微波在PU/MOCA固化反应中的应用

武汉大学采用微波固化技术，以MOCA为交联剂，研究了苯酚封端的聚氨酯预聚物(PU)的固化过程，并将其与热固化方法进行了比较。结果发现：(1)苯酚封端的聚氨酯预聚物与MOCA在微波辐照下能很快进行，而且固化时问随微波功率增加而缩短；(2)微波固化反应过程中体系的升温速率在起始阶段随微波功率增加而增加，在后期阶段升温速率下降幅度也随功率增加而增加；(3)300W功率下的固化与120℃下的热固化相比，     

辐射固化有机硅隔离剂

综述了辐射固化有机硅隔离剂的类型、特点及其研究进展，分析了影响辐射固化有机硅隔离剂性能的因素，概述了辐射固化有机硅隔离剂的应用。     

用于热敏底材的紫外光固化粉末涂料

一种新型ＵＶ固化体系，能使配制的粉末涂料适用于木材和塑料之类热敏材料上，该体系避免了用液态ＵＶ固化体系常遇到的挥发物刺激性问题。环保适宜的粉末涂料技术和辐射固化技术二者相结合，所得体系在低温下快速交联，并且在固化期间几乎不产生挥发性物质。     

不饱和聚酯树脂新型室温固化体系

介绍不饱和聚酯树脂新型室温固化体系，以及不同引发剂，促进剂对体系凝胶，固化和透光率的影响。     

湿法缠绕用次中温固化的环氧树脂配方

采用自制改性液态芳香胺制得一种低粘度次中温固化环氧树脂体系，通过不同升温速率下的固化过程DSC扫描，研究了该体系的固化反应动力学，并据其优化了体系的固化制度。结果表明，该体系的表观固化反应活化能为38．54kJ／mol，反应级数为0．84。固化度和FT—IR测试表明，体系可在90℃次中温环境中达到固化完全。体系综合性能优良，可满足复合材料湿法缠绕成型对高性能树脂基体的要求。     

辐射固化技术的进展

本文介绍了辐射固化技术的类型、固化装置、固化物性能、市场以及在各种涂料中的用途和涂饰方法，展望了该技术的发展前景。     

辐射固化体系

光固化是一种快速发展的“绿色”新技术，从上世纪70年代至今，辐射固化技术在发达国家的应用越来越普及。和传统涂料固化技术相比，辐射固化具有节能无污染、高效、适用于热敏基材、性能优异、采用设备小等优点。本作郭西锋先生详细阐述了辐射固化机理，UV固化体系的重要组成部分，目前国内UV体系现状，并对UV体系的发展趋势作出预测。     

辐射固化涂料

金属闪光颜料组合物和含该组合物的UV固化金属闪光油墨组合物或UV固化金属闪光涂料组合物，用 UV 固化涂料涂装砑光膜的方法，高膜厚高平整性辐射固化涂层的形成方法，辐射固化组合物和带有优异耐划伤性和附着力的固化涂膜的物件，光固化树脂组合物及由其形成的附着力和柔韧性优异的涂膜。     

UV固化涂料的现状和光引发剂的开发

介绍了辐射固化技术的应用和发展，概述了光引发剂的作用机制，发展历史及在辐射固化涂料中的地位。     

环氧树脂基体固化研究

本文采用DSC方法对环氧树脂基体进行预固化度及固化度的研究，通过动力学参数计算树脂胶液室温存放的预固化度、固化度、，并考察不同固化制度对性能的影响。     

Experimental technology for manufacturing ceramic articles

The production of ceramic articles includes five principal operations, namely, preparation of the powder, pressing of the preform, its treatment, sintering, and grinding. If it is necessary to increase the adaptability to manufacture and improve the physicomechanical properties of the sintered material, the operations of hydrostatic treatment of the powder, preliminary sintering of the preforms, repeated mechanical treatment, etc. can be added. The technology is used for manufacturing the working part of cutting tools, dies, tools for shaping alloys of nonferrous metals, bearings, hinges, valves, ball locks, nozzles of hydromonitors, parts of pressing molds, lining parts, milling bodies, etc.Translated from Ogneupory i Tekhnicheskaya Keramika, No. 6, pp. 25 – 27, June, 1996.     

Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons in Surface Sediments from the Upper Reach of Huaihe River

Based on the available toxicity data and the concentrations of polycyclic aromatic hydrocarbons (PAHs) in 16 surface sediments from upper reach of Huaihe River, overlapping areas of probability density curves and margin of safety (MOS₁₀) were used to estimate the ecological risk of eight PAHs to aquatic organisms. The results indicated that the overlapping areas of Pyr, Nap, Fla, Ant, Phe, Ace, BaP, and Flu were 0.38, 0.29, 0.16, 0.11, 0.07, 0.03, 0.03, and 0.01, respectively. The risk of Pyr was the highest while that of Flu was the lowest. The overlapping area of ΣPAH₈ was 0.72, higher than that of any individual PAHs due to their joint effect. The calculated MOS₁₀ for Nap, Ace, Flu, Phe, Ant, Fla, Pyr, and BaP were 6.86, 5.42, 19.0, 2.72, 0.93, 0.75, 0.03, and 63.0, respectively. The probabilities of Nap, Ace, Flu, Phe, and BaP surpassing the 10th percentile value of the toxicity data were 0.07%, 0.30%, 0.05%, 1.97%, and 0.01%, respectively, suggesting minimal risk to aquatic organisms. However, the probabilities of Ant, Fla, and Pyr exceeding this value were 11.3%, 12.9%, and 64.8%, indicating potential risks. Among the individual PAHs, the ecological risk from Pyr was the highest, followed by Fla, Ant, Phe, Ace, Nap, Flu, and BaP. Additionally, the combined ecological risk of ΣPAH₈ in the upper reach of Huaihe River was significantly higher than that of any individual PAH alone, which the probabilities of ∑PAH₈ in excess of the 10th percentile of the toxicity data were 99.4%.     

基于蒙特卡罗方法的率值稳定性定量分析(Ⅱ)——原料化学成分波动对生料率值稳定性的影响

使用蒙特卡罗方法对原料化学成分波动与生料率值稳定性之间的定量关系进行了模拟计算。结果表明，一种原料单一波动，石灰石的SiO2、Al2O3、Fe2O3、CaO的标准偏差分别为0．10％、0．02％、0．05％、0．15％时，生料KH、SM、IM的标准偏差分别为0．006、0．028、0．031；砂岩的SiO2、Al2O3、Fe2O3、CaO的标准偏差分别为0．80％、0．20％、0．50％、0．10％时，生料KH、SM、IM的标准偏差分别为0．005、0．033、0．038。这一结果揭示，相对于石灰石，砂岩的预均化同样不容忽视。石灰石和砂岩化学成分同时按上述标准偏差波动，生料KH、SM、IM的标准偏差分别为0．008、0．043、0．049。     

Sampling soybeans for analysis

Conclusion Under the conditions of this study, 30-gram samplings of mixtures of soybeans were found to differ significantly in oil and nitrogen content indicating the desirability of larger samples. The use of 120 to 240-gram aliquots from mixtures of soybeans which vary widely in chemical composition should tend to reduce differences due to sampling to a reasonable minimum. Differences among 30-gram samplings of highly uniform soybean seed of a single variety seem to be of slight significance. The limitations of present sampling methods should be recognized in any comparison or interpretation of chemical analyses of soybean seed. The U. S. Regional Soybean Laboratory is a cooperative organization participated in by the Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, U. S. Department of Agriculture and the Agricultural Experiment Stations of Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Nebraska, North Carolina, North Dakota, Ohio, Oklahoma, South Carolina, South Dakota, Tennessee, Texas, Virginia, and Wisconsin. Assistant Chemists and Assistant Scientific Aide, respectively, U. S. Regional Soybean Laboratory, Urbana, Illinois.     

