the low dielectric and high adhesive polyimide/fluorinated ethylene propylene(PI/FEP)nanocomposite film for high-frequency flexible circuit board application is developed.It is indicated that the fluorocarbon surfactants can significantly improve the dispersion of FEP in PI substrate,and thus,the PI/FEP ...
Low dielectric polyimide/poly(silsesquioxane)-like nanocomposite material. Tsai MH,Whang W-T. Polymer . 2001Tsai,M.H. and Wang,W.T., Low dielectric polyimide/poly (silsesquioxane)-like nanocomposite material, Polymer, Vol.42, 2001, 4197-4207....
Physical Properties and Stress Analysis of Low Dielectric Polyimide Films Containing Adamantane Pendant Group. Yoo, Dong Keun,Lim, Sang Kyun,Tae, Ho Yoon,Kim, Dukjoon. Polymer Journal . 2003Yoo D K,Lim S K,Yoon T H,Kim D. Physical Properties and Stress Analysis of Low Dielectric Polyimide ...
PROBLEM TO BE SOLVED: To provide a heat-resistant resin having low dielectric constant.;SOLUTION: This polyimide composition is composed of a recurring unit represented by general formula (2) and is characterized by having 1,000-1,000,000 weight-average molecular weight. [In general formula (2...
Progress in synthesis of low dielectric constant polyimide in past decade reviewed.The methods included incorporation of nano-pore into polyimide matrix by physical or chemical means. Researches mainly focused on method of grafting nano-porous organic/inorganic materials into polyimide matrix to decrease ...
Low dielectric polyimide aerogels as substrates for lightweight patch antennas ACS Appl. Mater. Interfaces, 4 (2012), pp. 6346-6353 Google Scholar [39] I.A. Ronova, M. Bruma, H.-W. Schmidt Conformational rigidity and dielectric properties of polyimides Struct. Chem., 23 (2012), pp. 219...
When At-PDMS was introduced into the polyimide chain, the polyimide copolymers exhibited lower dielectric constants and better moisture resistance and mechanical properties. The reductions in the dielectric constant of the PI-PDMS copolymers Could be attributed to the incorporation of polydimethylsiloxane ...
Interactions between fluorinated polyimide and aluminum under different thermal treatment conditions have been investigated using transmission electron microscopy (TEM) and x-ray diffractometry (XRD) techniques over a wide temperature range. Our results suggest that the oxygen from the dielectric materials ma...
A series of copolyimide (co-PI) fibers with low dielectric constants and excellent comprehensive properties have been successfully prepared via a two-step wet-spinning method by incorporating 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl (TFMB) into rigid polymer backbones of 3,3′,4,4′-...
An relaxation process at below the glass transition temperature of the polyimide nanofoamed films was found. The peak value of the dielectric loss increased with increasing amount of PEO. 展开 关键词: Dielectric constant Dielectric thin films Dielectric relaxation Dielectrics Activation energies ...