Pyrolysis kinetics and flame retardant enhancement of bio-based polyamide 56/6

IF 3.1 2区化学 Q2 CHEMISTRY, ANALYTICAL Thermochimica Acta Pub Date : 2024-09-21 DOI:10.1016/j.tca.2024.179869

Xiaoqi Zhang , Haoyu Yang , Yaxin Guo , Jie Zhou , Hao Liu , Suqin He , Miaoming Huang , Wanlin Xu , Chengshen Zhu , Wentao Liu

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Abstract

The development of polyamide materials with fire safety is of great importance at this stage. A novel nitrogen-phosphorus bisystem flame retardant (MC) with a multi-branched structure was synthesized and applied to a new bio-based polyamide 56/6 (PA56/6). Notably, at 8 wt% MC content, flame-retardant PA56/6@MC_8% (FRPA56/6@MC_8%) achieved an Limiting Oxygen Index (LOI) of 26.6% and a V-0 rating in UL-94 tests. Cone calorimetry results indicated that FRPA56/6@MC_8% exhibited a 22.9% reduction in total heat release (THR) and a 41.0% decrease in peak heat release rate (PHRR), underscoring the flame retardancy promotion by MC in PA56/6. The study further explored the pyrolysis kinetics and mechanisms of polyamide materials, offering insights crucial for flame-retardant modifications. Overall, the findings present an innovative strategy for enhancing the flame retardant properties of PA56/6, potentially applicable in automotive components and other pertinent fields.

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生物基聚酰胺 56/6 的热解动力学和阻燃性能的提高

现阶段，开发具有防火安全性的聚酰胺材料具有重要意义。研究人员合成了一种具有多分支结构的新型氮磷双体系阻燃剂（MC），并将其应用于新型生物基聚酰胺 56/6（PA56/6）。值得注意的是，在 MC 含量为 8 wt% 时，阻燃 PA56/6@MC8% （FRPA56/6@MC8%）的极限氧指数（LOI）达到 26.6%，在 UL-94 测试中达到 V-0 级。锥形量热仪结果表明，FRPA56/6@MC8% 的总放热量 (THR) 降低了 22.9%，峰值放热率 (PHRR) 降低了 41.0%，突出表明了 MC 在 PA56/6 中的阻燃性能。该研究进一步探讨了聚酰胺材料的热解动力学和机理，为阻燃改性提供了至关重要的见解。总之，研究结果提出了一种增强 PA56/6 阻燃性能的创新策略，可用于汽车部件和其他相关领域。

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来源期刊

Thermochimica Acta 化学-分析化学

CiteScore

6.50

自引率

8.60%

发文量

210

审稿时长

40 days

期刊介绍： Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes