反式聚苯乙炔的光电导

聚苯乙炔(PPA)是一种共轭高分子材料,具有较好的光电导性能。因反式PPA比顺式具有较高的光暗比,本文研究了反式PPA的光导和暗导特性,得到的光、暗导曲线基本平行,说明本征载流子和光生载流子的输运机制是相似的。在欧姆区的光导和暗导的活化能分别为0.24±0.03eV和0.58±0.03eV。     

酞菁类光电导材料研究进展

简要介绍了酞菁类化合物在光电导材料方面的应用及其研究现状;讨论了酞菁类化合物的光电导机理及其影响因素：在此基础上对有机光电导材料的发展趋势做了分析和展望。     

ClInPc－（TPD－PVK）光电导体性能的研究

本文以氯化酞菁铟（ＣｌＩｎＰｃ）为载流子发生层（ＣＧＬ），四苯基联苯胺（ＴＰＤ）与聚乙烯咔唑（ＰＶＫ）复合为载流子传输层（ＣＴＬ），形成双层结构的功能分离型有机光电导体（Ｐ／Ｒ），研究了它的静电感光性能．结果表明，ＣｌＩｎＰｃ／ＰＭＭＡ（３０％）与ＴＰＤ／ＰＶＫ（１∶１）两者匹配时的Ｐ／Ｒ具有良好的光电导性能，其电荷接受能力Ｖ＿（ｍａｘ）≈８００Ｖ，光电导率△Ｖ＿ｔ（１ｓ）＞７０％，暗衰小（＜５０Ｖ／ｓ），残余电位低（３０Ｖ／ｓ）．由真空蒸镀成膜（ＣＧＬ）所研制的Ｐ／Ｒ的光电导性能更为优异．     

光敏剂2,4,7-三硝基-9-芴酮的合成及表征

将9-芴酮与发烟硝酸反应合成了光敏剂2,4,7-三硝基-9-芴酮(TNF);并采用熔点、红外光谱及光导等手段对其进行了表征和分析。结果表明:成功的制备出了TNF;光电导测试表明TNF是良好的光敏剂,而且其光电导性随着温度的升高而升高,随光强的增加而增大。     

ClInPc—（TPD—PVK）光电导体性能的研究

本文以氯化酞菁铟（ＣｌＩｎＰｃ）为载流子发生层（ＣＧＬ），四苯基联苯胺（ＴＰＤ）与聚乙烯咔唑（ＰＶＫ）复合为载流子传输层（ＣＴＬ），形成双层结构的功能分离型有机光电导体（Ｐ／Ｒ），研究了它的静电感光性能。结果表明，ＣｌＩｎＰｃ／ＰＭＭＡ（３０％）与ＴＰＤ／ＰＶＫ（１：１）两者匹配时的Ｐ／Ｒ具有良好的光电导性能，其电荷接受能力Ｖｍａｘ≈８００Ｖ，光电导率△Ｖｔ（ｌｓ）＞７０％，暗衰小（＜５０Ｖ／ｓ）     

具有光电导性能的聚合物的合成

本研究首先合成了带氨基的酞菁锰,并使之成为重氮盐,通过重氮偶合法首次合成了含酞菁锰乙烯基咔唑单体,使之分别与丙烯腈、４－乙烯基吡啶发生共聚,合成出酞菁锰单体接枝率不同的共聚物Ｉ、Ⅱ,经ＩＲ、ＵＶ／ｖｉｓ、原子吸收法表征确证了聚合物和单体的结构,聚合物Ｉ、Ⅱ均具有良好的溶解性、成膜性。把聚合物Ｉ、Ⅱ及酞菁锰作为光生材料与ＴＰＤ、ＴＰＡ、吡唑啉匹配后制成功能分离型的双层光电导体。讨论了它们的光电导性,     

偶氮化合物的光电导性能的研究

本文合成了五种双偶氮颜料 ,它们是以芴酮为桥基 ,以含有五种不同取代基的色酚为偶合剂的化合物 .测定了这些化合物的吸收光谱和X射线衍射光谱 ;分别以这五种偶氮颜料为电荷产生材料制备了功能分离型双层光电导体 ,并对它们的光电导性能进行了研究 .     

