PAN基活性炭纤维的制备及孔结构分析

采用水蒸汽活化法制备了具有不同比表面积的ＰＡＮ基活性炭纤维，并对其孔结构进行了较为详细的分析，结果表明，ＰＡＮ基活性炭纤维孔结构以直径小于１０Ａ的微孔为主，孔径分布窄，Ｄ－Ｒ，Ｄ－Ａ方程对其有良好的适用性。Ｈ－Ｋ法分析结果与Ｄ－Ｒ，Ｄ－Ａ方程结果相一致。     

聚氨酯松驰活化能的计算及其与微相分离结构的关系

本文以聚四氢呋喃（ＰＴＭＧ）、４，４－二苯基甲烷二异氰酸酯（ＭＤＩ）和１，４－丁二醇（ＢＤ）为原料，采用一步法合成聚氨酯样品，用ＤＤＶ－Ⅱ动态粘弹仪测定了样品的无能为力学图谱。首次建立一套利用动态力学图谱计算酯松弛活化能的方法，并用活化能大不定量地表征了聚氨酯的微相离结构。     

反应烧结透气性陶瓷—金属复合材料的相结合分析

通过注浆成型，空气中反应烧结等工艺过程，制备了一种透气性Ｍｕｌｌｉｔｅ－Ｆｅ２Ｏ３－Ｆｅ陶瓷－金属复合材料，运用ＸＲＤ，ＴＧ－ＤＴＡ等方法，考究了反应烧结过程中的相演变行为及冷至室温后试样心部到地表面的相组成变化，对实验结果进行了热力学脉动 分析。     

聚苯乙烯／聚乙烯共混体系的研究

讨论了不同第三组分和不同种聚乙烯对以聚苯乙烯为基质的ＰＳ／ＰＥ共混体系结构和性能的影响，发现苯乙烯－丁二烯－苯乙烯嵌段共聚物和苯乙烯－氢化丁二烯－苯乙烯嵌段共聚物作为第三组分对ＰＳ／ＰＥ共混体系均具有增容作用，用ＳＢＳ的效果比ＳＥＢＳ好，而ＳＢＳ的结构对增韧效果的影响不大。在ＳＢＳ存在下，ＬＬＤＰＥ对ＰＳ增韧效果最好，ＨＤＰＥ次之，ＬＤＰＥ最差。     

热塑性聚氨酯弹性体的合成与结构表征

研究了聚己二酸丁二醇酯型热塑性聚氨酯（ＰＴＡＤ－ＴＰＵ）和聚己二酸乙二醇丙二醇酯型热塑性聚氨酯（ＰＥＰＤ－ＴＰＵ）的合成，并用ＷＡＸＤ、ＤＳＣ、ＦＴ－ＩＲ对ＰＥＰＤ－ＴＰＵ进行结构表征。结果表明：不同软硬段配比对ＴＰＵ性能有显著的影响；异氰酸酯指数为１．０时，ＴＰＵ的综合性能最好；一步法合成的ＴＰＵ比二步法合成的ＴＰＵ的性能好；ＴＰＵ中硬段相形成结晶结构，且由于硬段的存在，提高了软段有序程度和热稳定性；软段相与硬段相之间有较好的相容性，微相分离程度小；ＴＰＵ中有７０％～７５％的氨基形成氢键。ＤＳＣ是表征ＴＰＵ序态结构的有效手段     

反应烧结透气性陶瓷-金属复合材料的相结构分析

通过注浆成型，空气中反应烧结等工艺过程，制备了一种透气性Ｍｕｌｉｔｅ－Ｆｅ２Ｏ３－Ｆｅ陶瓷－金属复合材料，运用ＸＲＤ（高温及常温），ＴＧ－ＤＴＡ等方法，考察了反应烧结过程中的相演变行为及冷至室温后试样心部至表面的相组成变化，对实验结果进行了热力学及动力学分析。     

素烧釉面砖的矿物结构分析

介绍了硅灰石－高岭石－滑石－绢云母－方解石－石英配料，在１０４０－１０８０℃、２０ｈ烧成条件下，坯体中所发生的矿物反应变人 助ＤＴＡ，Ｘ－ｒａｙ衍射分析，发现这类硅灰石配料，素烧阶段主要的固相反应是硅灰石与脱水高岭石反应形成钙长石，这一反应 较低温度下即可实现 。     

