AI Article Synopsis
- Researchers created melt-spun fibers from poly(ε-caprolactone) (PCL) using special inclusion complex crystals with urea.
- The study showed that these coalesced fibers have significantly higher stiffness (moduli) compared to regular PCL fibers, particularly after being drawn.
- The unique alignment of molecules in the coalesced fibers leads to improved mechanical properties, making them suitable for applications like tissue engineering scaffolds.
Article Abstract
Melt-spun fibers were made from poly(ε-caprolactone) (PCL) coalesced from stoichiometric inclusion complex crystals formed with host urea. Melting and crystallization behaviors, mechanical properties, and the birefringence of undrawn and cold-drawn fibers were investigated. Undrawn coalesced PCL fibers were observed to have 500-600% higher moduli than undrawn as-received (asr) PCL fibers and a modulus comparable to drawn asr PCL fibers. Drawn coalesced PCL fibers have the highest crystallinity, orientation, and 65% higher moduli than drawn asr PCL fibers. Drawn coalesced PCL fibers have only a 5% higher crystallinity than drawn asr PCL fibers, yet they have 65% higher moduli and lower elongation at break values. Clearly, the intrinsic alignment of the coalesced polymers is the reason for their higher moduli and lower elongation, as confirmed by the birefringence observed in drawn coalesced and asr-PCL fibers. The improved mechanical properties of coalesced PCL fibers make them a better candidate for use in tissue engineering as scaffolds.
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| http://dx.doi.org/10.1021/bm501799y | DOI Listing |
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