The preparation of ammonium polyphosphate@ nickel/cobalt-layered double hydroxide and its application as flame retardant in thermoplastic polyurethane

IF 6.3 2区化学 Q1 POLYMER SCIENCE Polymer Degradation and Stability Pub Date : 2024-09-19 DOI:10.1016/j.polymdegradstab.2024.111013

Xiao-Hui Shi , Huan Luo , Cheng-Yue Jing , Hong Shi , De-Yi Wang

引用次数: 0

Abstract

Inspired by the significant synergistic effect of transition metals and ammonium polyphosphate (APP) on flame reatrdancy, a nickel/cobalt-layered double hydroxide derived from a selected zeolitic imidazolate framework-67 (APP@NiCo) was constructed onto the surface of APP to enhance the fire safety of thermoplastic polyurethane (TPU). The results demonstrated that TPU containing 6 wt% APP@NiCo exhibited a LOI value of 27.7 % and achieved UL-94 V-0 rating. Furthermore, there was a significant reduction in the peak heat release rate, heat release rate, and total smoke production by 72.8 %, 37.5 % and 56.9 %, respectively. The remarkable improvement in flame retardancy was contributed to the highly synergistic charring catalysis of APP and dual transition metals cobalt and nickel, which effectively promoted the formation of robust char layers during TPU combustion for enhancing fire safety.

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聚磷酸铵@镍/钴层状双氢氧化物的制备及其在热塑性聚氨酯中作为阻燃剂的应用

受过渡金属和聚磷酸铵（APP）对阻燃性显著协同作用的启发，在 APP 表面构建了一种由精选沸石咪唑酸框架-67 衍生的镍/钴层双氢氧化物（APP@NiCo），以提高热塑性聚氨酯（TPU）的防火安全性。结果表明，含有 6 wt% APP@NiCo 的热塑性聚氨酯的 LOI 值为 27.7%，达到了 UL-94 V-0 等级。此外，峰值热释放率、热释放率和总产烟量分别大幅降低了 72.8%、37.5% 和 56.9%。阻燃性能的显著提高得益于 APP 与双过渡金属钴和镍的高度协同炭化催化作用，这种催化作用可有效促进热塑性聚氨酯燃烧过程中形成坚固的炭层，从而提高防火安全性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.