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Journal of Polymer Research
Erschienen in: Journal of Polymer Research 12/2014

01.12.2014 | Original Paper

Enhancing the crystallization and orientation of electrospinning poly (lactic acid) (PLLA) by combining with additives

verfasst von: Ahmed M. El-Hadi, Saeed D. Mohan, Fred J. Davis, Geoffrey R. Mitchell

Erschienen in: Journal of Polymer Research | Ausgabe 12/2014

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Abstract

PLLA is a thermoplastic biopolymer and can be used in industrial applications for medical and filtration applications. The brittleness of PLLA is attributed to slow crystallization rates and its glass transition temperature (Tg) is high (60 °C); for this reason, its applications are limited. The orientation, morphology, and crystal structure of the electrospun fibers was investigated by SEM, POM, DSC, FTIR, XRD, and SAXS. Combining with additives leads to a large decrease of fiber diameter, viscosity, and changes of fiber morphology and crystal structure compared to pure PLLA. DSC showed that the Tg of PLLA decreased about 15 °C and there was no change in relaxation enthalpy by the addition of plasticizer. FT-IR indicate a strong interaction between PLLA and additives; a new band appears in the PLLA blend at 1,756 cm−1 at room temperature as a crystalline band without any annealing. In addition, WAXD indicated that the intensities of the two peaks at (200/110) and (203) increased for the blend at room temperature without any annealing in comparison with PLLA; this means that PHB crystallizes in the amorphous region of PLLA. The POM experiments agree with the results from DSC, FTIR, and WAXS measurements, confirming that adding PHB results in an increase in the number of nuclei with much smaller spherulites and enhances the crystallization behavior of this material, thereby improving its potential for applications.
Vorheriger Artikel Solution behavior and associating structures of a salt-tolerant tetra-polymer containing an allyl-capped macromonomer
Nächster Artikel Molecular simulation and experimental studies of the miscibility of chitosan/poly(ethylene oxide) blends

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Metadaten
Titel
Enhancing the crystallization and orientation of electrospinning poly (lactic acid) (PLLA) by combining with additives
verfasst von
Ahmed M. El-Hadi
Saeed D. Mohan
Fred J. Davis
Geoffrey R. Mitchell
Publikationsdatum
01.12.2014
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 12/2014
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-014-0605-2

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