Fire retardancy and environmental assessment of rubbery blends of recycled polymers

Abstract

Abstract. Flame retarded thermoplastic polymer compounds were prepared containing recycled rubber tyres, low density polyethylene, ethylene vinyl acetate copolymer and an intumescent additive system consisting of waste polyurethane foam and ammonium polyphosphate. The effect of the additives on the combustion properties was characterised by Limiting Oxygen Index, UL 94 and mass loss calorimetric measurements. The environmental impact was estimated by determining the gas components of CO2 and CO evolving from the compounds during the burning process using a gas analyser system constructed by coupling an FTIR unit to a mass loss calorimeter. The new material forms a thermoplastic rubber of excellent processability making it suitable for application in construction industry.

Mechanical properties of recycled LDPE/EVA/ground tyre rubber blends: Effects of EVA content and postirradiation

“…In our previous work, LDPE/GTR blends (with various GTR and EVA contents) were investigated 20. The results indicated that the LDPE is a good choice for the matrix and EVA is suitable to create good interfacial bonding to both LDPE25 and GTR 7. In addition, EVA has rubber‐like properties.…”

Upgrading of recycled polypropylene by preparing flame retarded layered composite

“…As reinforcing material in the core of the layered structure and in the mixed polyolefin composite chopped glass fibre (GF) (DS 2200-13P) 3B -Fibreglass Company (Battice, Belgium) ( Table 1) . This intumescent flame retardant system was successfully applied in polyolefin matrix in our previous work [9]. The APP is the phosphorous containing flame retardant additive which forms intumescent char with application of recycled PUR as a carbon source.…”

“…The application of polymer waste as matrix of composites is both ecologic and economic solution providing driving force to reuse the plastic waste in a competitive form. Matko and his co-workers [9] have developed a method for rendering pure polypropylene flame retardant with additives consisting of mainly recycled materials, which reduce considerably the material costs. Strongly reduced heat release rate and high flame retardancy classification was achieved with application of recycled ground tires, and recycled polyurethane in PP, at the expense of the deteriorated mechanical properties.…”

Olefin–maleic-anhydride copolymer based additives: A novel approach for compatibilizing blends of waste polyethylene and crumb rubber

“…Both polyethylene and polypropylene was combined with cross-linked rubber but after several studies on the proper compatibilizing additive for increasing the interfacial adhesion, PE was chosen as the matrix in their products. Matkó et al (2008) and Bodzay et al (2012) made fire retardant composites from recycled plastics. Raw material was low density polyethylene (LDPE), ethylene-vinyl-acetate (EVA) and recycled rubber (RUB).…”