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|Title:||Nanoporous ultra-low-dielectric-constant fluoropolymer films via selective UV decomposition of poly(pentafluorostyrene)-block-poly(methyl methacrylate) copolymers prepared using atom transfer radical polymerization|
|Source:||Fu, G.-D., Yuan, Z., Kang, E.-T., Neoh, K.-G., Lai, D.M., Huan, A.C.H. (2005-02). Nanoporous ultra-low-dielectric-constant fluoropolymer films via selective UV decomposition of poly(pentafluorostyrene)-block-poly(methyl methacrylate) copolymers prepared using atom transfer radical polymerization. Advanced Functional Materials 15 (2) : 315-322. ScholarBank@NUS Repository.|
|Abstract:||Block copolymers of poly(pentafluorostyrene) (PFS) and poly(methyl methacrylate) (PMMA) (PFS-b-PMMA) have been synthesized using atom transfer radical polymerization (ATRP). Then, nanoporous fluoropolymer films have been prepared via selective UV decomposition of the PMMA blocks in the PFS-b-PMMA copolymer films. The chemical composition and structure of the PFS homopolymers and copolymers have been characterized using nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), time-of-flight secondary-ion mass spectrometry (ToF-SIMS), and molecular-weight measurements. The cross-sectional and surface morphologies of the PFS-b-PMMA copolymer films before and after selective UV decomposition of the PMMA blocks have been studied using field-emission scanning electron microscopy (FESEM). The nanoporous fluoropolymer films with pore sizes in the range 30-50 nm and porosity in the range 15-40 % have been obtained from the PFS-b-PMMA copolymers of different PMMA content. Dielectric constants approaching 1.8 have been achieved in the nanoporous fluoropolymer films which contain almost completely decomposed PMMA blocks. © 2005 WILEY-VCH Verlag GmbH & Co. KgaA, Weinheim.|
|Source Title:||Advanced Functional Materials|
|Appears in Collections:||Staff Publications|
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