Influence of phosphorous‐based flame retardants on the mechanical and thermal properties of recycled PC/ABS copolymer blends

Abstract

The effects of three commercial aryl phosphate flame retardants (FRs; bisphenol A bis(diphenyl diphosphate) [BDP], triphenyl phosphate (TPP), and a proprietary oligomeric phosphate ester (OPE)) and a compatibilizer (methacrylate-butadiene-styrene copolymer [MBS]) on the thermal and mechanical properties of FR-recycled PC/acrylonitrile-butadiene-styrene copolymer (r-PC/r-ABS) blends are investigated. The addition of FRs to r-PC/r-ABS blends increases the storage, tensile, and flexural moduli, indicating a reinforcing effect. However, at elevated temperatures, FRs reduce the glass transition temperature and act as plasticizers. The thermal stability of r-PC/r-ABS/FR blends at 10% mass loss increases in the following order: r-PC/r-ABS/TPP < r-PC/r-ABS/BDP < r-PC/r-ABS/OPE < r-PC/r-ABS/OPE/MBS. Kinetics of thermal decomposition of the FR r-PC/r-ABS blends is studied calculating the thermal decomposition activation energies by the Flynn-Wall-Ozawa method. Scanning electron microscopy shows that r-PC/r-ABS/OPE blend is only partly miscible, while homogeneous structure is formed in the r-PC/r-ABS/OPE/MBS blend, which is supported by its good mechanical and thermal properties.

Reinforced mechanical properties and heat resistance of recycled acrylonitrile‐butadiene‐styrene/anhydrous zinc chloride coordination composites

“…[3][4][5][6] However, a large amount of waste ABS are burned and buried to landfill every year, causing serious environmental and economic crisis. [7][8][9] In order to relieve the pressure on the environment and simultaneously save petroleum resources, recycling of waste ABS has been wildly employed as an effective solution. [10,11] However, physical and chemical effects, such as heat, [12] light, oxygen, ozone, as well as the mechanical and thermal cycles [13] during the service period and recycling process will change the chemical structure of ABS, leading to degradation of mechanical properties and thermal stability compared with virgin ABS.…”

Preparation and mechanism study of intrinsic hard segment flame‐retardant polyurethane foam

“…The selection of suitable flame retardants is extremely important for enhancing the flame retardancy of materials. For example, some researchers have adopted additive flame retardants, such as halogenated compounds, 16 graphite, 17–19 phosphorus nitrogen compounds and so forth 18,20,21 . Furthermore, inorganic particles such as nanoclay, 22 nano‐SiO 2 , 23 and carbon nanotubes 24 are served as synergists to improve the flame retardancy as a result of synergism between it and additive flame retardants.…”

“…For example, some researchers have adopted additive flame retardants, such as halogenated compounds, 16 graphite, [17][18][19] phosphorus nitrogen compounds and so forth. 18,20,21 Furthermore, inorganic particles such as nanoclay, 22 nano-SiO 2 , 23 and carbon nanotubes 24 are served as synergists to improve the flame retardancy as a result of synergism between it and additive flame retardants. Although the solid additive flame retardants can endow PUF with flame retardancy, they often bring about some problems, such as high viscosity and poor compatibility.…”