论文部分内容阅读
通过叠氮化超支化聚苯乙烯(HBPS-N3)与端炔基聚乙二醇单甲醚(ay-PEO)的点击反应,合成了以超支化聚苯乙烯(HBPS)为核、不同分子量的聚氧化乙烯(PEO)为臂的多臂星形聚合物(HBPS-PEO),并利用ATR-FTIR,1H-NMR,GPC对合成的星形聚合物的结构进行了表征.将该种星形聚合物与双三氟甲基磺酰亚胺锂(LiTFSI)进行复合,制备了星形聚合物为基体的聚合物电解质,通过交流阻抗技术和DSC对该聚合物电解质的离子导电性能及热性能进行了研究.结果表明,星形结构可以在一定程度上抑制结晶的形成,这种新型的星形聚合物电解质的室温电导率明显高于相应的线形聚合物电解质,当n(EO)/n(Li)=40,PEO臂的分子量为1000时,该星形聚合物电解质的离子电导率最高,30℃时为6.7×10-5Scm-1,40℃时可以达到1.2×10-4Scm-1;TGA结果表明,制备的星形聚合物的初始分解温度(Tonset)都高于360℃,具有良好的热稳定性.
Through the click reaction of azidated hyperbranched polystyrene (HBPS-N3) and a-PEO (a-PEO) (PEPS) as the arm multi-arm star polymer (HBPS-PEO), and the structure of the synthesized star polymer was characterized by ATR-FTIR, 1H-NMR and GPC. Polymer was synthesized with lithium bistrifluoromethanesulfonimide (LiTFSI) to prepare a polymer electrolyte based on a star polymer. The ion conductivity and thermal properties of the polymer electrolyte were characterized by AC impedance spectroscopy and DSC The results show that the star structure can inhibit the formation of the crystal to a certain degree. The new star polymer electrolyte has higher room temperature conductivity than the corresponding linear polymer electrolyte. When n (EO) / n (Li) = 40, the molecular weight of the PEO arms is 1000, the star polymer electrolyte has the highest ionic conductivity of 6.7 × 10-5Scm-1 at 30 ℃, and can reach 1.2 × 10-4Scm- 1; TGA results show that the initial decomposition temperature (Tonset) of the prepared star polymer is higher than 360 ℃, has good thermal stability.