双官能团硅烷与双官能团单体反应综述

综述了近几十年来双官能团硅烷与双官能团单体反应的研究进展情况，期望对高聚物在工业应用方面的研究提供参考。     

醋酸丁酸纤维素对金属闪光漆的影响探讨

介绍了醋酸丁酸纤维素(CAB)和金属闪光漆的特性,以及CAB在金属闪光漆中所起的作用。展望了CAB的发展趋势。     

铂系与镍系苯加氢催化剂催化性能对比

在实验室中对比了苯加氢NCG系列镍催化剂和新型铂系苯加氢催化剂的性能,并在工业使用中进一步进行对比,最后给出工业应用的综合评价和提高环己烷质量的有效方法.     

新型DIAR成色剂的合成和应用研究

以黄成色剂为DIAR成色剂的母体,以取代的苯酚和取代的硫酚分别作为定时基团,取代的四氮 唑、噻二唑和苯骈三氮唑为抑制基团合成了5个新的DIAR成色剂,并通过红外、核磁、质谱和元素分析对它们 的结构进行了表征。在应用实验中,它们都有一定的效果。     

头孢雷特中间体2-氨甲基苯乙酸的氨基保护

头孢雷特是临床中常用的第二代头孢类抗生素,其临床应用前景十分看好。2-氨甲基苯乙酸是生产头孢雷特的重要中间体,由于该化合物中同时存在氨基和羧基两个活性集团,因此,在生产中需要先将氨基进行保护,以便羧基进行下一步反应。     

Insight into the effect of surface carboxyl and amino groups on the adsorption of titanium dioxide for acid red G

In this study, TiO₂ functionalized with organic groups were prepared to study the effect of carboxyl and amino groups on the adsorption behavior of TiO₂ for the removal of acid red G (ARG) as an anionic dye from aqueous solution. TiO₂ was successfully modified with carboxyl and amino groups by using the hydrolysis method with oxalic acid (OAD, with two carboxyl groups), ethylenediamine (EDA, with two amino groups) and DL-alanine (DLA, with one carboxyl group and one amino group) at low temperature (65 °C) and labeled as OAD-TiO₂, EDA-TiO₂ and DLA-TiO₂, respectively. The ARG uptake by the functionalized TiO₂ samples was largely dependent on the functional groups. The interaction between ARG and the functional organic groups on the TiO₂ samples plays an important role in the adsorption process, which leads to the excellent adsorption performance (higher capacity and faster adsorption rate) of the functionalized TiO₂ samples than that of P25 (commercial TiO₂ without modification). Furthermore, there is no obvious loss of the adsorption capacity for the functionalized TiO₂ even after 5 adsorption-desorption cycles, which indicated the good reusability of the modified TiO₂ samples for anionic dye removal from aqueous solution.     

亲水基团对水性聚氨酯性能的影响

对亲水基团在水性聚氨酯(WPU)中的作用及对性能的影响进行了概述.采用二羟甲基丁酸(DMBA)合成WPU的操作工艺性佳,有其潜在的应用前景.磺酸系WPU适用于较宽的pH范围,且具有优良贮存和耐水解等特性,磺酸系亲水化合物与羧酸基复配使用,亲水化合物总用量减少,产物WPU的性能更佳.     

自硫氟橡胶的处理和对一次硫化氟橡胶进行再生的方法介绍

氟橡胶在加工中出现焦烧自硫现象时要立即进行冷却，并在冷辊（１０℃以下）薄通轧炼１０次以上，可消除焦烧疙瘩，若出现严重的焦烧自硫现象，在冷辊薄通的同时，若加入０．５～１重量份的硬脂酸和０．５～１重量份的防焦剂ＣＴＰ可快速有效地消除焦烧自硫现象。采用冷辊薄通轧炼和加入１重量份的增粘剂古马隆，０．５～ｌ重量份硬脂酸及０．５～１重量份防焦剂ＣＴＰ，可快速有效地对一次硫化氟橡胶进行再生。     

阴离子表面活性剂的HLB值与端基和碳原子数的关系

通过应用Microsoft Office Excel 2003对部分阴离子表面活性剂的HLB值所进行的处理结果发现：阴离子表面活性剂的HLB值随亲油基碳原子数的变化规律很好地满足线性函数Y=ax b这一关系。同时也发现端基不同的表面活性剂亲水基的亲水性越强，其HLB值曲线的截距越大，而其亲油基上每增加一个-CH2-所引起HLB值的改变却相同。     

活性炭表面性质对染料废水生化出水深度净化效果的影响

不同种类活性炭对实际废水的吸附效果差异很大,由此对某大型染料生产厂的染料废水生化出水进行了活性炭吸附实验研究,对具有不同表面性质的活性炭的吸附效果进行了比较,探讨了染料废水生化出水吸附效果与活性炭表面官能团、吸附指标、比表面积之间的关系。结果表明,活性炭的吸附作用不仅与活性炭比表面积有关,还与孔结构有密切关系;染料废水生化出水中的溶解性有机物与活性炭表面碱基团可通过氢键、静电作用在活性炭表面吸附。     

Synthesis and properties of optically active substituted polyacetylenes having carboxyl and/or amino groups

Polyacetylenes having carboxyl and/or amino groups in the side chain were synthesized by the polymerization of N-(2-propynyloxycarbonyl)-l-alanine (1) and l-alanine N-propargylamide (2) catalyzed with a rhodium cation complex. Poly(1_0.5-co-2_0.5) exhibited a larger CD signal than the homopolymers. The polymer mixtures obtained by the polymerization of 1 in the presence of poly(2), and those obtained by the polymerization of 2 in the presence of poly(1) showed specific rotations larger than calculated. The polymerization of propargylamine in the presence of poly(1) did not exhibit significant effect, while the polymer mixtures obtained by the polymerization of propiolic acid in the presence of poly(2) exhibited [α]_D of positive sign, although poly(2) alone exhibited [α]_D of negative sign.     

