Thermo‐oxidative stability study of polypropylene composites by using cone calorimetry and thermogravimetry

Abstract

The flammability of polypropylene (PP) and recycled PP composite systems was thoroughly investigated by using cone calorimetry and thermogravimetry techniques in order to quantify the effect of brominated and chlorinated fire‐retardant systems. In this study, the efficiency of the fire‐retarding systems was defined from the relation between the amount of fire retardants and the characteristic quantities in cone calorimetry (M‐HRR, THR, and M‐EHC) and the limited oxygen index. The brominated fire retardants showed fire‐retarding capability superior to that of the chlorinated systems, and the recycled polymer was thermo‐oxidatively stabler than the pristine PP systems seemingly because of the fillers and blended polymers. Comparing the degradation behaviors of the composite systems in nitrogen and air environments, the halogen compounds retarded the decomposition rates in both cases, deactivating the reactive radicals of the polymer and restricting the flammable gases from being diffused into the unreacted polymer. Overall, the optimal amounts of fire retardants in different polymeric systems could be evaluated and correlated with several fire indicators in a relatively simple manner.

The influence of an N-alkoxy HALS on the decomposition of a brominated fire retardant in polypropylene

“…It is used extensively in many household items, automotive, electrical and building components and outdoor furniture [1]. The broadening of its performance properties to encompass outdoor exposure has arisen by the inclusion of a variety of additives such as fire retardants to enhance its fire performance and light stabilisers to improve its UV and thermal stabilities.…”

Thermal degradation of epoxy resin reinforced with polypropylene fibers

“…1 Because of these properties, PP and its composites have been used in many applications, such as automobiles, electrical and electronic applications, furniture, construction and architecture, interiors, and insulation. 2 Most of the polymers are generally subjected to a degradation of the mechanical and physical properties with an increase in the temperature. Fundamental information regarding the thermal stability of the composite materials to be processed is obtained from thermogravimetric analysis (TGA) and differential scanning calorimetry.…”

Fire performance of wood (Pinus radiata) treated with fire retardants and a wood preservative

“…These polymeric fire retardants included tribromoneopentyl alcohol [26,27], phosphoric acid 3-(diphenoxy-phosphoryloxy)-phenyl ester diphenyl ester [28][29][30], chlorinated paraffin with 65% chlorine content [31][32][33][34] and tetrabromobisphenol A bis (2,3-dibromopropyl ether) [35,36], which is also known to possess biocide functionality [37].…”