Thermal degradation poly composite

Kashiwagi T, Grulke E, Hilding J, Harris R, Awad W, Douglas J (2002). Thermal degradation and flammability properties of poly(propylene)/carbon nanotube composites. Macromol. Rapid Commun. 23 761-765. 

Municipal waste plastic is a mixture of polymers, which contains about 3-5% ABS (134). Mixtures similar to the composition of a typical municipal waste, containing high density poly(ethylene), PP, PS and ABS with a brominated flame retardant were thermally degraded at 450°C. 

Wang, Z. Hu, K. Gui, Z. Thermal degradation of flame-retarded polyethylene/magnesium hydrox-ide/poly(ethylene-co-propylene) elastomer composites. Polym. Int. 2003, 52, 1016-1020. 

Biswas and Roy [126] also studied the thermal stability characteristics (Table 16.7) of chemically prepared pyrrole (PY) modified poly-N-vinylcarbazole (NVC) composite P(PY-NVC) and reported the percentage weight losses for PPY, PNVC and P(PY-NVC) during thermal degradation. It was observed that the thermal stability of P(PY-NVC) was intermediate between those of individual components. 50% weight loss was recorded at 400°C in the case of PPY, at 450°C for PNVC and at 425°C for P(PY-NVC) respectively. They inferred that the thermo-oxidative breakdown of aromatic linkages of the polymer matrix occurs in the temperature range of 300-550°C in case of P(PY-NVC)... 

Thermal Stability and Conductivity. Thermal degradation temperature of PMMA, PS, and PVA (poly(vinyl alcohol)) nanocomposites shifts up by 10-100°C. During combustion [179], nanoparticles form a network of char layers that retards the transport of decomposition products. The thermal conductivity of epoxy composites is four times higher than that of the neat epoxy resin with 5 wt% loads. 

Composite conductive fibers based on poly(3,4-ethylene-diox)d hiophene]-polystyrene sulfonic acid (PEDOT-PSS) solution blended with polyacrylonitrile (PAN] were obtained via wet spinning. The influence of draw ratio on the morphology, structure, thermal degradation, electrical conductivity, and mechanical properties of the resulting fibers was investigated. The results revealed that the PEDOT-PSS/PAN composite conductive fibers crystallization, electrical conductivity and mechanical properties were improved with the increase of draw ratio. The thermal stability of the fibers was almost independent of draw ratio, and only decreased slightty with draw ratio. Besides, when the draw ratio was 6, the conductivity of the PEDOT-PSS/PAN fibers was 5.0 S cm, ten times the conductivity when the draw ratio was 2 (Fig 5.10]. ... 

Seo, M. K. and Park, S. 2004. A kinetic study on the thermal degradation of multi-walled carbon nanotubes-reinforced poly(propylene) composites. Macromolecular Materials and Enoineerino 289 368-374. 

Eco-friendly biodegradable polymers and biocomposites are relatively novel materials that can contribute to reduce the dependence on fossil sources. Because of their renewable nature and biodegradability, environmentally benign composite materials with properties comparable to those of some widely used commodities can be produced. Py-GC/MS has developed as a useful tool for the study of thermal degradation of such polymers and composites, and many studies have recently been published for biodegradable polymers, such as polycaprolactone (PCL), polyhydroxyalcanoates (PHAs) and their copolymers,poly(lactic acid) (PLA), and carbohydrates, including starch and cellulose. 

A series of papers on the thermal degradation of the alkali-metal salts of poly(methacrylic acid) and of their copolymers with methyl methacrylate has appeared. The principal decomposition products have been identified and the variation in their yield with polymer composition determined. Similar experiments have been made on the barium salt of poly(methacrylic acid). Copolymer studies have included methyl methacrylate-styrene, " methyl methacrylate-flE-methylstyrene, " methyl methacrylate-ethylene," methyl... 

Thermal degradation of poly(lactic acid) (PLA) and poly(lactic acid)/com starch composites with and without lysine diisocyanate (LDI) were evaluated by thermogravimetric analysis [49]. Thermal slabihty was decreased by addition of com starch and the composites with lysine diisocyanate showed higher thermal degradation temperature than those without LDI. 

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