Constructing a carborane-hybridized cross-linked network endows phenolic resin with excellent structural thermo-oxidative and ablative resistant

IF 6.3 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-03-21 DOI:10.1016/j.polymdegradstab.2025.111335

Chen Qiu, Liwei Yan, Yisen Huang, Ran Xu, Fenglin Wang, Huawei Zou, Yinfu Luo, Mei Liang

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引用次数: 0

Abstract

Phenolic resin (PR) has been widely used in ablative thermal protection systems for aerospace applications, but improving its thermo-oxidative and ablation resistance remains challenging. PR hybrid resin with excellent thermal-oxidative resistance was designed through introducing carborane (CB) into the cross-linked network structure of PR. CB hybrid phenolic resin (CBPR) displayed an impressive heat resistance and carbonization, the initial thermal decomposition temperature (T_{5 %}) and weight residue at 800 °C (R_{800 °C}) of CBPR_0.4 in N₂ were 566.3 °C and 85.45 %, and those were 494.5 °C and 79.74 % in air. It was related to the fact that CB could consume free radicals, inhibit cross-linking network destruction, promote organic-inorganic hybrid structures generation and slow down decomposition rate. Meanwhile, PR hybrid resin possessed outstanding oxyacetylene ablation performance, the linear ablation rate (LAR) and mass ablation rate (MAR) were only 0.0015 mm/s and 0.0375 g/s due to in-situ ceramicization and graphitization during ablation, which were reduced by 98.26 % and 71.88 %. The results of this study would provide some inspirations for the development of high-performance thermally protective materials in the future.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.