Thermal stability of flexible polyurethane foams obtained from reactive phosphorus-containing polyols dispersed in polyethylene glycol

IF 2.4 3区 化学 Q3 POLYMER SCIENCE
Stanley Olivier Kanemoto, Pierre Christelle Mvondo Onana, Arnaud Maxime Yona Cheumani, Maurice Kor Ndikontar, Madurai Suguna Lakshmi
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Abstract

Flame-retardant and flexibility-enhanced phosphorus-polyurethane foams (P-PUF)s were prepared from phosphorus–hydroxyl precursors and polyethylene glycol (PEG) as polyols. In the first step, three different precursors, such as tris-(5-hydroxypentyl) phosphate (P-Pen-OHs), tris-(4-hydroxybutyl) phosphate (P-But-OHs), and tris-(3-hydroxypropyl) phosphate (P-Pro-OHs) were synthesized and used as flame retardants. In the second step, the precursors were made to react with toluene-2,4-diisocyanate to modify the flexibility and flame retardancy properties of the P-PUF product. The P-PUFs were obtained by a one-shot process system and then analyzed for their thermal stability, flame retardancy, and compressive strength properties. Among all P-PUF samples, P-But-PUF showed the best compressive properties with a Young’s modulus value of 0.167 MPa. The compressive properties of P-PUF are found to be proportional to their relative density. These results show that the chemical structure of the phosphorus–hydroxyl precursor had a slight effect on the compressive properties as well as the porosity of the final materials. All the foams had Tg values in the range of 58–70 ℃ and their thermal degradation in a nitrogen atmosphere started around 100 ℃. From the limiting oxygen index test, P-PUF samples are considered marginally stable materials with a slow-burning behavior that confirms the efficiency of reactive phosphorus-based flame retardants.

Graphic abstract

Abstract Image

由分散在聚乙二醇中的活性含磷多元醇获得的柔性聚氨酯泡沫的热稳定性
以磷羟基前体和聚乙二醇(PEG)为多元醇制备了阻燃性和柔韧性增强型磷聚氨酯泡沫(P-PUF)。第一步,合成了三种不同的前体,如磷酸三(5-羟基戊基)酯(P-Pen-OHs)、磷酸三(4-羟基丁基)酯(P-But-OHs)和磷酸三(3-羟基丙基)酯(P-Pro-OHs),并将其用作阻燃剂。第二步是使前体与甲苯-2,4-二异氰酸酯发生反应,以改变 P-PUF 产品的柔韧性和阻燃性能。P-PUF 通过一次成型工艺系统制得,然后对其热稳定性、阻燃性和抗压强度性能进行了分析。在所有 P-PUF 样品中,P-But-PUF 的抗压性能最好,其杨氏模量值为 0.167 兆帕。研究发现,P-PUF 的抗压性能与其相对密度成正比。这些结果表明,磷羟基前体的化学结构对最终材料的压缩性能和孔隙率有轻微影响。所有泡沫的 Tg 值都在 58-70 ℃ 之间,在氮气环境中的热降解始于 100 ℃ 左右。从极限氧指数测试来看,P-PUF 样品被认为是具有缓慢燃烧行为的边缘稳定材料,这证实了反应性磷基阻燃剂的效率。
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来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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