Fabrication of green montmorillonite modified bio-based rigid polyurethane foam with improved flame retardancy and enhanced mechanical properties

IF 5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Polymer Testing Pub Date : 2024-08-01 DOI:10.1016/j.polymertesting.2024.108529

Xu Zhang , Zhaoqian Wang , Jingting Shan , Zhi Wang

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Abstract

A low-carbon and sustainable green rigid polyurethane foam was prepared by compounding montmorillonite (MMT) with homemade barium phytate (BAPA). The flame retardancy, thermal stability and mechanical properties of the modified RPUFs investigated using the limiting oxygen index (LOI) method, cone calorimetry (CONE) and thermogravimetry. The results showed that the BAPA/MMT2 composite containing 2 wt% MMT had the highest LOI (25.1 %), and its peak heat release rate (PHRR) and total heat release (THR) were reduced by 14.33 % and 34.68 %, respectively, compared with that of the BAPA/MMT0 material without added MMT. In addition, the smoke production rate (SPR) and total smoke release (TSR) were reduced by 20.54 % and 30.77 %, respectively. BAPA/MMT2 had good flame retardancy and smoke suppression effect. The mechanical properties of BAPA/MMT2 with 2 wt% MMT were improved. The flame retardant mechanism confirmed that BAPA and MMT synergistically improved the quality of the carbon layer. At the same time, phosphorus-containing compounds (PO·), CO₂ and water vapor were produced, which diluted the combustible gas in the gas phase and inhibit the flames spread. The current results provided a new strategy for the preparation of high-performance RPUFs.

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制造绿色蒙脱土改性生物基硬质聚氨酯泡沫，提高阻燃性和机械性能

通过将蒙脱石（MMT）与自制的植酸钡（BAPA）复配，制备了一种低碳、可持续的绿色硬质聚氨酯泡沫。采用极限氧指数（LOI）法、锥形量热仪（CONE）和热重法研究了改性硬质聚氨酯泡沫的阻燃性、热稳定性和机械性能。结果表明，与不添加 MMT 的 BAPA/MMT0 材料相比，含有 2 wt% MMT 的 BAPA/MMT2 复合材料的 LOI 最高（25.1%），其峰值放热率（PHRR）和总放热率（THR）分别降低了 14.33% 和 34.68%。此外，产烟率（SPR）和总烟雾释放量（TSR）分别降低了 20.54 % 和 30.77 %。BAPA/MMT2 具有良好的阻燃性和抑烟效果。含有 2 wt% MMT 的 BAPA/MMT2 的机械性能得到了改善。阻燃机理证实，BAPA 和 MMT 协同提高了碳层的质量。同时，产生的含磷化合物（PO-）、二氧化碳和水蒸气稀释了气相中的可燃气体，抑制了火焰的蔓延。目前的研究成果为制备高性能 RPUF 提供了一种新策略。

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来源期刊

Polymer Testing 工程技术-材料科学：表征与测试

CiteScore

10.70

自引率

5.90%

发文量

328

审稿时长

44 days

期刊介绍： Polymer Testing focuses on the testing, analysis and characterization of polymer materials, including both synthetic and natural or biobased polymers. Novel testing methods and the testing of novel polymeric materials in bulk, solution and dispersion is covered. In addition, we welcome the submission of the testing of polymeric materials for a wide range of applications and industrial products as well as nanoscale characterization. The scope includes but is not limited to the following main topics: Novel testing methods and Chemical analysis • mechanical, thermal, electrical, chemical, imaging, spectroscopy, scattering and rheology Physical properties and behaviour of novel polymer systems • nanoscale properties, morphology, transport properties Degradation and recycling of polymeric materials when combined with novel testing or characterization methods • degradation, biodegradation, ageing and fire retardancy Modelling and Simulation work will be only considered when it is linked to new or previously published experimental results.