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 language | English (US) |
|---|---|
| Pages (from-to) | 2828-2838 |
| Number of pages | 11 |
| Journal | Journal of Applied Polymer Science |
| Volume | 86 |
| Issue number | 11 |
| DOIs | |
| State | Published - Dec 9 2002 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Surfaces, Coatings and Films
- Polymers and Plastics
- Materials Chemistry
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Supramolecular morphology of two-step, melt-spun poly(lactic acid) fibers. / Cicero, John A.; Dorgan, John R.; Janzen, Jay; Garrett, James; Runt, James Patrick; Lin, J. S.
In: Journal of Applied Polymer Science, Vol. 86, No. 11, 09.12.2002, p. 2828-2838.Research output: Contribution to journal › Article
TY - JOUR
T1 - Supramolecular morphology of two-step, melt-spun poly(lactic acid) fibers
AU - Cicero, John A.
AU - Dorgan, John R.
AU - Janzen, Jay
AU - Garrett, James
AU - Runt, James Patrick
AU - Lin, J. S.
PY - 2002/12/9
Y1 - 2002/12/9
N2 - 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.
AB - 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.
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U2 - 10.1002/app.11267
DO - 10.1002/app.11267
M3 - Article
VL - 86
SP - 2828
EP - 2838
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
SN - 0021-8995
IS - 11
ER -