立构三嵌段聚丁二烯

考察了以１，１，４，４－四苯－１，４－二锂丁烷为引发剂，二哌啶乙烷为结构调节剂，环己烷为溶剂的丁二烯负离子聚合。研究了ＤＰＥ用量和聚合温度对聚丁二烯微观结构的影响。     

L—精氨酸席夫碱钴（Ⅱ）配合物的合成及结构研究

以２，４－二羟基苯甲酸Ｌ－精氨酸席夫碱为配体，合成了钴（Ⅱ）的合物。通过元素分析、ＴＧ－ＤＴＡ、ＩＲ有电子光谱研究了配合物的组成和结构。     

世界光盘生产及需求动向(Ⅲ)

（续上期）３．５ＤＶＤ系列１９９６年末，ＤＶＤ作为新的存储格式登台亮相。当初，以民用ＤＶＤ－Ｖｉｄｅｏ流行起来，以后便是ＰＣ用的ＤＶＤ－ＲＯＭ大出风头。由于ＤＶＤ介质容量大，非常适合高画质影像记录和大容量数据存储，所以最早的产品便是ＤＶＤ－Ｖｉｄｅｏ和ＤＶＤ－ＲＯＭ。ＤＶＤ－Ｖｉｄｅｏ首先在美国取得巨大成功，需求量暴涨。接着，在日本上也呈现出高速增长的势头。预计世界性的ＤＶＤ产业将在２０００年进入成长期。ＤＶＤ与其他存储格式相比，应用的历史还短。除ＤＶＤ－Ｖｉｄｅｏ和ＤＶＤ－ＲＯＭ外，属于ＤＶＤ…     

四氮杂杯[2]芳烃[2]三嗪的合成及其叠氮化研究

研究了四氮杂杯[2]芳烃[2]三嗪的合成及其叠氮化。以三聚氯氰和间苯二胺(摩尔比>2∶1)为原料,碳酸钾为缚酸剂,四氢呋喃为溶剂,在冰浴条件下合成中间体N,N’-二(4,6-二氯-1,3,5-均三嗪-2-基)-1,3-苯二胺,产率为85.8%;该中间体和间苯二胺(摩尔比为1∶1)丙酮为溶剂,在室温条件下反应,生成四氮杂杯[2]芳烃[2]三嗪,产率为45.5%;四氮杂杯[2]芳烃[2]三嗪和叠氮钠在40~50℃条件下反应生成四氮杂杯[2]-1,5-芳烃[2]-2-叠氮基-1,3,5-三嗪产率为90.0%。产物通过元素分析、红外光谱和氢谱的表征,其结构得到了确定。     

Two-component,one-pot synthesis of pyrimido[1,2-b] [1,2,4,5]tetrazines

Derivatives containing the cyclohepta4′,5′thieno[2′,3′:4,5]pyrimido[1,2-b][1,2,4,5]-tetrazin-6-one system were prepared from the reaction of 3-amino-2-thioxo-1,2,3,5,6,7,8,9-octahydro-4H-cyclohepta[4,5]thieno[2,3-d]pyrimidin-4-one (5) or its 2-methylthio derivative 6 with hydrazonoyl chlorides 9. The mechanism of the studied reactions has been discussed and the biological activity of the isolated products has been evaluated.     

Spray-dried hydroxyapatite-5-Fluorouracil granules as a chemotherapeutic delivery system

This study describes the preparation and characterization of hydroxyapatite-5-Fluorouracil (5FU) granules, which are intended to be used as chemotherapeutic delivery matrices and bone regeneration templates. Suspensions of hydroxyapatite (Hap) nanoparticles in 5FU solution are spray dried as micro sized granules having donut type shape. Several spray drying temperatures are studied 80 °C being the optimized condition for obtaining granules composed by Hap and 5FU without secondary phases. The produced granules at 80 °C reveal a fast releasing rate of 5FU when soaked in buffer phosphate solution maintained at physiological temperature (37 °C), thereby indicating the potential application of the produced Hap matrices for drug delivery systems (DDSs).     

The electronic and structural properties of nonclassical bicyclic thiophene: Monomer, oligomer and polymer

The nonclassical thiophenes have received a great deal of attention because of their unusual electronic structure in several decades. Based on DFT approach, the structural and electronic properties of thieno[3,4-c][1,2,5]thiadiazole, as well as of its co-oligomers and copolymers with benzene and thiophene, are investigated theoretically. The changes of nucleus-independent chemical shifts (NICSs) as a method examining conjugational degree are reported. The results show that the conjugational degree is increased with the increase of polymeric number. The density of state (DOS) and crystal orbital overlap population (COOP) are also investigated. The band structure analysis shows that the benzene and thiophene substitutes have quite low energy gap (0.23 and 0.32 eV, respectively). Therefore, those substitutes are implied as intrinsic conductors.     

