ArticleScientific reports2026
Effect of solid-state polymerization on fiber structure development in melt spinning of mechanical recycled PET.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
2 citing papers in PubMed.
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Authors and funding
4 authors.
Funding
Abstract
This study assessed the feasibility of producing industrial PET filament fibers from mechanically recycled PET (mr-PET) and aimed to establish the optimal solid-state polymerization (SSP) and melt-spinning conditions required for their manufacture. Virgin PET (v-PET) and mr-PET with the same intrinsic viscosity (IV) were selected and subjected to SSP at temperatures of 220, 230, and 240 °C for 6, 12, and 18 h. Among the samples with similar IV (~ 1.1 dL/g), the 230 °C–6 h sample was selected for melt spinning due to its comparable molecular weight(MW) and IV, as well as process efficiency. Melt spinning was performed at 285 °C, and the PET filament fibers were obtained at specified take-up velocities. WAXD analysis showed that crystalline structures formed at a take-up velocity of 4000 m/min in samples before SSP, whereas in samples after SSP, crystallization occurred at 3000 m/min. As the take-up velocity increased, the tenacity of both pre- and post-SSP samples tended to increase. When mr-PET that underwent SSP was spun at 3000 m/min, its tenacity was comparable to that of v-PET under the same conditions. Therefore, industrial PET filament fibers with properties comparable to v-PET can be produced from mr-PET under optimized SSP and melt-spinning conditions.
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