反应,并用称重法测定了聚合体系单体的转化率、接枝效率以及膜的交联度。结果表明,在所选用的单体中,甲基丙烯酸甲酯很难进行光接枝聚合反应 (接枝效率为0) ;丙烯酸的单体转化率最高 (>80 %) ;丙烯酸、丙烯酸丁酯、甲基丙烯酸和丙烯酸甲酯的接枝效率较高 (可达到95%)。测定了接枝后LDPE膜的交联程度 ,当丙烯腈、丙烯酸甲酯、丙烯酸及丙烯酰胺作为单体时 ,LDPE膜产生了较为明显的交联 (交联度>30 % )。观察反应结束后的LDPE复合膜,发现以丙烯酸丁酯、丙烯酸甲酯及丙烯酸作单体时较难分离。     

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     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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