文献类型：期刊文献

英文题名：Polyimide Films Based on β-Cyclodextrin Polyrotaxane with Low Dielectric and Excellent Comprehensive Performance

作者：Zhang, Xuexin[1];Dou, Yao[1,2];Liu, Liqun[1];Song, Meixuan[1];Xi, Zhenhao[1,2];Xu, Yisheng[1];Shen, Weihua[1];Wang, Jie[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：16

期号：7

外文期刊名：POLYMERS

收录：;EI(收录号：20241615914712);WOS:【SCI-EXPANDED(收录号:WOS:001201066100001)】；

基金：No Statement Available

语种：英文

外文关键词：colorless polyimide; beta-cyclodextrin; semi-aromatic; dielectric constant

摘要：In order to prepare polyimide (PI) films with a low dielectric constant and excellent comprehensive performance, a two-step method was employed in this study to integrate beta-cyclodextrin into a semi-aromatic fluorine-containing polyimide ternary system. By introducing trifluoromethyl groups to reduce the dielectric constant, the dielectric constant was further reduced to 2.55 at 10 MHz. Simultaneously, the film exhibited noteworthy thermal stability (a glass transition temperature exceeding 300 degrees C) and a high coefficient of thermal expansion. The material also demonstrated outstanding mechanical properties, boasting a strength of 122 MPa and a modulus of 2.2 GPa, along with high optical transparency (transmittance reaching up to 89% at 450 nm). Moreover, the inherent high transparency of colorless polyimide (CPI) combined with good stretchability contributed to the attainment of a low dielectric constant. This strategic approach not only opens up new opportunities for novel electroactive polymers but also holds potential applications in flexible displays, circuit printing, and chip packaging.