Please use this identifier to cite or link to this item:
Title: Synthesis and characterization of polymer nanofoams
Authors: Zhang, YH
Li, Y
Huang, HT 
Ke, SM
Zhao, LH
Chan, HLW 
Keywords: Dielectric constants
Issue Date: 2007
Publisher: Scientific.Net
Source: Key engineering materials, 2007, v. 334-335 II, p. 821-824 How to cite?
Journal: Key engineering materials 
Abstract: In order to obtain thin film dielectric layers with very low dielectric constants for use in microelectronic devices, polyimide nanofoamed films has been prepared from the polyimide precursors (PMDA-ODA) and poly(ethylene oxide) (PEO) in N,N-dimethylacetamide. The synthesization process included blending polyimide as the major phase with a minor phase of the thermally labile PEO blocks. The foamed films were characterized by a variety of experiments including TG and SEM, and the experimental results indicated that the labile PEO would undergo oxidative thermolysis to release small moleculars from the matrix so as to leave voids into the polyimide matrix. The dielectric properties of the films were studied over broad frequency ranges. The dependences of dielectric constant on the PEO content in the films and frequency were discussed. The films with a proper amount of PEO displayed relatively low dielectric constant compared to the pure polyimide film. Thin film foams with high thermal stability and low dielectric constants can be prepared using the approach.
ISSN: 1013-9826
EISSN: 1662-9795
Appears in Collections:Conference Paper

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Aug 16, 2018

Page view(s)

Last Week
Last month
Citations as of Aug 13, 2018

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.