2－乙基－4－甲基咪唑固化环氧树脂的固化反应机理、动力学及其反应活性

本文应用ＤＳＣ和ＦＴＩＲ对２－乙基－４－甲基咪唑固化双酚Ａ二缩水甘油醚型环氧树脂体系的固化反应机理和２－乙基－４－甲基咪唑固化双酚Ａ二缩水甘油醚型、缩水甘油酯与脂环型环氧树脂体系的固化反应特征、动力学及其反应活性进行了研究．结果表明，双酚Ａ二缩水甘油醚型环氧树脂／咪唑体系的固化反应是分两步独立进行的，第一步是加成反应，第二步是催化聚合反应．缩水甘油酯与脂环型环氧树脂（ＴＤＥ－８５）／咪唑体系的固化反应过程也分两步进行，第一阶段反应主要是缩水甘油酯型环氧基进行的加成反应和催化聚合反应，第二阶段主要是脂环型环氧基进行的加成反应．各体系第一阶段的表现反应活化能均低于第二阶段活化能．当ＴＤＥ－８５型环氧树脂中引入缩水甘油醚型环氧树脂后，固化反应速率均较ＴＤＥ－８５环氧树脂单独固化时快．     

树脂富集－气相色谱法测定水中痕量苯系物

用国产ＧＤＸ树脂作吸附剂富集，气相色谱法测定了水中痕量苯系物，结果良好。     

聚合物超强酸催化剂及其应用

本文综述了各种有机聚合物超强酸体系的分类、合成、结构、以及它们在石油化工和有机合成中的催化作用。     

A novel method for detecting and counting overlapping tracks in SSNTD by image processing techniques

Overlapping object detection and counting is a challenge in image processing. A new method for detecting and counting overlapping circles is presented in this paper. This method is based on pattern recognition and feature extraction using “neighborhood values“ in an object image by implementation of image processing techniques. The junction points are detected by assignment of a value for each pixel in an image. As is shown, the neighborhood values for junction points are larger than the values for other points. This distinction of neighborhood values is the main feature which can be utilized to identify the junction points and to count the overlapping tracks. This method can be used for recognizing and counting charged particle tracks, blood cells and also cancer cells. The method is called “Track Counting based on Neighborhood Values” and is symbolized by “TCNV”.     

大孔网状树脂对三丁基氯化锡的吸附特性研究

从热力学，动力学及柱上吸附三方面讨论了Ｘ－５大网树脂对三丁基氯化锡的吸附特性。结果表明，吸附剂的吸附过程以物理吸附为主，外表面，内表面的吸附率分别为３８％，６２％装柱动态吸附率主要取决于柱长及流速，而溶液盐度及ｐＨ值影响不大。     

Effect of drying process on structure and property of polyaspartic acid resin

The effect of drying temperature on the physical and chemical structure and water absorbent behavior of polyaspartic acid resin were investigated via methods of infrared spectrum analysis and the electron microscope. The results show that: the heat treatment could result in a damage of the cross-linked bonds and a decrease of the cross-linked degree to the cross-linked polyaspartic acid resin. When the drying temperature exceeded 180°C, both backbone basic skeleton and side chain portions were also damaged heavily and gave off NH₃ in addition to the damage of the cross-linking portions. A relatively fast dehydrating rate at 40°C was in favor of the product with loose, uniform and nondestructive porous network structure to be obtained, which has big porosity and pore size. This kind of product has excellent water-absorbency and gel strength. The gel strength of PASP resin decreased with the increase of the drying temperature. The drying temperature has a greater effect on the swelling ratio and gel strength of the polyaspartic acid resin products with lower cross-linking degree than on that of the polyaspartic acid resin products with higher cross-linking degree.     

Metal dicarbides as intermediate species in thermal ion formation mechanisms

Lanthanide elements (lanthanum to lutetium) and actinide elements (uranium and plutonium) adsorbed onto resin beads and mounted on rhenium filaments were studied as thermal ionization sources. Temperatures at which these ion sources gave maximum intensities were measured for each of these elements. The temperature trends correlate with the dissociation energies of the corresponding metal dicarbide compounds. The metal dicarbide functions as a carrier to take the lanthanide and actinide elements to higher temperatures than would be attainable otherwise. This results in release of the atomic species at a higher temperature where ionization probability is significantly increased.     

2-噻吩乙酸在三种不同树脂上的吸附热力学和动力学研究

通过静态吸附实验,研究了XAD-4,NDA-100和ND-90吸附树脂对水溶液中2-噻吩乙酸的吸附热力学及动力学特性,结果表明,2-噻吩乙酸在XAD-4树脂上是单层吸附,符合Langmuir等温吸附方程,吸附过程符合准一级动力学吸附方程.2-噻吩乙酸在NDA-100和ND-90树脂上的吸附也能用Langmuir等温吸附方程表示,但并不只是单层吸附,而主要是由毛细管凝聚和微孔填充作用造成的吸附,吸附过程可分为大孔和中孔区的吸附以及微孔区的吸附两个阶段,两个阶段都符合准一级动力学吸附方程.     

用差热分析(DTA)法对环氧树脂固化条件的研究

用热分析方法研究了环氧树脂与乙二胺,二乙胺三胺,三乙醇胺,六次甲基四胺,邻苯二甲酸酐及顺丁烯二酸酐的固化条件。     

大孔阴离子交换树脂分离三烷基氧膦中有机酸

采用大孔阴离子换换树脂D296分离净化30%TRPO（三烷基氧膦）-煤油中酸性有机杂质,再用甲醇将TRPO-煤油淋洗干净而与脂肪酸分离。最后将脂肪酸等酸性杂质用四甲基氯化铵解吸。柱穿透容量为0.97mmol/g混合脂肪酸。