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Superior flame retardant and cost-effective aromatic polyoxydiazole fibers enabled by 2,6-Naphthalenedicarboxylic acid

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Abstract

Poly(1,3,4-oxadiazole) (POD) fibers are one of high-performance heat-resistant organic fiber candidates with relatively low cost, while the poor flame retardancy heavily limits their applications. In this work, 2,6-naphthalene dicarboxylic acid (NDA) was performed as a non-halogenated monomer modifier to improve the flame retardancy of POD fibers. The NDA-modified POD copolymers were firstly obtained by tuning the concentrations of NDA, which were then wet-spun to prepare the POD fibers. The naphthalene ring was introduced into the main chain and successfully sulfonated, and the crystallinity of fibers decreased with the additional NDA. Under the drying condition, the limited oxygen index of the modified sample is up to 43%. The results showed that the structure of the burning residue became loose after the introduction of NDA. It has been considered that SO2 produced by combustion could be the main factor to enhance their flame retardant performance via a real-time analysis of combustion gas-phase products. Overall, the proposed NDA modified POD fibers can be served as a cost-effective, superior flame retardant, and heat-resistant material in a broad filed (i.e., electrical insulation, dielectric heat resistant materials).

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Acknowledgements

This work was financially supported by the State Key Laboratory of Polymer Materials Engineering (Grant No.: sklpme2022-2-04). The authors gratefully acknowledge the State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, and the Analytical &Testing Centre of Sichuan University.

Funding

This study was supporting by sklpme2022-2-04.

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Authors and Affiliations

  1. College of Polymer Science and Engineering, Sichuan University, Chengdu, China

    Yulin Zhou, Wentao Li, Shuheng Liang, Qibao Xie & Mengjin Jiang

  2. State Key Laboratory of Polymer Materials Engineering, Chengdu, China

    Yulin Zhou, Wentao Li, Shuheng Liang, Qibao Xie & Mengjin Jiang

  3. Chemical Sciences Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA

    Jiadeng Zhu

  4. Smart Devices and Printed Electronics Foundry, Brewer Science Inc., MO, 65806, Springfield, USA

    Jiadeng Zhu

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  1. Yulin Zhou
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Contributions

Yulin Zhou: Formal analysis, Investigation, Data Curation, Writing - Original Draft, Visualization. Wentao Li: Validation, Supervision. Jiadeng Zhu: Writing - Review & Editing. Shuheng Liang: Formal analysis, Data Curation. Qibao Xie: Investigation, Formal analysis. Mengjin Jiang: Conceptualization, Funding acquisition, Project administration, Writing - Review & Editing.

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Correspondence to Mengjin Jiang.

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Zhou, Y., Li, W., Zhu, J. et al. Superior flame retardant and cost-effective aromatic polyoxydiazole fibers enabled by 2,6-Naphthalenedicarboxylic acid. J Polym Res 29, 440 (2022). https://doi.org/10.1007/s10965-022-03285-y

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