Explanation

A polymer with a benzene ring as a chain link. According to the structural characteristics, polyphenylene is mainly divided into straight chain type and dendritic type. Linear polystyrene does not undergo significant decomposition in air below 400 ° C and can be used for a long time; In addition, the radiation resistance of polyphenylene is also very strong, and it also has the characteristics of photoluminescence and electroluminescence. Dendritic polyphenylene has high strength. polyphenylene with attractive chromophores has high quantum yield, good photoluminescence, electroluminescence and photochromism, and is a good electrode materials. Dendritic polyphenylene also has the properties of self-assembly and easy film formation. The synthesis of linear polystyrene can be achieved through chemical polymerization or electrochemical polymerization. Conductive polyphenylene can be obtained by chemical doping or ion implantation. Chemical polymerization polyphenylene is a dark brown, insoluble in organic solvents (or water) powder polymer. It has good thermal and thermal oxidation stability, as well as high-temperature hydrolysis stability. It can be obtained through chemical doping or ion implantation to obtain conductive polymer, which can be evaporated into a film under vacuum. The advantage of electrochemical polymerization method is that it is easy to prepare polystyrene film on the electrode. The synthesis of dendritic polymer includes the synthesis method of gradual convergence from outside to inside and the synthesis method of gradual diffusion growth from inside to outside. At present, there have been reports of dendritic polyphenylene with core-shell structure, single crystal structure and nanofibre structure. Undoped linear polystyrene can be used as an insulating layer for semiconductors in electronic devices; The doped polyphenylene, as a conductive phase, is mainly used as the electrode materials of rechargeable batteries; polyphenylene can be used as solid lubricant additive; As reinforcement and heat-resistant filler of rubber. The dendrimers are used in various electronic devices, sensors, optically pumped lasers, electroluminescent transistors, computer chips and drug delivery.

Classification