Critical Overview of Recent Advances

FIGURE 6.17 Intumescent chars formed under the conditions of a cone calorimeter (a) without and (b) with borosiloxane. (From Ref. 65, copyright 2003, Elsevier, with permission.) 

FIGURE 6.18 Temperature curves as a function of time for an intumescent coating containing different amounts of OLDH. (From Ref. 72, copyright 2005, Elsevier, with permission.) 

Intumescence also has a role in the flame retardancy of textiles7 Recently, Horrocks et al. investigated the inclusion of nanoparticles in combination with intumescent flame retardants in polyamide-6 and polyamide-6,67 They suggest that the incorporation of nanoclay does not necessarily increase the LOI value when evaluated as film samples, but they showed the benefit of using nanoclay in polyamides when combined with APP-based formulations. The efficiency is increased by an average factor of 2. 

From fhe liferafure, we demonsfrafed earlier that nanofillers are synergisfs for inlumescenl formulations. In ihis section we focused on fhe flammabilify of fhe materials—Ihere was no mention of olher properties. Nevertheless, we can expect enhancement in different ways to design multifunctional materials. 

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