Supramolecular flame retardants enabled fire-extinguishing polycarbonate with enhanced thermal stability and reduced smoke release

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-12-19 DOI:10.1016/j.cej.2024.158762

Qingyao Gao, Menghe Zhu, Jihang Wang, Jianhao Zhu, Xinliang Liu, Chuanxin Xie, Xilei Chen, Lei Liu, Pingan Song

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Abstract

The creation of mechanically robust, thermostable, and flame-retardant polycarbonate (PC) is highly desirable in the industry. Unfortunately, achieving such a comprehensive performance portfolio remains challenging due to their different governing mechanisms. Most flame retardants provide satisfactory fire retardancy at the expense of other properties. Herein, we rationally design three novel supramolecular flame retardants (PAPZ@Co, PAPZ@La, PAPZ@Fe) containing phosphorus, nitrogen, and transition metal elements based on ionic and metal–ligand coordination interactions. Benefiting from the π-π stacking and ionic interactions, these supramolecular flame retardants show high thermal stability and good compactivity with PC, thus maintaining the good tensile strength of the matrix. Particularly, PAPZ@Fe enhances the thermal stability of PC by improving the initial degradation temperature by 8 °C and char yields by 36.8 % at 800 °C. The addition of 1.5 wt% PAPZ@Fe enables PC to achieve a desirable UL-94 V0 rating and a high limiting oxygen index of 31.6 %, in combination with a 36.3 % decrease in the peak heat release rate. This work offers a facile strategy for creating high-performance PC for practical application in industry.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.