• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and Chemical Properties of Dielectric Polyphenylenes with Nitro Group
【24h】

Synthesis and Chemical Properties of Dielectric Polyphenylenes with Nitro Group

机译：含硝基的电介质聚苯撑的合成及化学性质

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polyphenylenes consisting of nitrophenylene and didodecyloxy-p-phenylene units have been synthesized by Pd-catalyzed organometallic polycondensation. The polymers showed good solubility and had number-average molecular weights (M,,) of 13,000-37,000. Their spin-coated films showed fairly high dielectric constants (F) of 3.75-6.36. The polymers were electrochemically active with electrochemical reduction peaks in the range of -1.72 to -1.99 V versus Ag+/Ag in an acetonitrile solution of [NEt4]BF4 (0.10M). The polymer composed of 2,3'-dinitrobiphenyl and didodecyloxy-p-phenylene units showed thermotropic liquid crystalline phase at about 240 degrees C. Cast films of the polymer had a birefringent phase at room temperature, suggesting self-assembly of the polymer in the solid. XRD studies revealed that the polymers assumed an ordered structure assisted by aggregation of the long alkoxy side chains in the solid. The polymer main chain in the cast film is considered to be aligned parallel with respect to the surface of substrates. (c) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 2426-2435, 2009
机译：由Pd催化的有机金属缩聚反应合成了由硝基亚苯基和十二烷氧基-对亚苯基单元组成的聚亚苯基。该聚合物显示出良好的溶解性，并具有13,000-37,000的数均分子量（M，）。他们的旋涂膜显示出3.75-6.36的相当高的介电常数（F）。该聚合物具有电化学活性，在[NEt4] BF4（0.10M）的乙腈溶液中，相对于Ag + / Ag，电化学还原峰的范围为-1.72至-1.99V。由2,3'-二硝基联苯和双十二烷氧基-对亚苯基单元组成的聚合物在约240℃下显示出热致液晶相。该聚合物的流延膜在室温下具有双折射相，表明该聚合物在膜中的自组装。固体。 XRD研究表明，聚合物在固体中呈长烷氧基侧链聚集的形式，呈现出有序的结构。流延膜中的聚合物主链被认为相对于基材表面平行排列。 （c）2008 Wiley Periodicals，Inc. J Appl Polym Sci 111：2426-2435，2009

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号