加成型液体乙烯基硅橡胶的研制Ⅱ.白炭黑表面处理对硅橡胶性能的影响

以六甲基二硅氮烷为主要表面处理剂，考察了表面处理剂、处理助剂、水的用量等对白炭黑增强效果的影响。结果表明，处理100份白炭黑时，用25份六甲基二硅氮烷，5份二甲基二乙氧基硅烷，5份水，所得白炭黑对加成型液体硅橡胶增强效果较好。     

Nonisothermal crystallization kinetics of poly(butylene terephthalate)/montmorillonite nanocomposites

The melt intercalation method was employed to prepare poly(butylene terephthalate) (PBT)/montmorillonite (MMT) nanocomposites, and the microstructures were characterized with X‐ray diffraction and transmission electron microscopy. Then, the nonisothermal crystallization behavior of the nanocomposites was studied with differential scanning calorimetry (DSC). The DSC results showed that the exothermic peaks for the nanocomposites distinctly shifted to lower temperatures at various cooling rates in comparison with that for pure PBT, and with increasing MMT content, the peak crystallization temperature of the PBT/MMT hybrids declined gradually. The nonisothermal crystallization kinetics were analyzed by the Avrami, Jeziorny, Ozawa, and Mo methods on the basis of the DSC data. The results revealed that very small amounts of clay (1 wt %) could accelerate the crystallization process, whereas higher clay loadings reduced the rate of crystallization. In addition, the activation energy for the transport of the macromolecular segments to the growing surface was determined by the Kissinger method. The results clearly indicated that the hybrids with small amounts of clay presented lower activation energy than PBT, whereas those with higher clay loadings showed higher activation energy. The MMT content and the crystallization conditions as well as the nature of the matrix itself affected the crystallization behavior of the hybrids. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 99: 3257–3265, 2006     

加强协会服务功能 提升信息服务质量

为了进一步加强和扩展协会服务功能,提升信息服务质量,充分发挥<中国涂料>、<中国涂料>(信息版)的权威宣传报道作用,发挥专家委员会的服务咨询作用,推动中国涂料行业的健康发展,更好地为企业服务,"中国涂料工业协会‘两刊一网'编委、信息员暨专家委员会会议"于2005年9月21日在广州成功召开.中国涂料工业协会理事长王擢,副理事长江磐,副秘书长黄添源,涂料届知名专家虞兆年、朱传棨、洪啸吟等及涂料行业与相关行业的专家、编委、信息员60余人出席了会议.会议由专家委员会主任、<中国涂料>主编刘登良主持.     

直纺熔体输送管道的设计

介绍了熔体管道设计中管道壁厚选择、熔体流量、熔体管道流动压力降和熔体流速等计算方法和设计要点。     

Influence of polymerization conditions on the structure and properties of polyethylene/polypropylene in‐reactor alloy synthesized in the gas phase with a spherical Ziegler–Natta catalyst

A spherical TiCl₄/MgCl₂‐based catalyst was used in the synthesis of in‐reactor polyethylene/polypropylene alloys by polyethylene homopolymerization and subsequent homopolymerization of propylene in the gas phase. Different conditions in the ethylene homopolymerization stage, such as monomer pressure and polymerization temperature, were investigated, and their influences on the structure and properties of in‐reactor alloys were studied. Raising the polymerization temperature is the most effective way of speeding up polymerization and regulating the ethylene content of polyethylene (PE)/polypropylene (PP) alloys, but it will cause a greater increase in the PE‐b‐PP block copolymer fraction (named fraction D) than in the fraction of PP‐block‐PE in which the PP segments have low or medium isotacticity (named fraction A). Although changing ethylene monomer pressure could influence the ethylene content of PE/PP alloys slightly, it is an effective way of regulating the structural distribution. Reducing the monomer pressure will evidently increase fractions A and D. The mechanical properties of the alloys, including impact strength and flexural modulus, can be regulated in a broad range with changes in polymerization conditions. These properties are highly dependent on the amount, distribution, and chain structure of fractions A and D. The impact strength is affected by both fraction A and fraction D in a complicated way, whereas the flexural modulus is mainly determined by the amount of fraction A. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 2136–2143, 2006     

钛酸铝材料性能及合成工艺

着重介绍了钛酸铝（Al2TiO3）陶瓷的结构、性能和合成工艺，并对今后发展趋势提出了基本观点。     

A new route for the electrodeposition of platinum-nickel alloy nanoparticles on multi-walled carbon nanotubes

An electrochemical method was developed to deposit platinum (Pt) and nickel (Ni) nanoparticles on multi-walled carbon nanotubes (MWCNTs) through a three-step process. X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) show the alloy formation for Pt and Ni with a ratio of 1:1. The presence of Pt(0), Ni(0), Ni(OH)₂, NiOOH and slight NiO was deduced from XPS data. Electrocatalytic properties of the resulting PtNi/MWCNT electrode for methanol oxidation reaction were investigated. Compared with Pt/MWCNT, an appreciably improved resistance to CO poisoning was observed for the PtNi/MWCNT electrode, which was interpreted by a mechanism based on the bifunctional catalysis. The successful preparation of PtNi/MWCNT nanocomposites opens a new path for an efficient dispersion of the promising electrocatalysts in the direct methanol fuel cells.     

碳化钙气压法快速测定砌块含水率

开发新型工程现场快速检测砌块含水率方法,与传统的烘箱干燥方法进行比较,开展了工程现场试验,研究了在上海地区自然干燥环境条件下不同砌块墙面、朝向、砌块深度等对砌块含水率变化的影响。研究表明,该方法测试结果可信、操作方便,可用于现场快速检测。     

关于科学推进我国常规兵器靶场科研试验综合能力建设的思考

随着战争形态向信息化转变和以信息技术为核心的高技术武器装备的发展,常规兵器靶场建设面临着新的发展机遇和挑战。分析了我国常规兵器靶场建设发展面临的形势与任务;提出了以军事斗争装备准备需求为牵引,以装备试验向信息化转型为契机,充分发挥我国常规武器装备试验靶场的环境、条件、技术和人才优势,深入挖掘发展潜力,不断丰富完善功能,积极拓展服务保障职能,大力推进常规武器装备试验信息化靶场建设,进一步提升靶场科研试验综合能力的对策建议。