Influence of pseudo-boehmite binder modified dealuminated mordenite on Friedel–Crafts alkylation

The influence of pseudo-boehmite binder on the catalytic properties of dealuminated mordenite (MOR) catalyst for Friedel–Crafts alkylation was investigated. Solid-state ²⁷Al MAS NMR spectroscopy, temperature-programmed desorption of ammonia (NH₃-TPD), BET surface area measurement and catalyst particle mechanical strength were used to characterize the catalysts. It was observed that the addition of pseudo-boehmite binder results in improvement in terms of pore size distribution and its mechanical strength. Furthermore, the dredged pore path of MOR was not destroyed although the acid amount and acid type were adjusted properly when the modified MOR was calcinated. Among these catalysts studied, the catalyst bound with 10 wt% pseudo-boehmite binder showed the best catalytic performance in terms of yield and stability, which can be attributed to its maximum medium strong acid amount and its structural properties which is favorable for fast diffusion of products.     

Hemicucurbit[n]urils and Their Derivatives – Synthesis and Applications

The first hemicucurbit[n]uril macrocycles were described in 2004, and since then a series of functionalised hemicucurbit[n]uril derivatives have been prepared and studied. The original hemicucurbit[n]urils suffer from sparse solubility, which limits their applications in supramolecular chemistry. Recent progress in the synthesis of a range of derivatives such as the biotin[n]urils, the bambus[n]urils, and the cyclohexylhemicucurbit[n]urils have enabled studies of the supramolecular chemistry of the hemicucurbituril system, both in water and in a range of organic solvents. In contrast to the popular cucurbit[n]uril macrocycles that are state-of-the-art hosts for cations, the hemicucbit[n]urils host anions. Herein we provide a survey of the literature covering the syntheses of the hemicucurbituril derivatives and their supramolecular chemistry.     

6-甲基-2-苯基咪唑[2,1-b]并-1,3,4-噻二唑-5-N'-取代苯基亚甲基碳酰肼的设计与合成

根据已有的具有抗肿瘤活性的咪唑[2,1-b]并-1,3,4-噻二唑类化合物的结构及其构效关系,以2-氨基-5-苯基-1,3,4-噻二唑和溴代乙酰乙酸乙酯为原料设计并合成了8个6-甲基-2-苯基咪唑[2,1-b]并-1,3,4-噻二唑-5-碳酰肼的腙类衍生物.通过1HNMR、LC-MS、IR等方法对其结构进行了确证.     

Synthesis of poly[2]catenane having rigid linkage by 1,3-dipolar cycloaddition of diazido[2]catenane with 4,4′-diethynylbiphenyl

A novel poly[2]catenane having rigid triazole rings between [2]catenane moieties was synthesized by the 1,3-dipolar cycloaddition of diazido[2]catenane with 4,4′-diethynylbiphenyl. The reaction proceeded effectively under mild conditions and gave a polymer in high yield. The number average molecular weight (M_n) of the polymers was 1.5 × 10⁴-2.5 × 10⁴. A cyclic dimer consisting of two [2]catenane moieties and two biphenylene units was formed along with the polymer. The cyclodimerization was suppressed by performing the reaction at a low temperature without lowering the yield or molecular weight of the polymer. The novel poly[2]catenane had higher solubility in some solvents than the corresponding non-catenated polymer having a similar primary structure.     

氧化铝基质对催化裂化催化剂重油分子裂化性能的影响

对工业拟薄水铝石做了深入表征,并详细研究了拟薄水铝石胶溶酸铝比、催化剂中拟薄水铝石含量以及铝溶胶含量对催化剂重油分子裂化性能的影响。研究显示,拟薄水铝石酸化酸铝比（体积质量比,mL/g）从0增至0.20,孔体积从0.39 cm³/g降至0.27 cm³/g,酸化后酸量先增加后减少,同时催化剂的孔体积下降,重油转化能力先增强后减弱;催化剂中拟薄水铝石质量分数从10%增至25%,催化剂重油转化能力逐渐增强,但随着拟薄水铝石含量的增加,重油产率下降趋势逐渐减小;铝溶胶含量增加将导致催化剂孔体积下降,催化剂重油转化能力下降。