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

Tracy L. Bucholz, Sally Peng Li, Yueh Lin Loo

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)530-536
Number of pages7
JournalJournal of Materials Chemistry
Issue number5
StatePublished - 2008

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Materials Chemistry


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