膨胀型防火涂料的研究进展

介绍膨胀型防火涂料的基本组成、特点及其应用。概述防火涂料的机理和影响其性能的主要因素。介绍国内外膨胀型防火涂料的研究现状和今后的发展趋势。     

饰面型与钢结构防火涂料膨胀性能比较研究

采用膨胀倍数测试法测试了超薄型,薄型钢结构防火涂料与饰面型防火涂料的膨胀倍数,比较了饰面型防火涂料与钢结构防火涂料膨胀倍数的不同点。饰面型防火涂料膨胀倍数大于30倍为合格;超薄型防火涂料膨胀倍数大于35倍达到合格级,可以判断其质量合格。     

新型无卤可膨胀石墨防火涂料

以一种新型的物理膨胀型阻燃剂－可膨胀石墨为主,制取了一种无卤,环保,并具有优良防火性能的物理膨胀防火涂料,采用热重分析,小室燃烧法和模拟大板燃烧法等技术手段对化学膨胀型和物理膨胀型责两种防火涂料进行了比较分析,结果表明,与传统的化学膨胀型防火涂料相比,可膨胀石墨防火涂料在热降解,阻燃性,耐老化性,耐候性能等方面具有突出的优点。     

钢结构防火涂料

一、国内外钢结构防火涂料的研究情况 钢结构防火涂料可分为厚质涂料、薄型涂料和超薄型涂料.从20世纪60年代起,西方发达国家就致力于钢结构防火涂料的研究,并取得了积极的成果.德国研制出以多孔石墨、水玻璃等为主要成分的钢防火涂料;捷克以P-N-C体系为基础,加入氯乙烯聚合物开发出新型钢结构膨胀型防火涂料;芬兰研制出以磷酸盐、高炉渣等为主要成分的无机膨胀型钢结构防火涂料;日本开发出钢结构丙烯酸聚氨酯防火涂料.目前代表性产品主要有:英国Nullfire TS 605和P20,日本FR系列室内外钢结构防火涂料,美国50号、Monokote、Albiclad钢结构防火涂料,加拿大A/Dfire-film,德国Herberts38320、38091系列,法国FOH钢结构防火涂料等.20世纪90年代中期,以德国为首的国际市场上涌现出超薄膨胀型防火涂料,该涂料粒度细、涂层薄、施工方便、装饰性更好,在满足钢结构防火要求的同时,也能满足人们的高装饰性要求.近年来,国内对水基超薄型钢结构防火涂料研究非常活跃,并有相关产品面市.     

膨胀型防火涂料的研究进展和发展方向

本文综述了膨胀型防火涂料的发展历程、分类和国内外研究现状,展望了膨胀型防火涂料的发展方向和应用前景.     

水性膨胀型电缆防火涂料的应用

水性膨胀型电缆防火涂料是一种新型的电缆防火涂料，同国内目前主要使用的有机溶剂型电缆防火涂料相比，具有生产成本低，工艺简单，无污染，便于运输，贮存，施工等优点，且其防火性与实用性也优于前者。     

膨胀型防火涂料的特点及前景

本文首先介绍了防火涂料的分类,从防火机理、技术性能等几个方面阐述了膨胀型防火涂料的特点,然后结合实际情况,提出了一些防火涂料的发展方向和设想。     

无机膨胀型防火涂料的研制

讨论了发泡剂、成炭剂、脱水成炭催化剂、颜填料的选用，及各组分在防火涂料中的作用，进一步研究了以水玻璃为基料的无机膨胀型防火涂料的配方，其中掺入一些耐水增稠助剂，并对涂料的性能进行了检测．其耐水性和阻燃性良好，具有成本低廉、不污染环境等特点，可适用于木材防火．     

锑系防火涂料的研制

本文通过对锑系膨胀型防火涂料的研制,以制成一种单组分,防火性能好,施工方便的防火涂料,应用于建筑材料的防火.     

硼酸锌对超薄型钢结构防火涂料性能的影响

用膨胀型防火涂料现场检测炉和扫描电镜研究了硼酸锌对超薄型钢结构防火涂料的影响.结果表明,随着硼酸锌用量的增加,防火涂料的耐燃性能有先增强后减弱的趋势,适量添加硼酸锌能改善涂料炭层结构,有效增加防火涂料的耐火极限.     

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

正~~