共查询到16条相似文献,搜索用时 93 毫秒
1.
2.
脱氯化氢法合成聚(2,5-二乙氧基对苯乙炔) 总被引:3,自引:0,他引:3
聚对苯乙炔(PPV)及其衍生物具有独特的光电性能,经强氧化剂掺杂后是一类重要的导电材料[1],而且具有良好的非线性光学(NLO)性质[2],也是目前为止性能最好的电致发光材料[3],因而PPV及其衍生物的合成成为电致发光领域研究的热点之一。目前国内外... 相似文献
3.
4.
5.
可溶性聚对二乙炔苯的合成与表征 总被引:2,自引:0,他引:2
一些π-共轭高聚物由于具有优良的荧光性能或三阶非线性光学性能而引起了人们极大的兴趣,合成新型可溶性π-共轭高聚物的研究已成为近年来的研究热点.对二乙炔苯的聚合研究已有报道. 相似文献
6.
7.
8.
9.
10.
11.
两种[对苯乙炔-2,5-二(十二烷氧基)对苯乙炔]共聚物的合成及性能研究 总被引:3,自引:0,他引:3
用含氯前聚物路线和Heck反应分别合成[对苯乙炔-2,5-二(十二烷氧基)对苯乙炔]无规共聚物及交替共聚物.由元素分析、凝胶渗透色谱、吸收光谱及DSC对其进行表征,研究了共聚物的组成与导电率、溶解性及发光性能的关系.比较了无规共聚物与交替共聚物在性能上的差别. 相似文献
12.
聚[2-甲氧基-5-(4-溴-丁氧基)对苯乙炔]新型前聚物的合成及表征] 总被引:1,自引:0,他引:1
采用不同方法由三锍盐合成新型的聚电解质前聚物及可溶于有机溶剂的侧链溴代聚对苯乙炔前聚物,发现侧链烷氧取代基上的锍盐并不参与聚合,所得前聚物加热后都可转化为聚对苯乙炔.光物理初步研究表明,溴代侧链聚对苯乙炔与C60掺杂后具有良好的光电特性.以IR、UV-Vis、1H NMR、DSC对单体及前聚物进行了表征. 相似文献
13.
主链含噁二唑的离子传导型聚对苯乙炔衍生物的合成及发光性能 总被引:12,自引:0,他引:12
通过共聚合将噁二唑结构单元引入苯乙炔(PPV)主链,以改进电子注入与传输性能;用离子传导型的聚氧乙烯(PEO)链作为高分子的侧链.用该种聚合物制作的发光二极管(LED)与不含噁二唑的同类结构的共轭聚合物相比,性能明显提高,并制作了发光电池(LEC),对其性能进行初步研究. 相似文献
14.
相转移催化法合成聚(2,5-二丁氧基对苯乙炔) 总被引:1,自引:0,他引:1
利用相转移催化剂(PTC)一步合成了聚(2,5-二丁氧基对苯乙炔)。研究了PTC种类、用量、反应时间、温度和碱浓度对反应产率的影响,并对产物的结构和性能进行了分析。初步探讨了其聚合机理。实验结果表明:季铵盐的催化效果优于聚乙二醇,二甲亚砜、苯等可作为有机相用于聚合反应。碱浓度为50%、反应温度为60℃时,产物在硝基苯中具有较好的溶解性。经碘掺杂后导电率达9.6×10~(-2)S·cm~(-1)。 相似文献
15.
Jeffrey H. Simpson David M. Rice Frank E. Karasz 《Journal of Polymer Science.Polymer Physics》1992,30(1):11-18
Solid-state 2H quadrupole echo nuclear magnetic resonance (NMR) spectra and measurements of 2H spin lattice relaxation times have been obtained for films of poly(p-phenylene vinylene) deuterated in phenylene ring positions (PPV-d4). NMR line shapes show that all the phenylene rings of PPV undergo 180° rotational jumps about the 1,4 ring axis (“ring flips”) at 225°C. The temperature dependence of the 2H line shapes show that the jump motion is thermally activated, with a median activation energy, Ea = 15 kcal/mol, and a distribution of activation energies of less than ±2 kcal/mol. The jump rate was also determined from the magnitude of the anisotropic T2 relaxation associated with 2H line shapes and from the curvature of inversion recovery intensity data. The experimental activation energy for jumps is comparable to the intramolecular potential barrier for rotation about phenylene vinylene bonds. 2H NMR provides a method for determining the phenylene-vinylene rotational barrier in pristine PPV, and may potentially be used to study conjugation in conducting films. 相似文献
16.
The molecular dynamics of p-phenylene vinylene (PPV) oligomers, synthesised by a condensation reaction and separated by molecular distillation, have been investigated using the electrooptic Kerr effect. The experimental Kerr constants of these materials change sign from positive to negative in going from n = 1 to n = 2 and are not in good agreement with theoretical results. The discrepancies, which increase in magnitude as n increases, can be attributed to solvent-solute interactions, the nonplanar nature of PPV oligomers, or the nonvalidity of the additivity scheme chosen for calculation of theoretical quantities. © 1996 John Wiley & Sons, Inc. 相似文献