碳黑/接枝聚乙烯导电复合材料的研究

利用Co^60-γ射线共辐照法在聚乙烯分子上接枝极性基因。以改性的聚乙烯为基体，碳黑为导电颗粒，制备碳黑／接枝聚乙烯导电复合材料。用多用电表对导电复合材料电性能进行了测试。结果表明：接枝改性后的聚乙烯作为导电复合材料的树脂基体，可改善导电复合材料的电阻稳定性，提高导电复合材料的升阻比。     

Reinforcement Mechanism of Carbon Black (CB) in Natural Rubber Vulcanizates: Relationship Between CB Aggregate and Network Structure and Viscoelastic Properties

Carbon black (CB) aggregates in CB-filled natural rubber (NR) vulcanizate were joined together and formed CB aggregates in the CB region less than 20?phr. It was found that the viscoelastic behavior was related to the hydrodynamic interaction between CB aggregate and NR matrix. In the CB loading region more than 40?phr, CB aggregates formed CB network structure in it. Using the parallel mechanical model of the two phases of a rubber matrix and an immobilized CB/NR interfacial layer excluding a CB phase, it was possible to quantitatively explain the relationship between the viscoelastic behavior of CB network structure.     

CB20结构模块组安装施工技术分析

CB20模块是AP1000核电站非能动安全壳冷却系统(PCS)的钢结构水箱模块,它是一个多部件组合体,外形尺寸大,结构复杂,且要在现场露天组成一个整体,其中涉及组装、焊接、运输及吊装等环节,施工难度大。本文介绍了CB20模块的组装、运输、吊装和安装等施工工艺流程,分析了CB20模块施工的重点及难点,结合现场实际情况,提出一些应对措施,尤其是对其变形的控制方面。这为后续CB20模块组安装施工及其他大型模块施工起到一定的参考和借鉴作用。     

从高层民用建筑工程设计谈ATSE的选用

ATSE装置是应急电源配电系统的一个组成部分,应根据该系统的具体设置、有关要求等来确定其级别的选用。PC级、CB级ATSE各具优缺点,设计者应采取各种措施令其扬长避短。在配电系统中,应因地制宜设计选用。两者孰优孰劣,似一锤难以定音。     

自动转换开关电器(ATSE)在设计中的合理选择与应用

本文通过对自动转换开关电器的工作原理及产品标准对比和分析,指出选择ATSE产品应注意的问题,工程电气设计中选用的ATSE应具有不低于AC-33B使用类别及一定的短路性能,才能保证用户安全使用。     

再析自动转换开关电器ATSE可靠性

本文剖析了CB级ATSE和PC级ATSE的内部结构和工作原理，分析了ATSE的可靠性，并用ATSE返修率验证其可靠性。从中得出PC级ATSE的可靠性高于CB级ATSE，双电动操作机构的CB级ATSE可靠性高于单电动操作机构的CB级ATSE。     

PolyHIPEs: Recent advances in emulsion-templated porous polymers

Porous polymers with well-defined porosities and high specific surface areas in the form of monoliths, films, and beads are being used in a wide range of applications (reaction supports, separation membranes, tissue engineering scaffolds, controlled release matrices, responsive and smart materials) and are being used as templates for porous ceramics and porous carbons. The surge in the research and development of porous polymer systems is a rather recent phenomenon. PolyHIPEs are porous emulsion-templated polymers synthesized within high internal phase emulsions (HIPEs). HIPEs are highly viscous, paste-like emulsions in which the major, “internal” phase, usually defined as constituting more than 74% of the volume, is dispersed within the continuous, minor, “external” phase. This review focuses upon the recent advances in polyHIPEs involving innovations in polymer chemistry, macromolecular structure, multiphase architecture, surface functionalization, and nanoparticle stabilization. The effects of these innovations upon the natures of the resulting polyHIPE-based materials (including bicontinuous polymers, nanocomposites, hybrids, porous ceramics, and porous carbons) and upon the applications involving polyHIPEs are discussed. The advances in polyHIPEs described in this review are now being used to generate new families of porous materials with novel porous architectures and unique properties.     

直流接地引起涌流抑制器误动原因分析及改进

结合某换流站的500 kV站用电变压器进线开关3次误动作实例,介绍了事故的概况,叙述了事故原因的查找过程:检查回路、测试绝缘、更换操作箱插件等方法均未发现异常;通过数字示波器成功地监测到第3次开关跳闸时,各跳闸回路的电压、电流波形,分析波形和涌流抑制器的动作特性后,确定3次事故是由于220 V直流系统接地引起的变压器涌流抑制器开入回路误动作而导致开关误跳闸.针对查找出的原因,从提高装置的抗干扰和改进外部设计回路2个方面采取了相应措施,其效果良好.     

镍锌铁氧体/炭黑填充环氧树脂基吸波性能研究

以环氧树脂为基制备了Ni—Zn铁氧体／炭黑双层结构复合材料吸波平板,由具有良好阻抗匹配的表面层、高吸收层组成（总厚度控制在6mm之内）。采用矢量网络分析仪对其在4～18GHz频段内的吸波性能进行了测试。结果显示,随炭黑质量分数的增加,吸收层的吸波陛能呈上升趋势,在炭黑质量分数达到35％时,在4．2GHz处出现吸收的峰值,此时,优于-6．00dB的有效频宽为5．8GHz。     

炭黑、白炭黑加入顺序对NR/SSBR胶料性能的影响

通过改变炭黑、白炭黑的加料顺序,探讨了炭黑/白炭黑在不同并用比下（75/25,50/50）在天然橡胶（NR）与溶聚丁苯橡胶（SSBR）共混体系中的最佳加入顺序。结果表明,炭黑、白炭黑的加入顺序并不是绝对的,炭黑/白炭黑并用比为75/25时（填料总量为45份）,先加白炭黑有利于白炭黑的分散,硫化胶物理机械性能较好,压缩生热较低,动态力学性能较好;当炭黑/白炭黑并用比为50/50时,炭黑/白炭黑一起加入得到的硫化橡胶性能较好。