Morphological and Electronic Properties of Poly(ethylene glycol)/RAMEB Polyrotaxane and Polypyrrole Supramolecular Networks,Macromolecular Chemistry and Physics

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Morphological and Electronic Properties of Poly(ethylene glycol)/RAMEB Polyrotaxane and Polypyrrole Supramolecular Networks
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-03-24 , DOI: 10.1002/macp.202000011
Ana‐Maria Resmerita ₁ , Mihai Asandulesa ₁ , Aurica Farcas ₁

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The effect of 10 wt% polypyrrole (PPy) incorporation on the evolution of conductivity, dielectric constant, and dielectric loss by varying the temperature and frequency of amine‐terminated poly(ethylene glycol)/randomly methylated β‐cyclodextrins (PEGBA/RAMEB) polyrotaxane cross‐linked with 1,6‐hexamethylene diisocyanate is reported. This composite material shows an enhanced dielectric constant value of 25.6 (at 10 Hz) compared with 8.3 of the pure cross‐linked PEGBA/RAMEB polyrotaxane. The values of the dielectric constant are consistent with the dielectric loss and conductivity results. The composite material shows that the direct current conductivity (σ_DC) at lower temperature is independent of frequency. In comparison, at higher temperature, σ_DC is dependent on frequency, denoting that the conductivity of the composite material is a thermally activated process. Moreover, the presence of PPy significantly influences the morphology of the cross‐linked PEGBA/RAMEB polyrotaxane. Addition of PPy into PEGBA/RAMEB material seems to be very attractive and should provide an opportunity to obtain desirable electronic properties.

中文翻译：

聚乙二醇/ RAMEB聚轮烷和聚吡咯超分子网络的形貌和电子性能

通过改变胺封端的聚乙二醇/随机甲基化的β-环糊精（PEGBA / RAMEB）聚轮烷的温度和频率，掺入10 wt％的聚吡咯（PPy）对电导率，介电常数和介电损耗的影响据报道与1,6-六亚甲基二异氰酸酯交联。与纯交联的PEGBA / RAMEB聚轮烷的8.3相比，这种复合材料的介电常数值提高了25.6（在10 Hz）。介电常数的值与介电损耗和电导率结果一致。复合材料表明，较低温度下的_直流电导率（σDC ）与频率无关。相比较而言，在较高的温度，σ _DC取决于频率，表示复合材料的电导率是热激活的过程。此外，PPy的存在会显着影响交联的PEGBA / RAMEB聚轮烷的形态。在PEGBA / RAMEB材料中添加PPy似乎非常有吸引力，应该为获得所需的电子性能提供机会。

更新日期：2020-03-24

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