Improvement of the Fluidizability of Cohesive Powders through Mixing with Small Proportions of Group A Particles

The gas fluidization behaviour of fine cohesive powders, classified as Geldart group C, is known to be characterized by cracks and channels leading to severe non‐homogeneities in the bed. Geldart group A particles, on the other hand, are known to show more homogeneous and regular fluidization behaviour. This paper studies the effects of the addition of small proportions of group A on the fluidization behaviour of a group C powder. Differential pressure fluctuations data at a sampling frequency of 200 Hz were recorded for two cases. In the first case, the bed contained only group C powder while in the second case small amounts of group A particles were added to the existing group C powder. Visual/image observations coupled with time series analysis showed that the addition of small proportions of group A particles substantially improved the fluidization behaviour of the bed even at low superficial gas velocities, leading to a more uniform fluidization. Evaluation of mean and standard deviations has shown the advantage of mixing the two powders as it allowed larger pressure fluctuations and smaller standard deviations. Power spectra, on the other hand, showed that unlike group C, for which fluctuations were small in magnitude and broadband in structure, the mixture showed stronger periodic behaviour as result of the attenuation of the small and rapid fluctuations caused by the flow of gas in the cracks and channels. Advanced methods such as the principal component analysis of the embedded trajectories allowed a quantitative comparison between the fluidization behaviour of the two systems.     

对抛体运动的几点研究

本文研究了平面内抛体运动的一些规律,用两种方法推导了抛体包络线的议程,并研究了抛体包络线的应用。     

预聚体NCO质量分数与PU乳液性能关系的研究

讨论了乳化前预聚体的NCO质量分数对聚氨酯乳液性能的影响。研究结果表明，对本阳离子型聚氨酯乳液体系而言，NCO质量分数在1％~2％范围内时，乳液的综合性能最佳。     

浅谈切断法中羰基化合物的极性转换

在有机合成的切断法逆合成分析中,经常碰到“不合逻辑”的极性颠倒的反常合成子,本文综述了切断法中羰基化合物常见的合成子的极性转换及其对应的等价物或者潜在的官能团提供试剂,这对于更加深刻地理解现有的有机反应以及设计新的合成路线都有指导意义.     

优化工艺参数,控制切片中的端羧基值

根据聚酯装置的生产实际,分析了在高负荷(≥150t/d)下切片中端羧基值上升的原因,通过对浆料工序和酯化工序工艺参数的调整达到了控制切片中端羧基含量的目的。     

基于UNIFAC基团贡献法的计算机辅助分子设计

本文论述了一种基于UNIFAC基团贡献法的计算机辅助分子设计方法。该方法采用UNIFAC模型中的基团概念,借助计算机技术来设计合成分子。主要涉及基团的分类和表征、基团的预选和可行分子结构的合成,同时本文编制了相应的分子设计程序。     

岳阳市献血者Rh血型系统表型的调查及Rh阴性献血者档案库的建立

目的调查岳阳市无偿献血人群Rh血型系统的表型,建立Rh阴性献血者档案库。方法使用Rh血型定型试剂,采用平板法进行初筛,结果可疑者用试管法确认。初筛阴性标本送血型参比室做确认试验,并进行Rh因子C、c、E、e和不规则抗体筛选。结果在183 596名无偿献血者中共筛出RhD阴性献血者404名(0.22%),弱D 5名(0.003%)。404名Rh阴性献血者中共检出A型112名(27.7%),B型112名(27.7%),O型128名(31.7%),AB型52名(12.9%)。表型共7种:ccdee 212名(52.5%),Ccdee 124名(30.7%),CCdee 30名(7.4%),ccdEe 18名(4.4%),ccdEE 8名(2.0%),CcdEe 8名(2.0%),CCdEe 4名(1.0%)。结论已建立了岳阳市Rh阴性献血者档案库。     

不同基团对丙烯酸酯胶粘剂胶粘性能影响的研究

介绍了通过共聚分别把－ＣＮ、－ＣＯＯＨ、－ＣＯＮＨ_２、－Ｃ_６Ｈ_５、－ＯＨ等基团引入丙烯酸酯大分 子链中,研究了这些基团分别对丙烯酸酯胶粘剂剥离强度和内聚强度的影响。试验结果表明：这些极性基团 的引入都使胶粘剂的剥离强度和内聚强度有不同程度的提高,其中－ＣＯＮＨ_２使之提高的幅度较大,－ＣＯＯＨ、 －ＯＨ次之,－Ｃ_６Ｈ_５、－ＣＮ使之提高的幅度较小。     

国有职教集团产权改革探析

职教集团多是以情感、信任、契约为维系纽带,单一产权结构制约了集团功能的发挥。实行多元化改革与重组,实现产权结构的二次分离,推动校企人力资源政策调整,加强政策与法制建设,可望促进职业教育集团健康发展。