Please use this identifier to cite or link to this item: https://doi.org/10.1039/b315129h
Title: Ultra-low-κ materials based on nanoporous fluorinated polyimide with well-defined pores via the RAFT-moderated graft polymerization process
Authors: Chen, Y.W.
Wang, W.C.
Yu, W.H.
Kang, E.T. 
Neoh, K.G. 
Vora, M.H.
Ong, C.K. 
Chen, L.F. 
Issue Date: 7-May-2004
Source: Chen, Y.W., Wang, W.C., Yu, W.H., Kang, E.T., Neoh, K.G., Vora, M.H., Ong, C.K., Chen, L.F. (2004-05-07). Ultra-low-κ materials based on nanoporous fluorinated polyimide with well-defined pores via the RAFT-moderated graft polymerization process. Journal of Materials Chemistry 14 (9) : 1406-1412. ScholarBank@NUS Repository. https://doi.org/10.1039/b315129h
Abstract: Thermally-initiated living radical graft polymerization of poly(ethylene glycol) methyl ether methacrylate (PEGMA) with ozone-pretreated fluorinated polyimide (FPI) via the reversible addition-fragmentation chain transfer (RAFT)-moderated process was carried out. The chemical composition and structure of the copolymers were characterized by nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA), and molecular weight measurements. The "living" character of the grafted PEGMA side chains was ascertained in the subsequent extension of the PEGMA side chains. Nanoporous ultra-low dielectric constant (K) fluorinated polyimide films were prepared by solution casting of the graft copolymers, followed by thermal decomposition of the labile PEGMA side chains in air. The nanoporous FPI films obtained from the RAFT-moderated graft copolymers had well-preserved FPI backbones, porosity in the range of 2-10% and pore size in the range of 20-50 nm. These films also had more well-defined pores, more uniform pore size distribution, and better-retained mechanical properties than those of the corresponding nanoporous FPI films obtained from the graft copolymers prepared by the conventional free-radical process. Dielectric constants approaching 2.0 were obtained for the nanoporous FPI films prepared from the RAFT-moderated graft copolymers.
Source Title: Journal of Materials Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/64765
ISSN: 09599428
DOI: 10.1039/b315129h
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

49
checked on Dec 5, 2017

WEB OF SCIENCETM
Citations

44
checked on Nov 14, 2017

Page view(s)

45
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


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