Effect of borax-boric acid and ammonium polyphosphate on flame retardancy of natural fiber polyethylene composites

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dc.creatorRitesh Kumar
dc.creatorJayshree Gunjal
dc.creatorShakti Chauhan
dc.date2022
dc.date.accessioned2026-07-07T04:36:41Z
dc.descriptionWood fiber filled high density polyethylene composites (WPCs) were prepared using twin screw extruder and maleated polyethylene as a coupling agent. Bamboo fibers were initially treated with alkali (NaOH), boric acid - borax (Ba-Bx) and borax (Bx). The treated and untreated fibers were used in combination with ammonium polyphosphate (APP) to investigate their synergistic effects on thermal stability, flame retardancy and mechanical properties. Alkali pretreatment (5 % NaOH) of fibers showed significant improvement in performance of APP by increasing thermal stability in WPCs. The derivative thermogravimetric (DTG) results indicate significance of Ba-Bx in promoting char induction at lower temperatures (340 ºC) and thereby, improved the thermal stability in WPCs. Flammability decreased with addition of flame retardant additives. As compared to pure WPCs, composites containing APP 10 % / Ba-Bx 5 % exhibited maximum reduction in average heat release rate (HRR) by 69 %, peak heat release rate (PHRR) by 59 %, total heat released rate (THR) by 48 % and also increased time to ignition (TTI) by 62 %. However, no significant difference was found among the combinations i.e., APP with or without compounds towards reducing the flammability of WPCs. The strength properties also reduced significantly when boron compounds were added along with APP. In general, APP alone (15 %) is enough for imparting thermal stability and flame retardancy in WPCs.
dc.formatapplication/pdf
dc.identifier0717-3644
dc.identifierhttps://www.redalyc.org/articulo.oa?id=48575019034
dc.identifierhttps://www.redalyc.org/journal/485/48575019034/
dc.identifierhttps://www.redalyc.org/journal/485/48575019034/html/
dc.identifierhttps://www.redalyc.org/journal/485/48575019034/48575019034.epub
dc.identifierhttps://www.redalyc.org/journal/485/48575019034/movil
dc.identifier10.4067/s0718-221x2022000100434
dc.identifier.urihttp://hdl.handle.net/123456789/466773
dc.languageen
dc.publisherUniversidad del Bío Bío
dc.relationhttp://www.redalyc.org/revista.oa?id=485
dc.rightsMaderas. Ciencia y Tecnología
dc.sourceMaderas. Ciencia y Tecnología (Chile) Vol.24
dc.subjectAgrociencias
dc.titleEffect of borax-boric acid and ammonium polyphosphate on flame retardancy of natural fiber polyethylene composites
dc.typeartículo científico

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Maderas. Ciencia y Tecnología - Universidad del Bío Bío