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

Jiaxuan Li; Jun Wu; Xianzhe Wei; Qing Yu; Yuxi Han; Jinhong Yu; Zhongwei Wang

doi:10.1021/acsomega.1c05854

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

ACS Omega. 2022 Jan 28;7(5):4224-4233. doi: 10.1021/acsomega.1c05854. eCollection 2022 Feb 8.

Authors

Jiaxuan Li¹, Jun Wu², Xianzhe Wei³, Qing Yu¹, Yuxi Han¹, Jinhong Yu³, Zhongwei Wang¹

Affiliations

¹ College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
² R&D Department, Qingdao Fusilin Chemical Science & Technology Co. Ltd., Qingdao 266000, China.
³ Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China.

Abstract

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).