Supramolecular morphology of two-step, melt-spun poly(lactic acid) fibers

John A. Cicero, John R. Dorgan, Jay Janzen, James Garrett, James Runt, J. S. Lin

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Abstract

Fibers of poly(lactic acid) produced by twostep melt spinning have been studied. The morphology is elucidated with respect to the thermal and mechanical properties of fibers produced at cold-draw ratios of 1-8. With atomic force microscopy and small-angle X-ray scattering, a fibrillar morphology is found, with microfibril diameters ranging from 30 to 60 nm. Shrinkage properties indicate that, with increasing draw ratio, the fibers undergo a transition from class 2 to class 1 within the classification proposed by Keller. A supramolecular model for the morphology of the fibers is presented that entails a highly oriented skin with a core consisting of microfibrils. The orientation of the crystalline blocks within the microfibrils is similar to what has been reported for nylon fibers.

Original languageEnglish (US)
Pages (from-to)2828-2838
Number of pages11
JournalJournal of Applied Polymer Science
Volume86
Issue number11
DOIs
StatePublished - Dec 9 2002

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All Science Journal Classification (ASJC) codes

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

Cite this

Cicero, J. A., Dorgan, J. R., Janzen, J., Garrett, J., Runt, J., & Lin, J. S. (2002). Supramolecular morphology of two-step, melt-spun poly(lactic acid) fibers. Journal of Applied Polymer Science, 86(11), 2828-2838. https://doi.org/10.1002/app.11267