超支化聚合物固体电解质的合成与表征研究

Hyperbranched polyether and hyperbranched polyurethane used as solid polymer electrolyte were synthesized and characterized, especially on conductivity. The water-soluble multi-arm star polymer based on hyperbranched polyglycerols was synthesized and characterized. The NMR analysis suggested that the Degree of branching (DB) of the core is 0.54 and the graft ratio is 4. XRD and DSC results suggest the sample is amorphous within the experiment range. The differences between the spin-spin relaxation times indicate that terminal segments of star are more flexible than the core..A series of polymer electrolytes based on multi-arm polymers and lithium salt complexes were prepared. The conductivity maximum appeared at a higher salt concentration (EO/Li=4). The conductivity increased with temperature and the dependence of ionic conductivity on temperature fits the Arrhenius equation. Among the studied systems, the star polymer with 5 arm number performances better than other structure .

本项目拟合成新型超支化聚合物固体电解质，并对其导电性能、形态结构和力学性能进行研究。主要内容包括：含反应官能团单体合成；不同组成和空间结构超支化聚合物的合成；离子化超支化聚合物合成；超支化离聚物导电性能研究；形态结构的表征和力学性能的测试。本项目工作具有创新性，有可能在超支化聚合物固体电解质研究方面取得新突破。