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Polyaniline (PANI) nanotubes were prepared by the oxidation of aniline in solutions of acetic or succinic acid, and subsequently carbonized in a nitrogen atmosphere during thermogravimetric analysis running up to 830 °C. The nanotubular morphology of PANI was preserved after carbonization. The...
Historic parchment is a macromolecular material, which is complex due to its natural origin, inhomogeneity of the skin structure, unknown environmental history and potential localised degradation. Most research into its stability has so far focussed on thermal and structural methods of analyses....
The layered double hydroxides (LDH) Mn 2 Al-LDH-stearate and Co 2 Al-LDH-stearate were prepared by a surfactant-assisted intercalation of the corresponding precursor LDH-CO 3 forms. These compounds were evaluated as potential photodegradant additives in low density polyethylene films with a...
Natural rubber (NR, cis -1,4-polyisoprene) was reacted in solution with SO 2 at room temperature in different solvents (tetrahydrofuran, CHCl 3 , CH 2 Cl 2 and tetralin). The reaction product consisted of an adduct between NR and SO 2 . The chemical structure of the adduct was studied by FT-IR...
The thermal degradation kinetics of polystyrene/CdS composites were studied by thermogravimetry. The samples were heated in nitrogen, with three different heating rates: 5, 20 and 40 °C min −1 . We calculated kinetic parameters using KAS isoconversion method. The results showed that the...
In this research, we studied the mechanism of bonding a hydroxy-functional organophosphorus oligomer (HFPO) to nylon 6.6 fabric using the formaldehyde derivatives of urea and melamine, including dimethyloldihydroxyethyleneurea (DMDHEU) and trimethylolmelamine (TMM), as the bonding agents. The...
A comparison of different model forms for non-oxidative thermoplastic degradation rate is presented. A physically meaningful model is derived from a three-step radical depolymerization mechanism. A moment-based approximation to the population balance equations is derived and implemented to...
One of the main parameters controlling durability of optical discs such as CD-R is the stability of the dye layer. Ambient light exposure contributes to degradation of the light-sensitive dye used in recordable media. Our study focuses how light irradiation influences the dye layer on a...
The expandable graphite (EG) is well proved to be a good intumescent flame retardant for rigid polyurethane foam (RPUF), however, as it is pulverized into fine particles (pEG) for the purpose of improving the mechanical properties of the foam composite, the flame-retardant properties of...
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