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1.
合成了含硫堇的光致变色聚合物 ,测定了反应温度、反应时间、pH值以及硫堇含量对光致变色氧化还原反应的影响  相似文献   

2.
徐玫 《湖北化工》2002,19(1):21-22
合成了含硫堇的光致变色聚合物,测定了反应温度、反应时间、PH值以及硫堇含量对光致变色氧化还原反应的影响。  相似文献   

3.
光致变色材料是目前光功能材料领域中研究的热点之一.在众多的光致变色体系中,二芳烯化合物因其良好的热稳定性和抗疲劳性使其在信息光存储及分子光开关等领域有着广泛的应用前景.发展新型二芳烯光致变色分子体系和相关的合成路线以及探索新型二芳烯分子结构与光致变色性质的关系是一个很有吸引力的课题.该论文以发展新型二芳烯光致变色化合物为目标,对分子的设计合成及光致变色性质进行了深入的研究,并对二芳烯化合物在光信息存储和化学传感器方面的应用进行了探索.取得了一些有意义的研究成果:  相似文献   

4.
树枝状聚合物由于其独特的结构特性引起了人们极大的兴趣.其高度的结构对称性、外围可带有大量官能团等结构特点,使这类化合物在高分子、催化、光化学、材料科学及光子器件等方面显示出广泛的应用前景.已有的研究表明,这类化合物的性质不仅决定于其化学结构,还强烈依赖于其构象,研究此类化合物的构象对推动相关各研究领域的发展有着重要的意义,  相似文献   

5.
树枝形聚合物的结构特点和良好的可修饰性使其在模拟光捕获体系研究中受到广泛重视,本论文设计合成了两个系列的双枝芳醚树枝形聚合物,通过光物理以及光化学方法研究了芳醚树枝形聚合物体系三重态能量传递和三重态电子转移过程。  相似文献   

6.
综述了通用单体、合成方法及溶剂、乳化剂等在合成聚合物型含氟整理剂时存在的缺陷,介绍了用于克服这些缺陷和满足特殊需要的一些新型含氟单体、改性单体、溶剂和乳化剂,采用多步聚合得到的嵌段、接枝聚合物型含氟整理剂与无规聚合物型含氟整理剂相比有独特的优势,聚合物型含氟整理剂与有机硅整理剂、异氰酸酯等其他助剂复合是提高其性能的另外一种有效方式,指明含氟整理剂的发展沿着提高性能、降低成本和符合环保要求三个方面前进。  相似文献   

7.
王元荪 《橡胶工业》2007,54(8):482-482
由日本住友化学株式会社申请的专利(专利号CN1667006,公开日期2005—09—14)“制备改性二烯烃聚合物橡胶的方法”,是在碱金属催化剂存在下使在烃溶剂中的共轭二烯烃单体或其混合物与芳族乙烯基单体聚合,生成携带碱金属端基的活性聚合物,该活性聚合物再与硅烷化合物反应生成改性二烯烃聚合物橡胶。  相似文献   

8.
光致变色全氟环戊烯类二芳烯化合物的合成及其性质研究   总被引:1,自引:0,他引:1  
合成了两种新的二芳基乙烯类光致变色化合物1,2-双(2-甲基-5-(4-乙氧基苯基)噻吩-3-基)全氟环戊烯(1a)和1,2-双(2-甲基-5-(对氟苯基)噻吩-3-基)全氟环戊烯(2a),并且研究了其在不同溶剂和浓度中的UV-Vis光谱、荧光性质和光致变色反应动力学特征.实验结果表明,化合物1a和2a具有良好的光致变色性质和较强的荧光;光致变色闭环反应为零级反应,开环反应为一级反应.  相似文献   

9.
《化学工程师》2004,(11):59-59
据专利介绍,这种聚合物可用于制备轮胎胎面,具有良好的抗湿滑性,其制备方法为在硫醇基硅烷化合物存在条件下,使共轭二烯类化合物或其混合物在水介质中与乙烯基芳香族单体进行聚合反应,即可制成。往一种含有20份水、4.5份松香酸性皂、70份丁二烯和30份苯乙烯的混合物中加入0.1份对甲烷过氧化氢、  相似文献   

