Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Electrospun Polylactide – Poly(ε-Caprolactone) Fibers: Struсture Characterization and Segmental Dynamic Response

S. G. Karpova
,
A. A. Olkhov
ORCID logo ,
I. A. Varyan
* ,
O. I. Khan
,
A.A. Botin
,
A. V. Naletova
,
A. A. Popov
,
A. L. Iordanskii
* ORCID logo
Version 1 : Received: 29 March 2024 / Approved: 1 April 2024 / Online: 2 April 2024 (12:43:15 CEST)

How to cite: Karpova, S.G.; Olkhov, A.A.; Varyan, I.A.; Khan, O.I.; Botin, A.; Naletova, A.V.; Popov, A.A.; Iordanskii, A.L. Electrospun Polylactide – Poly(ε-Caprolactone) Fibers: Struсture Characterization and Segmental Dynamic Response. Preprints 2024, 2024040063. https://doi.org/10.20944/preprints202404.0063.v1 Karpova, S.G.; Olkhov, A.A.; Varyan, I.A.; Khan, O.I.; Botin, A.; Naletova, A.V.; Popov, A.A.; Iordanskii, A.L. Electrospun Polylactide – Poly(ε-Caprolactone) Fibers: Struсture Characterization and Segmental Dynamic Response. Preprints 2024, 2024040063. https://doi.org/10.20944/preprints202404.0063.v1

Abstract

Electrospun ultrathin fibers based on binary compositions of polylactide (PLA) and poly(ε-caprolactone) (PCL) with different ratios of polymer components from 0/100 to 100/0 wt. % were studied. Using a combination of thermal (DSC) and relaxation (EPR) measurements, the effect of biopolymers content on the characteristics of the crystal structure of PLA and PCL and the diffusive rotational mobility of the stable TEMPO radical in the amorphous regions of PLA/PCL compositions was shown. It was revealed that after PLA and PCL blending, significant changes in the degree of crystallinity of PLA, PCL segmental mobility, sorption capacity of the radical as well as activation energy of rotational diffusion in the amorphous regions of PLA/PCL composition are observed. The characteristic region of biopolymers’ composition from 50/50 to 30/70 % PLA/PCL blends ratio was found, where the inversion transition of PLA from dispersive medium to dispersive phase where an inversion transition is assumed when the continuous medium of the PLA transforms into a discrete phase. The performed studies made it possible for the first time to carry out a comprehensive analysis of the effect of the system component ratio on the structural and dynamic characteristics of the PLA/PCL film material at the molecular level.

Keywords

polylactide; polycaprolactone; electrospun fibers; EPR correlation time; amorphous phase, crystalline phase

Subject

Chemistry and Materials Science, Biomaterials

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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