Surface characterization of tyrosine-derived polycarbonates

Víctor H. Pérez-Luna, Kimberly A. Hooper, Joachim Kohn, Buddy D. Ratner

Research output: Contribution to journalArticlepeer-review


The surfaces of five biodegradable tyrosine-derived polycarbonates were studied using contact angle measurements, ESCA, and static SIMS. The wettability, critical surface tension, and polarity of these polymers decreased with increasing chain length of the pendent alkyl groups. Surface elemental composition, as determined by ESCA, was consistent with the stoichiometry of the repeat unit of the polymers. High-resolution C1s, O1s, and N1s ESCA spectra also showed results consistent with the different bonding states of these elements in the polymer repeat unit. In both positive and negative ion spectra, SIMS experiments showed fragment ions characteristic of the polymer backbone. Fragment ions characteristic of the pendent groups were identified in the negative ion SIMS spectra only, while the positive SIMS spectra provided a characteristic fingerprint for each polymer.

Original languageEnglish (US)
Pages (from-to)1467-1479
Number of pages13
JournalJournal of Applied Polymer Science
Issue number11
StatePublished - Mar 14 1997

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry


  • Biomaterials
  • Contact angle
  • ESCA
  • Polycarbonates
  • SIMS
  • Surface analysis
  • Tyrosine


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