中国铬酸钠新技术的开发现状（Ⅰ）

根据已公布的专利、论文等,综述了中国铬酸钠新技术的开发现状,包括铬铁矿无钙焙烧法的工业化及发展与创新、铬铁矿湿法冶金、以碳素铬铁为原料生产铬酸钠、铬铁矿酸溶氧化法,并对各种方法的优点和缺点以及发展前景进行了讨论。介绍其中的无钙焙烧法的工业化及发展与创新,包括：无钙焙烧法的工业化;无钙焙烧法的完善与新创意（包括：反应器的改进和工艺流程的变化、中和法的改进、铝泥的利用、脱钒、两煅焙烧、预热后配碱、铬渣处理、飞灰回收利用）;少碱焙烧法、铬酸钠-碳素铬铁联产法;应用催化剂;氧气焙烧。     

Selected Quality Attributes of Dried Foods

Major quality parameters associated with dried food products are the color, visual appeal, shape of product, flavor, microbial load, retention of nutrients, porosity bulk density, texture, rehydration properties, water activity and chemical stability, preservatives, and freedom from pests, insects and other contaminants, as well as freedom from taints and off-odors. These parameters need to comply with the specifications of customers and regulations of different importing countries and often can adversely affect the acceptability of dried products. Therefore, quality of dried food products depends on many factors, such as raw materials, processing environment, packaging, microbial stability, use of additives, and temperature of storage. This review highlights selected quality attributes of dried food products and discusses ways of optimizing them.     

化工园区热电厂的规划和建设需注意的几个问题

从外部条件的支撑、自发电量的控制、热电平衡、建设主体、管理形式、热电厂的数量和规模、供热参数和供热方式、热电联产经济效益分析、热电厂的布置、热电联产的整体性、政策措施等方面进行分析,提出了化工园区热电厂的规划和建设中,值得关注和需要解决的问题。     

压塑工艺及模具设计——下篇 塑料压制成型 第八讲 概论

压塑与注塑采用不同类型的塑料,前者采用热固性塑料,后者采用热塑性塑料。压塑成型工艺及模具设计是一门不断发展的综合科学,不仅随着高分子材料合成技术的提高,压塑成型设备的更新,成型工艺的成熟而改进,而且随着计算机技术,快速造型技术,数值模拟技术,数字化应用技术,智能技术等在压塑成型加工领域渗透而发展。本讲座内容主要包括:压制成型工艺及分类,压制件设计,压制模结构设计及其零件设计,压制成型设备,压制塑件质量控制及缺陷分析,压制成型模应用举例;压注成型原理及工艺过程,压注成型模具结构设计,压注成型压力的计算,压注成型设备的选择,压注塑件质量及缺陷分析,压注成型模应用举例。     

压塑工艺及模具设计——下篇 塑料压制成型 第九讲 压注成型模具(二)

压塑与注塑采用不同类型的塑料,前者采用热固性塑料,后者采用热塑性塑料。压塑成型工艺及模具设计是一门不断发展的综合科学,不仅随着高分子材料合成技术的提高,压塑成型设备的更新,成型工艺的成熟而改进,而且随着计算机技术,快速造型技术,数值模拟技术,数字化应用技术,智能技术等在压塑成型加工领域渗透而发展。本讲座内容主要包括:压制成型工艺及分类,压制件设计,压制模结构设计及其零件设计,压制成型设备,压制塑件质量控制及缺陷分析,压制成型模应用举例;压注成型原理及工艺过程,压注成型模具结构设计,压注成型压力的计算,压注成型设备的选择,压注塑件质量及缺陷分析,压注成型模应用举例。     

介孔分子筛载体在油品深度加氢脱硫中的应用研究进展

介孔分子筛材料以其独特的孔道结构和孔径分布、高的比表面积及较好的热稳定性和水热稳定性等特点,近年来被广泛地用作油品深度加氢脱硫催化剂载体.本文系统综述了近年来MCM、HMS、SBA、KIT等系列介孔分子筛载体应用于油品深度加氢脱硫(HDS)的国内外研究现状.重点讨论了金属、氧化物、酸、磷、与其它载体复合等载体改性方式对...