机能分离型有机光电导体及其进展

介绍了机能分离型有机光电导体的感光版结构、光电导的基本原理及制作方法，并对流子产生材料和载流子传输材料及其发展趋势进行了讨论。     

稀土催化聚苯乙炔的顺反热异构化

根据文献报导的聚苯乙炔（PPA）顺反应构体的合成和结构表征^[1,2,3,4]，我们首采用Nd(naph)3-Al(i-Bu)3络合催化剂聚合苯乙炔（PA），得到顺－顺式含量大于90％的PPA，该顺式PPA室温下结构很稳定，温度高于140℃时发生顺反应热异构化反应，可以从红外光谱（IR）的分析和核磁共振氢谱（BNMR－H）的测定中进一步证实。     

NP-HPLC法快速分离维生素A乙酸酯和维生素A棕榈酸酯5种顺反式异构体

维生素A产品不同顺反式异构体生物效价差异较大,有必要建立一个能准确分离不同顺反式异构体的方法。以正相高效液相色谱（NP-HPLC）法在视黄醇的基础上建立了维生素A乙酸酯和维生素A棕榈酸酯的顺反式异构体分离及鉴定方法,能够准确分离常见的13-顺、11-顺、9-顺、9,13-顺及全反式异构体,为维生素A产品的检测和利用提供参考意见。     

Copolymers of N-vinylcarbazole with monomers containing carboxylic acid groups or carboxylic anhydride groups. II. Photoconductivity and composition

Copolymers of N-vinylcarbazole containing olefinic monomers that possess carboxylic acid or anhydride functionality have been produced. The photoconductive properties of the copolymers were measured. Fluorimetry has been used to relate this photoconductivity to the copolymer composition. Photoconductivity was greatest in copolymers containing high percentages of vinylcarbazole. It is suggested that this is due to block copolymer formation, since the development of such blocks allows greater interchromophore overlap than would be possible with alternating copolymers, which exhibit low photoconductivity.     

金属离子对溴碘化银乳剂微晶体的掺杂效应——Ⅰ.Fe~(3+)的掺杂

应用常规感光测定法、电镜法、介电损耗仪和微波光导仪研究了Fe~(3+)对卤化根乳剂微晶的掺杂效应,结果表明:Fe~(3+)使卤化银乳剂的感光度降低,灰雾降低,而反差变化不大。电镜观察和介电损耗测量表明:Fe~(3+)在物理成熟过程中对乳剂颗粒大小和离子电导率的影响不大,而微波光导数据表明,掺杂对电子电导的影响是明显的。上述结果表明:在AgBr中,Fe~(3+)起了深的电子陷阱作用,使光电子徙动路程缩短,影响潜影的形成效率。     

Curing reaction of unsaturated polyester resin modified by dicyclopentadiene

The objective of this research is to prepare modified unsaturated polyester resin(UPR) with good processibility, dimension stability and mechanical properties. In this study, dicyclopentadiene (DCPD) is selected as a modifier and the effect of DCPD content on the curing behavior of the modified UPR is examined via Differential Scanning Calorimetry (DSC) and Rheometrics Dynamic Analysis (RDA) experiments. The results of ¹H NMR identification for the chemical structure of modified UPR show that the trans-structure of UPR decreases as the DCPD content increases. The curing time necessary to reach peak maximum in DSC during the curing reaction lengthens as the stereo obstacles formed by the binary rings increase.     

反式聚异戊二烯聚合催化剂及合成胶的考评

介绍了反式聚异戊二烯(TPI)聚合催化剂及合成TPI产品的考评方法.对载体水含量、催化剂载钛量、催化效率、催化剂表观密度以及合成TPI产品的反式含量、结晶度、分子量及分布、物理力学性能、灰分等参数的测定做了详细研究.通过提出的考评方法对催化剂及合成胶产品进行质量控制,为优化生产工艺打下基础.     

金属离子对溴碘化银乳剂微晶体的掺杂效应——Ⅱ.Pb~(2+)的掺杂

应用常规感光测定法、电镜法、介电损耗仪和微波光导仪研究了Pb~(2+)对卤化银乳剂微晶的掺杂效应。结果表明:Pb~(2+)使乳剂的感光度降低,灰雾明显升高,而反差变化不大。由电子显微镜照片表明,Pb~(2+)对乳剂微晶大小和形状影响不大,但是离子电导和微波光导数据显示出,Pb~(2+)的掺杂使离子电导率降低0.15个对数单位,电子电导成倍降低。上述结果暗示:Pb~(2+)对照相性能的影响不是由于乳剂微晶大小和形状的变化,可能由以下两个原因引起:(1)Pb~(2+)起了深的电子陷阱作用,使光电子徙动路程缩短,影响潜影的形成效率,(2)Pb~(2+)(或PbBr_2)成为复合中心,加速光电子与空穴的复合,催化显影过程。     

Production of Conjugated Linoleic Acid by Microwave-Assisted and Ultrasound-Assisted Alkali Isomerization: Effects of Microwave Power and Ultrasound Amplitude

