2019
DOI: 10.1002/app.47593
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Fire retardance and smoke suppression of polypropylene with a macromolecular intumescent flame retardant containing caged bicyclic phosphate and piperazine

Abstract: A macromolecular intumescent flame retardant (FR) named PPPAP was designed and synthesized with phosphorus chloride (the acid source), 2,6,7‐trioxa‐l‐phosphabicyclo[2.2.2]‐octane‐4‐methanol (the charring agent), and anhydrous piperazine (the blowing agent). Then, it was used to prepare an intumescent flame‐retardant polypropylene (FR‐PP). The thermal stability, flame retardancy, and fire performance of the FR‐PPs were investigated. The results show that the initial decomposition temperature and char residue at… Show more

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Cited by 13 publications
(11 citation statements)
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“…A charring-foaming agent (CFA) plays the role of charring agent. During combustion, the acid source's reaction can promote the dehydration and carbonization of the charring agent to form a char layer [11]. The structure of CFA is shown in Figure 1.…”
Section: Introductionmentioning
confidence: 99%
“…A charring-foaming agent (CFA) plays the role of charring agent. During combustion, the acid source's reaction can promote the dehydration and carbonization of the charring agent to form a char layer [11]. The structure of CFA is shown in Figure 1.…”
Section: Introductionmentioning
confidence: 99%
“…In gas phase, nonflammable gases such as NH 3 , CO 2 , and H 2 O generated from the decomposition of APP and PCA can dilute flammable gases and oxygen. Thus, combustion process is effectively suppressed …”
Section: Resultsmentioning
confidence: 99%
“…When acid source is heated, it is decomposed to produce a dehydrating agent, which will catalyze carbonizing agent to form carbon layer, while foaming agent releases large amounts of incombustible gases to promote the intumescence of char residue. Finally, intumescent char layer can cover entirely on the surface of materials, leading to the inhibition of further decomposition of underlying polymer matrix and suppression of heat and oxygen transfer . Although some progresses have been made in previous work, smoke release behavior of IFR samples has relatively rarely investigated.…”
Section: Introductionmentioning
confidence: 99%
“…On the basis of previously reported works, the piperazine derivatives in IFR system presented outstanding charring ability and facilitated the formation of cross‐linking and barrier char layer in condensed phase. Thus, our previous study successfully synthesized flame‐retardant polyphosphoric acid piperazine (PPAP) and the PPAP exerted excellent flame retardancy for epoxy resins in condensed phase .…”
Section: Introductionmentioning
confidence: 88%