Synthesis, processing and tensile testing of a poly(l -lactide-co-caprolactone) monofilament fiber for use as an absorbable surgical suture

Sujitra Ruengdechawiwat, Robert Molloy*, Jintana Siripitayananon, Runglawan Somsunan, Paul D. Topham, Brian J. Tighe

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A poly(l-lactide-co-caprolactone), P(LL-co-CL), 75:25 mol % copolymer was synthesized via the bulk ring-opening copolymerization of l-lactide (LL) and ε-caprolactone (CL) at 130 °C for 48 hrs. The P(LL-co-CL) copolymer obtained was characterized in terms of its molecular weight (GPC), copolymer composition (1H-NMR), monomer sequencing (13C-NMR) and thermal properties (DSC, TGA). For processing, the P(LL-co-CL) was melt spun into a monofilament fiber with fast cooling and minimal draw in order to produce an as-spun fiber that was largely amorphous and unoriented. This enabled the required oriented semi-crystalline morphology to be gradually built into the as-spun fiber in a series of controlled off-line annealing and hot-drawing steps. The final fiber, which combined sufficient tensile strength with flexibility for use as a suture material, exhibited a stress and strain at break of 344 MPa and 70%, respectively.

Original languageEnglish
Pages (from-to)347-353
Number of pages7
JournalMacromolecular Symposia
Volume354
Issue number1
DOIs
Publication statusPublished - 25 Aug 2015

Keywords

  • absorbable monofilament suture
  • fibers
  • l -Lactide
  • melt spinning
  • ring-opening polymerization
  • ε-caprolactone

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