Cyano-containing polyphosphazene based insulations with unique ablative and adhesive performances

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-04-01 DOI:10.1016/j.cej.2025.162065

Yi Sun , Yihan Zhang , Guanghui Cui , Yang Zheng , Yang Zhou , Husitu Lin , Yongkang Wang , Jianhua Li , Zhanpeng Wu

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引用次数: 0

Abstract

The ablative resistance and bonding adhesion strength are two key factors for the insulation layer in a solid rocket motor. In this study, a novel thermal insulation material, poly(p-cyanophenoxy/aryloxy)phosphazene (PCAP), with elevated adhesion strength and remarkable ablative resistance was prepared by incorporating polar cyano groups into conventional poly(diaryloxy)phosphazene (PDPP). The high polarity of cyano groups contributes to a maximum adhesive strength of 5.9 MPa on metal surfaces, which is 70% higher than the conventional PDPP. The material also exhibits impressive ablative resistance with the linear ablation rate of 0.109 mm/s and a mass ablation rate as low as 0.05 g/s. The surface and cross-sectional analysis of the charred layer in PCAP composites reveals a densification trend with pore density decreasing from the surface to the interior, which provides the structural integrity and superior thermal protection during ablation. The novel polyphosphazene material developed significantly enhances the adhesion strength to metal substrates while retaining the inherent excellent ablation resistance of polyphosphazene itself, make it an excellent candidate for thermal insulation for high-demand aerospace applications.

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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.