纳米塑料

纳米塑料是定指用层状硅酸盐作为分散相,利用插层聚合、熔融插层等特殊工艺制备的聚合物/层状硅酸盐纳米复合材料。层状硅酸盐主要来源于天然蒙脱土,故又称聚合物/粘土纳米复合材料[见于学术刊物,包括美国”科学”(Scjence)杂志和英国”自然”(Nature)杂志]。纳米塑料一词主要出现于工业性和商业性杂志中。蒙脱土的基本单元结构片层     

聚合物／层状无机物纳米复合材料研究进展

从聚合物／层状无机物纳米复合材料的类型和制备方法、结构与性能表征等方面,总结了聚合物／层状无机物纳米复合材料的研究进展。利用插层复合原理制备各种聚合物／层状无机物纳米复合材料,赋予材料独特的结构,更优异的力学,热学,电磁和光学及其气体阻隔性能,具有重要的科学意义和应用前景。     

聚合物/层状无机物纳米复合材料研究进展

从聚合物/层状无机物纳米复合材料的类型和制备方法、结构与性能表征等方面,总结了聚合物/层状无机物纳米复合材料的研究进展.利用插层复合原理制备各种聚合物/层状无机物纳米复合材料,赋予材料独特的结构,更优异的力学,热学,电、磁和光学及其气体阻隔性能,具有重要的科学意义和应用前景.     

聚合物/层状硅酸盐纳米复合材料制备方法及性能的研究进展

聚合物 /层状硅酸盐纳米复合材料因其优异的性能是目前材料科学研究的热点。本文介绍了层状硅酸盐的结构、聚合物 /层状硅酸盐纳米复合材料的类型及微观结构 ,重点介绍了聚合物 /层状硅酸盐纳米复合材料制备方法及性能的研究进展 ,指出需根据不同的聚合物 ,寻求经济可行的制备方法     

聚合物/层状无机物插层型纳米复合材料

本文概述了适于制备聚合物/层状无机物插层型纳米复合材料的主客体材料类型及聚合物插入到无机物层间的影响因素。简介了该复合材料的制备方法、结构和性能特征及潜在的应用前景。     

LDPE/CA-MMT纳米复合材料结晶动力学研究

聚合物/层状硅酸盐纳米复合材料是功能化无机/有机纳米复合材料的典型代表.层状硅酸盐填料的加入会导致聚合物结晶性能的明显变化,进而对聚合物复合材料的使用性能产生显著影响.因此,对聚合物/层状硅酸盐纳米复合材料结晶性能和结晶动力学的研究具有极大的实际应用价值.本文以哈克转矩流变仪制备了具有长效抗菌功能的低密聚乙烯/醋酸洗必...     

我国聚合物—层状硅酸盐纳米复合材料研究取得重要进展

在国家自然科学基金支持下 ,中国科学院化学研究所漆宗能研究员及其研究组成功发明了聚合物纳米复合材料的制备新方法 ,在多种高分子纳米复合材料的研究中取得理论研究和工业化开发突破性进展 ,为我国大幅度提高大品种塑料性能和工业技术水平 ,改善高分子材料的品种结构提供了新技术 ,对我国在该领域形成和发展自己的理论、拥有自主知识产权具有重要意义。漆宗能等采用插层复合法实现了高分子与层状硅酸盐片层在纳米尺度上的复合。复合过程中 ,如何将单体或聚合物插进蒙脱土层状硅酸盐片层之间 ,以形成厚度为１纳米 ,长、宽约为１００纳米的…     

我国聚合物—层状硅酸盐纳米复合材料研究取得重要进展

 在国家自然科学基金支持下 ,中国科学院化学研究所漆宗能研究员及其研究组成功发明了聚合物纳米复合材料的制备新方法 ,在多种高分子纳米复合材料的研究中取得理论研究和工业化开发突破性进展 ,为我国大幅度提高大品种塑料性能和工业技术水平 ,改善高分子材料的品种结构提供了新技术 ,对我国在该领域形成和发展自己的理论、拥有自主知识产权具有重要意义。漆宗能等采用插层复合法实现了高分子与层状硅酸盐片层在纳米尺度上的复合。复合过程中 ,如何将单体或聚合物插进蒙脱土层状硅酸盐片层之间 ,以形成厚度为１纳米 ,长、宽约为１００纳米的片层并均匀分散在聚合物中是关键的一步。     

纳米层状硅酸盐在轮胎气密层中的应用研究

聚合物纳米复合材料因其分散相的高度精细化和纳米尺寸效应而具有与传统复合材料明显不同的力学性能和功能性能。其中,层状硅酸盐聚合物纳米复合材料又以分散相的高形状系数比而具有更为突出或特异的性能,如高刚性、高强度、高阻隔、高阻燃性等。因此聚合物纳米复合材料自问世以来便受到各国学者和工业界广泛关注。在轮胎气密层橡胶中,可以充分利用纳米层状硅酸盐材料的高阻隔性,从而起到提高气密性的作用。更进一步的应用研究表明,可以通过使用纳米层状硅酸盐填充橡胶作为气密层,在不损失气密性的情况下,减少气密层厚度,从而降低轮胎重量,实现原价节俭和滚动阻力降低的双重效果。     

聚合物/蒙脱石纳米复合材料的研究现状与发展前景

对近十年来聚合物／蒙脱石纳米复合材料研究进展和现状进行总结，对几种主要的聚合物基纳米复合材料从制备机理、制备方法，对材料的性能改善以及应用开发前景进行了归纳。针对聚合物／蒙脱石纳米复合材料的插层复合、原位聚合等制备方法进行了详细论述。     

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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