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This work studies the effect of an N -alkoxy HALS on the thermal decomposition of a brominated phosphate ester fire retardant. We have monitored the fate of the fire retardant in the presence of the N -alkoxy HALS during thermal decomposition using TGA, FTIR, TD–GC–MS, NMR and ESR methods. We...
Photodegradation mechanisms of a model coating/sealant system based upon styrene–butadiene–styrene triblock copolymer have been investigated. The model system was exposed to ultraviolet–visible radiation using an integrating sphere-based exposure chamber at 30 °C and <1% relative humidity....
Polycarbonate/polyhedral oligomeric silsesquioxane hybrids were prepared based on bisphenol A polycarbonate (PC) and trisilanolphenyl-POSS (TPOSS) by the melt blending method. Investigation of transmission electronic microscopy and Fourier transform infrared spectroscopy confirms that the...
A diglycidylether sulfone monomer (sulfone type epoxy monomer, SEP) was prepared from bis(4-hydroxyphenyl) sulfone (SDOL) and epichlorohydrin without any NaOH or KOH as basic catalyst. FT-IR, 1 H NMR, 13 C NMR and mass spectroscopic instruments were utilized to determine the structure of the SEP...
Degradable behaviors of polymer for implantation in body should be evaluated before clinical application. The effect of continuous mechanical load on the degradation progress of poly( d , l -lactic acid) (PDLLA) foam gasket was investigated in detail by specially designed load-providing devices....
Ethylene–propylene–diene monomer (EPDM) containing 5-ethylidene-2-norbornene (ENB) as diene was exposed to an artificial weathering environment produced by a xenon lamp light exposure and weathering equipment for different time periods. The surface chemical changes were detected by Specular...
Different thin fluorocarbon (FC) films were deposited on Si(111) using plasma polymerisation and then exposed to X-ray radiation. Changes in the chemical composition of the deposited fluorocarbon films as a function of irradiation time were investigated in situ using X-ray photoelectron...
Proteinase K was successfully loaded inside ultrafine fibers of poly(ethylene glycol)–poly( l -lactide) (PELA) by emulsion electrospinning. A core/shell fiber structure was formed and verified by a transmission electron microscope. In vitro biodegradation of electrospun PELA membranes...
Polyaniline (PANI) base has been suspended in 9 M potassium hydroxide at 20 °C or 90 °C for various time intervals extending to 4 months. The fraction of acetone-soluble material increased from 1.2 wt.% to 4.5 wt.% after exposure to an alkaline medium for 60 days at 20 °C. Gel-permeation...
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