Showing papers in "Polymer Degradation and Stability in 2007"

TL;DR: In this article, the PAN fiber is first stretched and simultaneously oxidized in a temperature range of 200-300°C and then carbonized at about 1000°C in inert atmosphere which is usually nitrogen.

TL;DR: In this paper, the fire retardancy mechanisms of aluminium diethylphosphinate in combination with melamine polyphosphate and zinc borate were analyzed in glass-fibre reinforced polyamide 6,6.

TL;DR: In this paper, the thermal degradation mechanism of a novel polyvinyl alcohol/silica (PVA/SiO 2 ) nanocomposite prepared with self-assembly and solution-compounding techniques is presented.

TL;DR: In this article, surface modified TiO 2 nanoparticles were incorporated into polymer matrices to obtain high transparency poly(l -lactic acid)-poly(l-lactic acids-poly( lactic acid) nanocomposite films.

TL;DR: In this article, the recycling behavior of PP/vegetal fiber composites was analyzed using microscopic, mechanical, rheological and thermal tests, and the results showed that mechanical properties are well conserved with reprocessing of PP and vegetal fibre composites.

TL;DR: In this paper, a novel phosphorous-nitrogen structure containing intumescent flame retardant, poly(4,4-diaminodiphenyl methane spirocyclic pentaerythritol bisphosphonate) (PDSPB) was synthesized and characterized Thermal stability and flammability properties of ABS/PDSPP composites were investigated by thermogravimetric analysis (TGA) and cone calorimeter test, respectively.

TL;DR: In this paper, polyurethane networks based on castor oil (CO) as a renewable resource polyol and poly(ethylene glycol) (PEG) with tunable biodegradation rates as potential candidates for biomedical implants and tissue engineering were synthesized through the reaction of epoxy-terminated polyurethsane prepolymers (EPUs) with 1,6-hexamethylene diamine curing agent.

TL;DR: In this paper, wood flour filled high-density polyethylene (HDPE) composites were manufactured through either injection molding or extrusion and weathered in a xenon-arc weathering apparatus.

TL;DR: In this article, the flammability and thermal properties of the nanocomposite based on low density polyethylene (LDPE) and Mg-Al based layered double hydroxide (Mg−Al LDH) are reported in detail.

TL;DR: In this article, the surface free energies of pine and beech wood were investigated before and after heat treatment using the Lifshitz-van der Waals/acid base approach from contact angles measured by the Wilhelmy method.

TL;DR: In this article, a reactive extrusion technology was adopted to synthesize a flame retardant (ER), based on the esterification of melamine phosphate and pentaerythritol.

TL;DR: In this article, the preparation of poly(−)-caprolactone (PCL)/multi-walled carbon nanotube (MWCNT) composites by ultrasonically mixing the PCL and as-fabricated MWCNT in a tetrahydrofuran solution is described.

TL;DR: In this article, the authors used FTIR, WAXD, DTA and TGA techniques to characterize methylcellulose produced from sugar cane bagasse and two samples were synthesized.

TL;DR: In this article, the effect of six organophosphorus compounds, including Pyrovatex CP (PCP), diammonium phosphate (DAP), phosphoric acid (PA), tributyl phosphate (TBP), triallyl phosphate (TPTAP) and trially l phosphoric triamide (TPTs), on the flame retardancy of cotton cellulose was studied.

TL;DR: In this paper, the extent of biofouling and biodegradation were monitored by measuring biological and physicochemical parameters, which indicated hydrophobic surfaces of polypropylene surfaces favour more bio-degradation.

TL;DR: In this article, the degradation of chitosan samples was monitored by gel permeation chromatography (GPC), revealing the existence of a synergetic effect on the degradation.

TL;DR: In this paper, the photo-oxidation and photo-Fries rearrangement were investigated in outdoor exposure conditions and it was shown that photo-fries reaction can proceed through radical intermediates.

TL;DR: In this article, a reactive phosphorus-containing compound, bis-phenoxy (3-hydroxy) phenyl phosphine oxide (BPHPPO), was first successfully synthesized to produce the phosphoruscontaining flame retardant epoxy resin (BP-EP), which was characterized from FTIR, MS, NMR spectra and elemental analyses.

TL;DR: In this paper, a novel silicone and phosphate modified acrylate (DGTH) was synthesized and characterized by 1H NMR and FTIR, and it was found that DGTH could be cured both by UV radiation and moisture mode with FTIR.

TL;DR: In this paper, the authors studied the embrittlement of polyethylene films in air at 80°C and 90°C, and proposed a chain scission mechanism to induce chemicrystallization.

TL;DR: In this paper, the thermal oxidative degradation kinetics of pure PP and the flame-retarded (FR) PP materials with intumescent flame retardant (IFR) master batches in situ prepared in twin-screw extruder were investigated using Kissinger method, Flynn-Wall-Ozawa method and Coats-Redfern method.

TL;DR: Agar films were subjected to natural weathering exposure in a humid tropical climate for 90 days to determine their biodegradation behavior and functionality as discussed by the authors, and the results will aid in further research to determine the potential use of agar as an environmentally friendly solution to the problem of biodegradable composites disposal.

TL;DR: In this paper, the combination of organophillised montmorillonite (MMT), synthetic hydromagnesite and aluminium hydroxide (ATH) as flame retardant system for polyethylene-based materials was studied.

TL;DR: In this article, the authors present results from an experimental study in which polyurethane samples of two hardnesses, 40 and 90 Shore A, have been subjected to immersion in artificial sea water for periods up to two years at temperatures from 50 to 100 °C.

TL;DR: In this paper, the thermal degradation, in inert and in oxidative atmosphere, of natural montmorillonite and synthetic fluorohectorite both exchanged with polar and non-polar organomodifiers was studied using a combined thermogravimetry/Fourier transform infrared and a flash pyrolysis GC-MS system.

TL;DR: All the additive-containing samples exhibit better oxidation resistance compared to the virgin material, indicating stabilizing activity of the α-tocopherol derivatives, and hypotheses on the rearrangements of the additive structure include the formation of quinonoid products.

TL;DR: In this article, a set of Mater-Bi based biodegradable films was developed and tested, following the selective optimisation of some processing parameters of the film manufacturing along with the optimization of the structural low-tunnel system design.

TL;DR: In this article, the properties of polymer blends between common-type polybenzoxazine (PBA-a) and polysiloxane-block-polyimide (SPI) were studied using Dynamic Mechanical Analysis (DMA) and Thermogravimetric Analysis (TGA).

TL;DR: In this article, the effect of newly synthesized phosphorus-containing reactive amine, which can be used both as crosslinking agent in epoxy resins and as a flame retardant, was investigated.

TL;DR: In this paper, a series of polyhedral oligomeric silsesquioxane/epoxy nanocomposites (POSS/EP) containing 0, 5, 10, 15, and 15 wt% content of POSS were prepared.