TAILIEUCHUNG - Modification of fiber properties through grafting of acrylonitrile to rayon by chemical and radiation methods

Fibrous properties of rayon has been modified through synthesis of graft copolymers of rayon with acrylonitrile (AN) by chemical method using ceric ammonium nitrate (CAN/HNO3) as a redox initiator and gamma radiation mutual method. Percentage of grafting (Pg) was determined as a function of initiator concentration, monomer concentration, irradiation dose, temperature, time of reaction and the amount of water. Maximum percentage of grafting () using CAN/HNO3 was obtained at [CAN] = • 103 mol/L, [HNO3] = • 102 mol/L and [AN] = • 102 mol/L in 20 mL of water at 45 C within 120 min while in case of gamma radiation method, maximum Pg () was obtained at an optimum concentration of AN of • 102 mol/L using 10 mL of water at room temperature with total dose exposure of kGy/h. The grafted fiber was characterized by FTIR, SEM, TGA and XRD studies. Swelling behavior of grafted rayon in different solvents such as water, methanol, ethanol, DMF and acetone was studied and compared with the unmodified rayon. Dyeing behavior of the grafted fiber was also investigated. | Modification of fiber properties through grafting of acrylonitrile to rayon by chemical and radiation methods

• Hoá học
• Thermogravimetric analysis
• Fiber properties through grafting
• Grafting of acrylonitrile
• Radiation methods
• TGA and XRD studies
• Journal of Chemistry
• Hydrazine borane
• Metal chloride
• Nitrogen containing materials
• Environmental advances
• Thermogravimetric analysis of microplastics
• Waste water
• Chemical identification
• Method specific limitations
• Rice husk
• Bio fillers
• Nitrogen atmosphere
• Polypropylene composite
• Journal of Zoology
• Fourier transform infrared spectroscopy
• Peripatoides novaezealandiae group
• Single analysis X ray diffraction
• Supercritical conversion process
• Sewage sludge
• Waste Management
• Data processing
• Variance analysis
• Steam gasification
• Macro thermogravimetric analysis
• Potential feedstock
• Gasification of biomass
• Carbon dioxide
• Chitosan blends
• Polyvinyl alcohol
• UV Vis spectroscopies
• Thermogravimetric analysis (TGA)
• Electrospun fibers
• 4 nitrophthalonitrile
• Ethyl 4 methylbenzimidate
• Aluminum chloride anticancer cells
• Dry dimethylformamide
• Coordination polymer
• Spectral studies
• Biological activity
• Soybean oil
• Flame retardant
• Tris(2 hydroxyethyl) isocyanurate (THEIC)
• Fourier transform infrared (FTIR)
• Polymeric ionic liquid grafted silica
• Heterogeneous catalyst
• FT IR spectroscopy
• Radiation measurements
• Proton irradiation
• Impedance spectros
• Electrical properties
• Proton fluence
• X ray diffraction
• Carbohydrate polymers
• Polyelectrolyte complex
• Bioactive compound
• Pectin solutions
• Scanning electron microscopy
• Activation energy
• Diffusion rate
• Starch granules
• Water desorption
• Non isothermal protocol
• Crystallinity region
• Rice straw
• Sodium hydroxide
• BMC Chemistry
• Cross linked polycation
• Shale oil
• Anti swelling experiments
• Microwave irradiation
• Supported catalyst
• Magnetic nanoparticles
• Schiff base
• Cellulose laurate
• Ionic liquids
• Dimethyl sulfoxide