Abstract
Polymers which take up 80% of the organic industry are known for their high flammability with the production of heat, corrosive toxic gases, and smoke. The need to improve the fire resistance properties of polymer and natural fibre composites lead to the development of functional novel polyester/ aluminum hydroxide (AH) particles- Banana peduncle fibre (BPF) hybrid composites. The composites were produced by varying the ratio of AH:BPF from 0:0, 2.5:2.5, 5:5, 7.5:7.5 and 10:10wt%. The thermal and fire properties were determined. The incorporated AH played a crucial role in improving the thermal stability of the composites by acting as effective physical barriers against the thermal decomposition in the polymer composite. There was maximum, endothermic peak, shift to higher temperature, as the weight percent addition of AH was increased, which reflected in improved thermal stability of the composites. This work shows that addition of 10wt%AH:10wt%BPF to polyester composite retarded its burning by delaying the ignition time by 22.94%, the end of burning time by 13.15% and reduction of the total heat release rate by 29.68%. Keywords : Aluminum hydroxide (AH); polyester; flame retardancy; banana peduncle fibres (BPF). DOI : 10.7176/CPER/62-07 Publication date: February 29 th 2020
Highlights
Tfinalweight lossIt was observed that about 22% of the weight remained at arround 5000C as the the weight percentage additon of aluminum hydroxide (AH) increased upto 10wt%
Fire is a continuous threat to life and property according to fire statistics, more than 12 million fire breaks out every year in the United States, Europe, Russia, and China and Africa Countries killing about 166,000 people and injuring several hundreds of thousands ( Baljinder et al, 2015; Akash Grisha et al, 2017)
X-ray diffraction results of aluminum hydroxide (AH):BPF and polyester composites were studied, and the results showed that the adoption of AH:BPF in polyester had two primary effects: the reinforcement and the nucleating effect
Summary
It was observed that about 22% of the weight remained at arround 5000C as the the weight percentage additon of AH increased upto 10wt%. The presence of endothemic effects in the sample were the results of three– intermolecular dehydrogenation, vapourization and solid state decomposition of some additives (e.g plasticizer) This conclusion was confirmed by the decreased mass of the polymer . On the analogy of it was assumed that the total processes burning/degradation of the residual polymer backbone (dehydrogeneaton polyester) took place in this temperature interval of (300-5000C), which was different for the individual compostes samples in the last temperature interval the mass loss was minimal. This last step (accompanied by the evolution CO2 only) was due to the degradation of the filler material in the composites. It was established that the AH addition on the polyester samples enhanced the stabilization and increased the temperature of maximal decomposition destruction rate
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