Conjugated linoleic acid (CLA) is commercially produced by alkali isomerization of linoleic acid (LNA). However, this method constitutes a relatively high content of undesirable CLA isomers. In present study, microwave-assisted and ultrasound-assisted alkali isomerization techniques were applied for production of CLA as an alternative to traditional alkali isomerization. This study was aimed to evaluate the isomerization degree of LNA, by using various process conditions such as microwave power, ultrasound amplitude, and their reaction times. The best conditions for LNA isomerization were a microwave power of 700 W and a reaction time of 6 h for microwave-assisted alkali isomerization and an ultrasound amplitude of 100% and a reaction time of 6 h for ultrasound-assisted alkali isomerization. Under determined conditions, microwave-assisted alkali isomerization (97.21%) resulted in a higher isomerization degree compared to ultrasound-assisted alkali isomerization (76.98%) while the content of undesirable CLA isomers in ultrasound-assisted alkali isomerization (0.62%) was lower than that of microwave-assisted alkali isomerization (1.87%). This study showed that application of the both techniques resulted in equal amounts of desirable CLA isomers. The content of desirable CLA isomers was 47.09% cis-9, trans-11 and 48.25% trans-10, cis-12 for microwave-assisted alkali isomerization and 36.34% cis-9, trans-11 and 40.02% trans-10, cis-12 for ultrasound-assisted alkali isomerization.     

Isomerization during hydrogenation. III. Linoleic acid

Summary The isomerization that takes place during the catalytic hydrogenation of linoleic acid and methyl linoleate producescis andtrans 9, 10, 11, and 12 monoenes. The double bond at the 12 position appears to hydrogenate slightly faster than that in the 9 position. More octadecenoic acids with double bonds at the 10 or 11 positions are produced during a selective (high temperature, low pressure) hydrogenation than during a non-selective process. Although the degree of selectivity of the hydrogenation is determined by the amount of isomerization of the original pentadiene system to a conjugated diene, only part of the methylene-interrupted diene goes through this type of isomerization even during a highly selective hydrogenation. The half hydrogenation-dehydrogenation reaction mechanism is applied to explain the simultaneous positional and geometrical isomerizations.     

液化气C4组分异构化研究及应用

在实际生产过程中,MTBE装置加工后的剩余C₄中含有大量非活性C₄烯烃,该部分烯烃随着液化气作为产品进行销售,对于液化气中的C₄造成浪费。提出将MTBE装置剩余C₄引入汽油加氢醚化装置异构化反应器进行异构化反应,将剩余C₄中的非活性烯烃转化为活性烯烃,再将异构化产物送至MTBE装置原料缓冲罐中作为MTBE装置原料进行反应。通过调研后得出,异构化反应器催化剂对剩余C₄中的非活性烯烃转化率可达30%,异构化反应产物与进料对比,异丁烯含量上升约3%,可有效提高MTBE装置产品产量。     

Influence of nitrogen doping on photoconductivity properties of a: DLC films

We present photoconductivity, photosensitivity and decay time of photocurrent measured as a function of temperature for both nitrogen-doped and undoped a:DLC films. The a:DLC films were deposited using radio-frequency (RF) glow discharge of methane gas (CH₄) as a source of carbon. Several films were doped employing nitrogen (N₂) as the doping gas. The doped and undoped a:DLC films have shown photoconductivity effects in a wide range of temperatures. All photoconductivity parameters, i.e. spectral response, photosensitivity, decay time and photocurrent, were measured for both undoped and doped films. The maximum spectral photosensitivity of doped films shifts to a higher energy, similar to the optical energy-gap measurements. The photocurrent of the doped film is larger by two orders of magnitude than that of undoped film, while the photosensitivity shows an opposite effect. The mobility of doped films (2.43 × 10⁻⁵) is larger by two orders of magnitude than that of undoped films (5.64×10⁻⁷) at room temperature. In order to provide nanoscale information about the morphological properties of the undoped a:DLC films surface, we have used atomic force microscopoy (AFM). It was found that the roughness of our films increased with increasing thickness of the films, from 0.3 to 1.5 μm.     

溴碘化银核壳乳剂中电子的捕获和复合

本文应用双注仪制备了在核表面进行不同程度还原增感和一系列溴碘化银核壳乳剂，在没条件下测定了核表面形成的不同还原增感中心对乳剂微晶光电子衰减动力学及发光光谱的影响。结果表明：在一定增感温度和时间条件下，当Ｎａ２ＳＯ３用量低于５．４ｍｇ／ｍｏｌＡｇ时光电子衰减动力学为二级反应，而当Ｎａ２ＳＯ３用量超过２７ｍｇ／ｍｏｌＡｇ时，增感中心一部分作为穴陷阱，另一部分作为电子陷阱，光电子衰减速率决定了电子的捕获