Citation: Kangyuan Xie, Shen Chen, Zhi Ye, Min Chen, Hanying Li. Unveiling the intrinsic dielectric constant of form Ⅲ iPB-1 single crystals[J]. Chinese Chemical Letters, ;2026, 37(10): 112165. doi: 10.1016/j.cclet.2025.112165 shu

Unveiling the intrinsic dielectric constant of form Ⅲ iPB-1 single crystals

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China

chenmin_0202@zju.edu.cn

hanying_li@zju.edu.cn

Received Date: 4 November 2025
Revised Date: 23 November 2025
Accepted Date: 24 November 2025
Available Online: 24 November 2025

Figures(4)

Polymer lamellar single crystals (PLSCs), the fundamental crystalline units of semicrystalline polymers, are ideal model systems to probe intrinsic structure-property relationships of polymer dielectrics. However, the reliable preparation and characterization of PLSCs remain challenging. Here, using a controlled solvent evaporation method, large-area isotactic poly(1-butene) (iPB-1) single crystals with lateral dimension spanning several hundred micrometers were directly grown on conductive substrates. This, in turn, enables straightforward fabrication of metal–insulator–metal (MIM) capacitors, and facilitates the subsequent determination of the dielectric constant for form Ⅲ iPB-1 single crystals with a remarkably low value of 1.82 ± 0.05. This low value is attributed to suppressed chain-segmental motion and low molecular packing density of form Ⅲ crystal phase. This study provides a model framework for quantifying the intrinsic dielectric performance of crystalline phase in semicrystalline polymer systems and highlighting the importance of crystal structure in determining the macroscopic behavior of polymeric dielectrics.
- Polymer single crystals,
- Poly(1-butene),
- Polymer dielectrics,
- Dielectric constant,
- Capacitor devices
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