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本文通过酯交换反应合成了一系列脂肪族聚丁二酸酯,对他们的结构和性能作了表征。发现聚酯存在多晶现象,其熔点有奇偶性变化规律。探索了由此系列聚酯与高氯酸锂形成的固体电解质的结构和离子导电性。无机盐的加入提高了电解质的玻璃化温度但降低了聚酯的熔点及结晶度。聚酯电解质的晶体类似于聚酯,其无机盐主要溶解于聚酯的无定形区域。聚酯系列电解质的导电率也有偶奇效应,与熔点变化相反;熔点高的电解质导电率低,熔点低的电解质导电率高。电解质的导电率随温度改变而变化,在室温下电解质的导电率可达10~(-6)s/cm。高分子链上侧基的引入将大大降低电解质的导电性。
In this paper, a series of aliphatic poly (succinic acid esters) were synthesized by transesterification and their structures and properties were characterized. Polyester was found to be polycrystalline, with variations in its melting point. The structure and ionic conductivity of the solid electrolyte formed from this series of polyesters and lithium perchlorate were explored. The addition of inorganic salts increases the glass transition temperature of the electrolyte but decreases the melting point and crystallinity of the polyester. Crystals of polyester electrolytes are similar to polyesters, with inorganic salts dissolved predominantly in the amorphous regions of the polyester. Polyester electrolyte series also has a coercive conductivity effect, and the opposite change in melting point; high melting point electrolyte conductivity is low, low melting point electrolyte conductivity. The conductivity of the electrolyte changes with temperature, the electrolyte conductivity at room temperature up to 10 ~ (-6) s / cm. The introduction of side groups on the polymer chain will greatly reduce the conductivity of the electrolyte.