Synthesis and Characterization of Rigid Rod Poly(p-phenylenes)
Synthesis and Characterization of Rigid Rod Poly(p-phenylenes)
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DOI：
10.1021/ma960124p
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发表时间：
1996-07
期刊：
影响因子：
5.5
通讯作者：
S. Vanhee;R. Rulkens;U. Lehmann;C. Rosenauer;M. Schulze;W. Köhler;G. Wegner
中科院分区：
文献类型：
--
作者：
S. Vanhee;R. Rulkens;U. Lehmann;C. Rosenauer;M. Schulze;W. Köhler;G. Wegner
由2-十二烷基-5-甲基-1，4-苯二硼酸的1，3-丙二醇二酯与2，2 ′-双（3，5-二叔丁基苯磺酸根合）-4，4 ′-二溴联苯在钯催化下偶联合成了由具有磺酸酯和十二烷基侧基的聚（对苯撑）主链组成的聚合物PP。得到具有各种摩尔质量的聚合物，其在常规有机溶剂中可溶而不聚集。这种棒状聚合物的良好溶解性使得可以通过光散射、渗透压测定法和具有通用校准的SEC准确测定摩尔质量。特性粘度[η]对摩尔质量的依赖性由Mark−Houwink−Sakurada方程和蠕虫状链模型确定。余辉长度的低值（13 nm）表明这些聚合物是相对柔性的。它表明，持久长度的近似值，连同马克-Houwink-樱田方程和蠕虫链模型的参数，可以确定…
The polymer PP, which consists of a poly(p-phenylene) backbone with sulfonate ester and dodecyl side groups, is synthesized by a Pd-catalyzed coupling of the 1,3-propanediol diester of 2-dodecyl-5-methyl-1,4-benzenediboronic acid with 2,2‘-bis(3,5-di-tert-butylbenzenesulfonato)-4,4‘-dibromobiphenyl. Polymers with various molar masses are obtained, which are soluble without aggregation in conventional organic solvents. The good solubility of this rodlike polymer allows the accurate determination of the molar mass by light scattering, osmometry, and SEC with universal calibration. The dependence of the intrinsic viscosity [η] on the molar mass is determined from both the Mark−Houwink−Sakurada equation and the wormlike chain model. The low value of the persistence length (13 nm) indicates that these polymers are relatively flexible. It is shown that an approximate value of the persistence length, together with the parameters of the Mark−Houwink−Sakurada equation and the wormlike chain model, can be determine...