10.
以自制的新型类双酚单体4-(3,4,5-三苯基-4-羟基苯基)-2,3-二氮杂萘-1-酮,与4,4′-二氟二苯酮反应,合成了一种新疆聚芳醚酮,对其聚合条件作了初步探讨;并利用核磁人振和红外光谱分析研究了类双酚单体及聚合物的结构,利用微分扫描式量热法和热重分析法对聚合物的耐热性进行了分析。实验结果表明,该类双酚单体具有与双酚单体类似的活性,可以进行聚合反应,由此合成的材料具有优异的综合性能。  相似文献   

11.
Hal S Blair  Ciaran B McArdle 《Polymer》1984,25(9):1347-1352
The monolayer characteristics of photochromic azo containing addition and condensationpolymers have been investigated under different conditions of illumination. Possible orientations of the polymers in the monolayers have been proposed. It was found that trans → cis photoisomerization of these materials was not always possible in the Langmuir films and photoinduced changes in monolayer area with time were followed for those polymers which showed uninhibited photoisomerization.  相似文献   

12.
Satu Strandman 《Polymer》2007,48(14):3938-3951
Two octafunctional resorcinarene-based ATRP initiators were synthesised where the initiating sites were separated from the macrocyclic ring with a short spacer. The spacer was introduced to reduce the steric hindrance at the initiating sites and to increase the number of arms in the resulting star polymers. Higher functionalities of starlike poly(tert-butyl acrylates), PtBA, and poly(methyl methacrylates), PMMA, were obtained, compared to the results by the initiators without a spacer. The kinetics of the polymerisations of tBA and MMA were investigated using various catalysts and solvents. The spacer increased the rate of the polymerisation of bulkier tBA monomer, but had little effect on the polymerisation of MMA.  相似文献   

13.
Three coordination polymers, namely, {[Zn(L)(BPY)]·DMF·H2O}n (1), {[Zn(L)(TPY)]·0.5H2BDC·H2O}n (2), {[Cd(L)(H2O)2]·DMF}n (3), have been synthesized based on a rigid linear carboxylate ligand (H2L = 2′,5′-dimethoxy-[1,1′:4′,1″-terphenyl]-4,4″-dicarboxylic acid) and different lengths of pyridine ligands (TPY = 4,3′:5′,4″-terpyridine; BPY = 4,4′-bipyridine). These complexes have been characterized by single crystal X-ray diffraction, infrared spectroscopy, thermogravimetry, elemental analysis, and powder X-ray diffraction measurements. Complex 1 is a 6-connected 3-fold interpenetrating pcu net with point symbol {412  63}, 2 and 3 can be simplified as 4-connected sql nets with point symbol {44  62}. In addition, their photoluminescent properties are also investigated in detail.  相似文献   

14.
为了改进聚丙烯酰胺在原油三次采收领域存在的耐温耐盐性能差等问题,采用无助溶剂的无皂乳液聚合方式,以微量(0.05mol%)辣素衍生单体N-[3-(丙烯酰氨基甲基)-2-羟基-4,5-二甲基苄基]-丙烯酰胺(HMMAM)为功能性单体,与甲基丙烯酸十八烷基酯(SMA)、甲基丙烯酸异冰片酯(IBOMA)等共聚合成新型疏水缔合聚合物PACSAM和PACIAM以提高聚丙烯酰胺的各项耐受性能。采用FTIR、1HNMR、TGA、SEM等进行结构和形貌表征;探讨聚合物的疏水缔合特性、耐温耐盐性、溶解性及缓蚀性能等。结果表明,PACIAM和PACSAM存在稳定的三维网状结构,临界缔合浓度分别为4.5 × 10-3 g/mL和4 × 10-3 g/mL,微量辣素衍生单体的引入使0.01 g/mL聚合物溶液在30℃下表观黏度提升至776 mPa·s和1224 mPa·s,90 ℃黏度保留率为37.57%和41.44%,在0.01 g/mL的NaCl溶液中黏度保留率为37.57%和42.12%,溶解速率为25 min和27 min,4 × 10-3 g/mL的聚合物溶液的缓蚀效率可达96.76%和97.28%,表明微量HMMAM的引入大大增加了聚合物的各项性能。  相似文献   

