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We investigated the molecular orientation, crystallization mechanism, phase structure and transitions of aligned electrospun fibers, including the constrained amorphous phase and its relationship to the mesophase. Aligned poly(lactic acid) (PLA) fibers were successfully electrospun (ES) by adopting a high-speed rotating wheel as the counter electrode. Using thermal analysis and wide angle X-ray scattering...
The nanoscale phase behavior of a semicrystalline polymer is important for mechanical, thermal, optical and other macroscopic properties and can be analyzed well by thermal methods. Using quasi-isothermal (QI) heat capacity measurements, we investigate the formation behavior of the crystalline, mobile amorphous, and rigid amorphous fractions in poly(trimethylene terephthalate), PTT. The crystal and...
We investigate the interaction of the polymer matrix and filler in electrospun nanofibers using advanced thermal analysis methods. In particular, we study the ability of silicon dioxide nanoparticles to affect the phase structure of poly(ethylene terephthalate), PET. SiO 2 nanoparticles (either unmodified or modified with silane) ranging from 0 to 2.0 wt% in PET were electrospun from hexafluoro-2-propanol...
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