外墙无机建筑涂料的不合格配方和原因分析

总结了外墙无机建筑涂料所有的典型不合格情况,利用红外光谱和热失重分析剖析了不合格的外墙无机建筑涂料的配方,从配方和成分解释了外墙无机建筑涂料的不合格项目产生的原因。     

弹性建筑涂料不合格配方的比较研究

利用红外光谱、热失重分析、动态热机械分析等方法,对多款不同厂家生产的不合格弹性建筑涂料进行了配方分析,讨论了不合格弹性建筑涂料的配方的缺点,建立了利用动态热机械分析方法快速鉴别不合格弹性建筑涂料的方法。     

橡胶增塑剂迁移行为及表征技术研究进展

对橡胶增塑剂迁移行为和影响因素,迁移数学模型及迁移物定性、定量表征技术进行了综述。指出通过利用多种表征技术,开发新的表征方法,对橡胶增塑剂迁移机理进行研究,并最终建立起更高效、准确、便捷的增塑剂迁移模型和分析方法将是该领域的研究方向。     

Physical dispersion state and fluorescent property of Eu-complex in the Eu-complex/silicon rubber composites

The fluorescent complex Eu(TTA)2(Phen)(MA) (HTTA=2-Thenoyltdfluoroacetone, Phen=l,10-phenanthroline, MA=Maleic an-hydrider) was synthesized and characterized with elemental analysis, infrared spectrum (IR), scanning electron microscope (SEM), X-ray Diffraction(XRD), differential scanning calorimetry(DSC), and fluorescent measurement. To explore the effect of different physical disper-sion state of Eu-complex on the fluorescent property of the Eu-complex/silicon rubber composites, various quantities of Eu(TTA)2(phen) (MA) were mixed with silicon rubber (SIR) and peroxide to form uncured composites. These composites were vulcanized to obtain cured Eu-complex/SiR composites at 250 ℃, which was higher than the melting-point of Eu-complex. The SEM, XRD, DSC, and the fluorescent measurement of these composites showed that both the complex molecules dispersed in the silicon rubber during the melting process and the parent Eu-complex particles had positive effects on fluorescent property, whereas the re-crystallized Eu-complex particles and the ggregating complexes formed during the melting-process had negative effects on fluorescent property. For the uncured composites, their fluorescent intensities almost did not change with the increasing amount of Eu-complex. Furthermore, for the composites with small content of Eu-complex, their fluorescent intensities decreased significantly after curing, and this difference in fluorescent intensity became smaller as the content of Eu-complex increases.     

用玻璃纤维做燃料元件

兰斯累尔聚合物工艺研究所正在试制一种新型的燃料元件。这种燃料元件的可裂变物质包含在通常的玻璃纤维内。     

高校体育与社区体育互动发展研究

中国社区体育是实施全民健身计划的主要基地和坚实基础,发展社区体育既是体育社会化的需要,也是社区建设、社区管理和社区服务的需要。我国普通高校体育教学中仍存在诸多问题,如体育课堂教学组织形式单一;体育成绩考核标准单一：高校体育教育周期短等。本研究是在高校体育教学改革和全民健身倡导背景下提出,以社区体育内涵即构成要素为参照,依托高校体育资源,分析二者出现的问题,同时寻求二者的共性和契合点。     

防辐射含钐有机玻璃的制备与性能

采用重结晶法制备了甲基丙烯酸钐盐[Sm(MAA)3],然后以偶氮二异丁腈为引发剂,将Sm(MAA)3与甲基丙烯酸甲酯通过本体聚合反应,制成具有防X射线和防紫外线辐射的透明有机玻璃。研究中,考察了在甲基丙烯酸甲酯本体聚合中加入Sm(MAA)3对有机玻璃的透光率、耐溶剂性、防辐射性能的影响。结果显示,新型的有机稀土盐玻璃不仅具有良好的X射线屏蔽性能,同时具有优异的透光率,并兼具较佳的紫外线吸收特性。     

Electrospinning preparation and luminescence properties of Eu(TTA)3phen/polystyrene composite nanofibers

Efficient luminescent composite nanofibers,composed of polystyrene(PS,Mw=250000) and europium complex Eu(TTA)3phen(TTA=2-thenoyltrifluoroacetone,phen=1,10-phenanthroline) with diameters ranging from 350 nm to 700 nm,were prepared by electrospinning and characterized by scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FT-IR),fluorescence spectroscopy,and thermogravimetric analysis(TG).The room-temperature fluorescence spectra of the composite nanofibers were composed of the typical Eu3+ ion red emission,assigned to the transitions between the first excited state(5D0) and the multiplet(7F0-4).Owing to the incorporation of the europium complex into the PS fiber matrix and the subsequent distortion of the symmetry around the lanthanide ions by the capping PS,the polarization of the Eu3+ ions was enhanced,which increased the probability for electronic dipole allowed transitions.The monochromaticity(5D0→7F2/5D0→7F1) around the Eu3+ ions was also efficiently improved.Judd-Ofelt intensity parameters(Ω2 and Ω4) were determined from the emission spectra based on the 5D0→7F2 and 5D0→7F4 electronic transitions,respectively.The results showed that the Ω2 values of the composite nanofibers were apparently higher than that of the pure complex,indicating an increased covalency degree in the europium first coordination shell due to the modification of PS matrix.The modification of the polymer matrix also resulted in much higher thermal stability of the composite fibers than that of the pure complex.     

移动计算环境下位置区的模糊化设计

在移动通信快速发展的今天,移动计算环境下的位置管理已经成为公认的最重要和最具挑战的问题之一。文章提出了一种新的位置区设计方案,对一个区域内大量移动用户的运动特点和通信情况分类进行位置区的模糊化设计,并通过模糊化建模和MATLAB仿真实现,分析了移动用户速度和会话到达率等因素对位置区设计的影响,给出了一种移动计算环境下位置区的模糊化设计方法,优化了网络的整体管理。     

内墙无机建筑涂料的检测与性能分析

检测内墙无机建筑涂料的物理性能、水蒸气透过率、有害物质含量等性能,利用红外光谱、有机物含量等分析手段解释各产品的性能差别,给出国内目前的内墙无机建筑涂料的有机物含量的范围。