15.
A series of new 5,6‐bis(tetradecyloxy)‐2,1,3‐benzoselenadiazole‐based copolymers ( PBDT‐DTBSe, PC‐DTBSe , and PF‐DTBSe) have been first synthesized by Stille or Suzuki coupling polymerization reaction. The synthesized copolymers show good solubility in common organic solvents, such as chloroform, tetrahydrofuran, and chlorobenzene with excellent film‐forming properties. The molecular weight was determined by gel permeation chromatography and the thermal properties were investigated by thermogravimetric analysis. All the copolymers exhibited broad absorption from 350 to 700 nm. The preliminary results showed the device based on the structure of indium tin oxide/PEDOT : PSS/ PC‐DTBSe : PC61BM (1 : 2, w/w)/Ca/Al displayed the best photovoltaic performance with a power conversion efficiency of 1.35%, a Voc of 0.87 V, a Jsc of 3.84 mA/cm2 and a fill factor of 40.4%, under illumination of AM 1.5 G (100 mW/cm2). © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013  相似文献   

16.
Spatial resolution in far-field fluorescence microscopy is limited by diffraction to about 200 nm. With the aid of photoswitchable fluorophores, the diffraction barrier has been successfully overcome, allowing unprecedented resolution in the order of single biomolecules. The imaging process demands markers with strict and reliable control of the switching, to keep most of the markers in a non-emissive state most of the time and to bring a tiny number back to an emissive state, and detection at the single-molecule level. Herein, we describe the use of rhodamine spiroamides with unique photophysical properties as molecular probes for super-resolution techniques based on the localization of single emitters. This family of photochromic and fluorescent compounds fulfils the stringent requirements for such imaging methods; these compounds are robust and capable of enduring single-molecule detection in diverse environments. This has allowed meaningful images with resolution down to a few nanometres. Their design, synthesis and implementation is discussed along with imaging applications in material and life sciences.  相似文献   

17.
环糊精聚合物(CDPs)兼具了环糊精"内疏水?外亲水"的空腔结构特征和聚合物高分子稳定性的特点,是一类有巨大发展潜力的功能高分子材料。该文根据环糊精聚合物的结构特点对其进行分类并详细介绍了其合成方法,阐述了环糊精聚合物在食品、催化剂、化妆品、环境、医学、分离分析技术等多方面的应用研究。对环糊精聚合物的发展作了展望,为今后新型环糊精聚合物的制备及应用提供了参考依据。  相似文献   

18.
树枝状聚合物具有高度支化的结构和独特的单分散性,使这类聚合物具有特殊的性质和功能,在生物医药、材料改性、工业催化、石油工业等领域有着良好的应用前景。介绍了树枝状聚合物的结构特点、合成方法及应用。  相似文献   

19.
综述了疏水缔合型水溶性聚合物合成与表征方法,介绍了在合成过程中提高油溶性单体和水溶性单体混溶性的方法,简述了疏水物质含量的核磁共振、紫外光谱、裂解气相色谱等测定方法。  相似文献   

20.
We report the preparation, photoisomerization properties, and three‐dimensional (3D) microstructure fabrication with two‐photon polymerization of crosslinked azo‐polymers. A series of bi‐acrylate‐substituted azobenzene derivatives were designed and synthesized as the monomers and/or crosslinkers of the crosslinked azo‐polymers. The doping concentration of the derivatives in pre‐polymer resins was significantly increased due to the introduction of bulky tert‐butyl and flexible alkyl chains. The double‐exponential dynamics of trans‐to‐cis photoisomerization of the azo‐polymers indicated the coexistence of different processes for the azobenzene moieties in the polymeric crosslinked networks. The crosslinked azo‐polymers exhibited ideal “on–off” switching performance in the highly reversible transcistrans isomerization cycles. Furthermore, we prepared a photoresist containing the azobenzene derivative for 3D microstructure fabrication based on two‐photon polymerization. A woodpile photonic crystal with a photonic bandgap at telecommunication wavelength region was successfully fabricated with the azobenzene‐containing photoresist, which would open the way for the design and manufacturing of miniature optical communication devices. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2947–2956, 2013  相似文献   

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