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Issue 5, 2008
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Ultra-low-κ materials derived from poly(D,L-lactide-b-pentafluorostyrene) diblock copolymers

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Well-defined diblock copolymers of D,L-lactide and pentafluorostyrene with narrow molecular weight distributions (polydispersity index <1.25) were successfully synthesized via sequential ring-opening and atom transfer radical polymerizations. Poly(D,L-lactide) is the minority component; microphase separation results in discrete poly(D,L-lactide) nanostructures organized in a polypentafluorostyrene matrix. The poly(D,L-lactide) block was then quantitatively degraded and removed via acid-catalyzed hydrolysis to yield a nanoporous fluorinated matrix with the same lattice dimensions as those of the parent diblock copolymer. These nanoporous fluorinated films have overall dielectric constants <2.0, making them suitable candidates as interlayer metal insulators in microelectronic applications. Further, the dielectric constants of these films can be tuned by adjusting the amount of poly(D,L-lactide) in the parent diblock copolymers during synthesis.

Graphical abstract: Ultra-low-κ materials derived from poly(d,l-lactide-b-pentafluorostyrene) diblock copolymers

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Publication details

The article was received on 28 Sep 2007, accepted on 16 Nov 2007 and first published on 30 Nov 2007

Article type: Paper
DOI: 10.1039/B714941G
Citation: J. Mater. Chem., 2008,18, 530-536
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    Ultra-low-κ materials derived from poly(D,L-lactide-b-pentafluorostyrene) diblock copolymers

    T. L. Bucholz, S. P. Li and Y. Loo, J. Mater. Chem., 2008, 18, 530
    DOI: 10.1039/B714941G

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