Preparation and properties of MDA-BAPP-BTDA copolyimide/18-crown ether-6 supramolecular films with inclusion structure and ultralow dielectric constants

In order to obtain polyimide composites with ultra-low dielectric constant, a series of MDA-BAPP-BTDA copolyimides/18-crown ether-6 (CPI/18-CE) supramolecular films with inclusion structure were prepared. The effects of 18-CE on CPI’s thermal, mechanical, dielectric and water absorption properties w...

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Bibliographic Details
Published in:Materials research express 2021-07, Vol.8 (7), p.75310
Main Authors: Xiao, Chunguang, Li, Duxin, Lang, Feng, Xiang, Yu, Lin, Yi, Ou, Baoli
Format: Article
Language:English
Subjects:
copolyimide
crown ether
Crown ethers
dielectric constant
Dielectric loss
Dielectric properties
Dielectric strength
Elongation
inclusion structure
mechanical properties
Modulus of elasticity
Permittivity
supramolecular films
Tensile strength
Thermodynamic properties
Water absorption
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Summary:In order to obtain polyimide composites with ultra-low dielectric constant, a series of MDA-BAPP-BTDA copolyimides/18-crown ether-6 (CPI/18-CE) supramolecular films with inclusion structure were prepared. The effects of 18-CE on CPI’s thermal, mechanical, dielectric and water absorption properties were investigated. The inclusion rate of 18-CE to CPI backbone was ∼50%. The introduction of 18-CE slightly reduced the thermal properties of CPI/18-CE supramolecular films, but greatly improved their mechanical, dielectric and hydrophobic properties. The tensile strength, young’s modulus and elongation at break of CPI/18-CE supramolecular films were maximally increased by 21.8%, 34.1% and 92.9% respectively. Meanwhile their dielectric constant, dielectric loss and water absorption were as low as 2.10, 0.007 and 0.63%, respectively. In summary, CPI/18-CE supramolecular films possess excellent dielectric properties and broad application prospect in the field of microelectronics.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ac161f