聚酰胺改性氢化蓖麻油在无铅锡膏中的应用研究

通过试验，在免洗松香型无铅锡膏中添加聚酰胺改性氢化蓖麻油，考察其对焊锡膏流变性能及应用性能的影响。其中，测试方法包括粘度、粘着力和抗热塌性测试。聚酰胺改性氢化蓖麻油用量为5g时的焊锡膏的粘度适中、粘着力最大及其抗热塌性最好，会有一个较好的印刷性能。     

基于GPC法的改性沥青SBS含量测试方法研究

采用GPC对不同SBS剂量的改性沥青进行了测试,建立了SBS剂量与GPC测试数值的关系,并采用已知SBS剂量的样品对该方法进行验证。结果显示,GPC测得的SBS含量与SBS真实剂量线性关系良好,SBS剂量相对偏差均在5%以内,表明GPC法是一种检测改性沥青质量的快速、可靠的测试方法。     

Alternative Method for Determining O2 and CO2 Transmission Rates Through Microperforated Films for Modified Atmosphere Packs

Most experimental systems for measuring the permeability of microperforated polymeric films are static, mainly because in dynamic systems the small differences in pressure on both sides of the perforation may result in serious errors in the measurements. The O₂ and CO₂ transmission rate through microperforations of different sizes (from 40 × 30 to 350 × 110 µm) were determined in a static and in a dynamic system. In the latter case, rather than the diffusive flow, the hydrodynamic flow generated by the difference in pressure was measured (between 5 and 90 mbar). This was determined by applying Bernouilli's theorem and an experimental equation potentially relating the area of the microperforation with the transmission rate. A comparison of the transmission rates obtained in both cases gives coefficients of determination close to one (>0.993). This means that measuring the hydrodynamic flow can be considered as an alternative for the quantification of the diffusive flow through a microperforation. This is a simple and quick methodology that does not require expensive equipment. Furthermore, this feature enables commercial leak detection equipment to be used to quantify diffusive transmission rates through microperforations. Copyright © 2012 John Wiley & Sons, Ltd.     

有机硅氧烷改性VAE乳液的研究

在醋酸乙烯-乙烯共聚乳液（vAE乳液）聚合过程中添加有机硅氧烷单体制备改性VAE乳液。对比分析了不同种类、不同用量的有机硅氧烷对改性vAE乳液性能的影响。确定了有机硅氧烷单体在vAE乳液聚合过程中的最佳添加方式，筛选了聚合引发体系。研究表明，在反应过程中以H2O2--ZFS作为氧化-还原引发体系，选用长链的含水解阻碍官能团的硅氧烷，有机硅氧烷采用后添加的方式，能够合理而有效地控制反应节奏。制备出性能优异的改性VAE乳液。     

近年来世界工程塑料产业和技术动向

介绍近五年来世界五大通用工程的生产能力，需求变化，市场分布特点，以及开发应用，技术动向。     

水泥粉煤灰膨润土浆液在沙卵石帷幕灌浆中的应用

粉煤灰被掺入灌浆液中，在国外受到越来越多的好评，在国内亦逐渐被接受。本文介绍了水泥粉煤灰膨润土浆液的初步研究成果及明台电站一期围堰沙卵石帷幕灌浆中的应用情况。     

Redox-active silica nanoparticles : Part 2. Photochemical hydrosilylation on a hydride modified silica particle surface for the covalent immobilization of ferrocene

The surface of spherical nonporous monodisperse silica particles (diameter: 200 nm) is covalently modified with hydride by means of hydrosilanization. A direct silicon-carbon link between the hydride modified silica surface and 10-undecylenic acid is obtained by photochemical radical initiated hydrosilylation. A ferrocene unit is attached through an amide link to the carboxylic acid modified surface. Solid-state NMR and DRIFT spectroscopy indicate success of the reactions. The electrochemical oxidation and reduction of the ferrocene modified silica particles are observed after their adsorption on a platinum electrode. The cyclic voltammograms indicate, in addition to the charge transfer between ferrocene units on the particle surface, an interparticle charge transfer.     

双功能改性丙烯酸树脂皮革涂饰剂的研制

在丙烯酸丁酯—丙烯腈—丙烯酸甲酯体系中，引入１％～２％的丙烯酸，２％～３％的Ｎ－羟甲基丙烯酰胺，５％的烷基酚聚氧乙烯醚硫酸铵与十二烷基硫酸钠复配乳化剂，采取自生种子聚合技术可制得双功能团改性的丙烯酸树脂皮革涂饰剂。     

Recent developments in instrumental analysis for food quality

The definition of food quality has to be discussed in regard of changes of consumer expectations, legislative needs and new developments in instrumental analysis. The production process has to be controlled by fast new methods based on physical, chemical or increasingly biochemical/immunological principles. New chromatographic, immunological and mass-spectrometric methods allow the detection of trace amounts of residues/contaminants, allergens, trans-fatty acids and other undesired ingredients for food surveillance. Addition ally, analysis of new metabolic pathways in nutritional research is of increasing interest, giving evidence for positive health effects of minor food ingredients such as omega-3 fatty acids, isoflavones or conjugated linoleic acids. Most recent efforts in mass-spectrometric, biochemical and online/at-line methods for analysis of allergenicity, residues/contaminants, trans-fatty acid and for determination of identity and geographic origin of food are presented.     

我国利用高岭土、膨润土制备矿物纳米材料的研发现状与展望

文章介绍了多孔纳米粘土矿物、纳米高岭土、多孔状纳米煅烧高岭土、纳米级莫来石二氧化硅复合粉体、纳米级高纯莫来石、纳米蒙脱石、聚合物／纳米蒙脱石复合材料等矿物纳米材料方面的研发现状与进展、并分析非金属矿物高岭土、膨润土在纳米材料领域发展过程中的重要性、经济性与可操作性。指出了国家在相关政策上的鼓励与支持，是加速发展我国矿物纳米材料之重要前题。