High-Performance TPE‑S Modified by a Flame-Retardant System Based on Black Phosphorus Nanosheets

Few-layer black phosphorus nanosheets (BPs) combined with melamine cyanurate and poly­(phenylene oxide) were used to prepare a flame-retardant thermoplastic elastomer based on polystyrene (TPE-S) for the first time. Compared with neat TPE-S, BP-modified TPE-S with a phosphorus content of 7.98% (TPE-...

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Bibliographic Details
Published in:ACS omega 2022-02, Vol.7 (5), p.4224-4233
Main Authors: Li, Jiaxuan, Wu, Jun, Wei, Xianzhe, Yu, Qing, Han, Yuxi, Yu, Jinhong, Wang, Zhongwei
Format: Article
Language:English
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Summary:Few-layer black phosphorus nanosheets (BPs) combined with melamine cyanurate and poly­(phenylene oxide) were used to prepare a flame-retardant thermoplastic elastomer based on polystyrene (TPE-S) for the first time. Compared with neat TPE-S, BP-modified TPE-S with a phosphorus content of 7.98% (TPE-S/BP-7.98) passed the UL-94 vertical burning V-0 rating, and the limiting oxygen index value increased to 24.0%. The peak heat release rate (PHRR), total heat release, and the average combustion effective heat of TPE-S/BP-7.98 were decreased by 61.8, 26.0, and 35.3%, respectively. The time to PHRR was increased from 90 s (neat TPE-S) to 170 s. Scanning electron microscopy of frozen fracture sections showed favorable compatibility and dispersibility of BPs in TPE-S. In addition, the introduction of BPs showed the most negligible effect on the mechanical properties of TPE-S compared with other flame retardants (aluminum hypophosphite and red phosphorus).
ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.1c05854