Recent advances for intumescent polymers
Recent advances for intumescent polymers
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DOI：
10.1002/mame.200400007
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发表时间：
2004-06-25
影响因子：
3.9
通讯作者：
Rochery, M
中科院分区：
文献类型：
--
作者：
Bourbigot, S;Le Bras, M;Rochery, M
本文综述了近年来制备膨胀型体系的方法。对涉及亲密的作用机制进行了描述和评论。使用沸石和有机粘土的协同作用方面也被考虑和讨论。在膨胀机理的基础上对新的策略进行了研究。对成炭聚合物作为添加剂的途径(共混技术)也进行了充分的讨论。这包括用成炭聚合物(聚酰胺和热塑性聚氨酯)取代传统的多元醇(成炭剂)。这一概念的优点是，与传统配方的聚合物相比，可以获得力学性能更好的阻燃(FR)聚合物共混物，并且避免了由于多元醇的水溶性和迁移而造成的问题。“纳米复合材料方法”通过使用纳米结构的成炭聚合物来增强膨胀系统的性能。结果表明，这种通过共混方法和纳米复合材料的膨胀结合提高了阻燃和机械性能，并允许生产许多规格(例如，用于阻燃低压电缆和电线的EVA基材料的设计)。这似乎是设计新型高效膨胀材料的最有前途的方法之一。
This paper reviews recent approaches for making intumescent systems. The mechanisms of action involving intimescent are described and commented on. Synergistic aspects using zeolites and organoclays are also considered and discussed. New strategies are examined on the basis of the mechanism of intumescence. The approach of using char forming polymers as additives (blend technology) is also fully discussed. This consists of substituting classical polyols (char forming agents) with char forming polymers (polyamides and thermoplastic polyurethane). It will be shown that the advantages of this concept are to obtain flame-retarded (FR) polymer blends with improved mechanical properties in comparison with polymers loaded with classical formulations, and the avoidance of problems due to the water solubility of the polyols and their migration. The "nanocomposite approach" enhances the performance of intumescent systems by using a nanostructured char forming polymer. It will be shown that this combination of intumescence via the blending approach and nanocomposites enhances both flame retardancy and mechanical properties and allows many specification to be produced (for example, the design of EVA-based materials for flame retarded low voltage cables and wire). This appears to be one of the most promising ways for designing new efficient intumescent materials.