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Effect of Drawing Conditions on Crystal Structure and Mechanical Properties of Melt-Spun Polylactic Acid Fibers

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Abstract

Polylactic acid (PLA) is a biomass-based, eco-friendly, and biodegradable aliphatic polyester. Compared to aromatic polyesters, PLA is not suitable for applications that require high strength and heat resistance. In this study, the extrusion parameters of the melt-spinning process of PLA, namely, the godet temperature (95 and 100 °C), draw ratio (2.0–4.0), and take-up speed (4000–4400 m/min) were optimized. As the draw ratio and take-up speed of the fiber increased, the tensile strength and melting temperature increased owing to orientation-induced crystallization until necking of the fibers occurred. The properties of the PLA fibers were measured using X-ray diffraction, a universal testing machine, differential scanning calorimetry, and Fourier-transform infrared spectroscopy. The maximum crystallinity achieved in the PLA fiber was 84.76%. The tensile strength of the fiber was increased from 86.25 to 124.06 MPa and the melting temperature was increased from 149.51 to 155.14 °C. Therefore, it is concluded that understanding the correlation between the process parameters and fibers and combining them appropriately facilitates the control of the mechanical and thermal properties of the PLA fiber.

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Data availability

The data that support the fndings of this study are available in https://doi.org/10.1007/s12221-023-00091-1.

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Acknowledgements

This work was supported by the Ministry of Trade, Industry & Energy (MOTIE, Korea) development of professional human resources training project (Grant number P0012770); Textile composite structure virtual engineering platform construction (Grant number N0002602). This work was supported by the Ministry of Science and ICT (MSIT, Korea) development of ultra-high performance aramid copolymer fiber and design of nonwoven intermediate for composite applications (Grant number 2021M3H4A3A01043764).

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Authors and Affiliations

  1. Department of Organic Materials Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea

    Seungchan Noh & Jaseung Koo

  2. Korea Dyeing and Finishing Technology Institute, Daegu, 41706, Republic of Korea

    Wuchang Jung & Seungbum Sim

  3. Korea Textile Development Institute, Daegu, 41842, Republic of Korea

    HyunSik Son

  4. Department of Polymer Science and Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea

    Jae-Hak Choi

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  1. Seungchan Noh
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Correspondence to Jaseung Koo.

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Noh, S., Jung, W., Sim, S. et al. Effect of Drawing Conditions on Crystal Structure and Mechanical Properties of Melt-Spun Polylactic Acid Fibers. Fibers Polym 24, 483–488 (2023). https://doi.org/10.1007/s12221-023-00091-1

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  • DOI: https://doi.org/10.1007/s12221-023-00091-1

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