离子液体对聚酰胺610分子链段运动与电荷存储特性的影响

Effect of Ionic Liquid on Chain Segment Motion and Charge Detrapping in Ionic Liquid/Polyamide 610 Blends

通过热刺激电流、差示扫描量热和扫描电镜研究离子液体对聚酰胺610结构的变化以及热刺激电流所反映偶极取向松弛和空间电荷的受陷、退陷和陷阱能级变化。可知离子液体/聚酰胺610复合材料偶极松弛和空间电荷松弛峰形状、强度显著依赖于离子液体含量。离子液体增塑使得偶极松弛峰电流强度增大,活化能减弱。随着离子液体含量增大,非晶区和晶区陷阱俘获空间电荷能力增加。离子液体含量增大使得非晶区被俘获空间电荷的稳定性下降、晶区被俘获空间电荷的稳定性基本不变。

The effect of ionic liquid on the chain segment motion and charge detrapping in polyamide 610 and ionic liquid /polyamide 610 blends was investigated by thermally stimulated depolarization current( TSDC),differential scanning calorimetry( DSC) and scanning electron microscopy( SEM). There are three current peaks( named α,ρ1and ρ2peak respectively) in TSDC spectra of polyamide 610 and ionic liquid /nylon 610 blends. The α peak corresponds to glass transition,the ρ1peak is attributed to space charge trapped in the amorphous phase,and the ρ2peak is originated from space charge trapped in the crystalline phase. By analyzing the characteristic parameters of these peaks,it is found that the mobility of chain segments accelerates and structural defects increase with increase of the content of ionic liquid in blends. In addition,the stability of trapped charge in the amorphous phase decreases and the stability of trapped charge in crystalline phase doesn't change with increase of the content of ionic liquid.