نتایج جستجو برای: cure kinetic dsc
تعداد نتایج: 123770 فیلتر نتایج به سال:
In this paper investigates an energetic imidazolium ionic liquid plasticizer (ILP) effect on the degradation kinetics of nitrocellulose, which is a important component of double based solid propellants. For better comparison and evaluation, diethyl phthalate (DEP) plasticizer, which has a structure similar to ILP, was also evaluated. Heat of combustion analysis was performed to evaluate the en...
A cross-linking method for collagen-based biomaterials was developed using the water-soluble carbodiimide 1-ethyl-3-(3-dimethyl aminopropyl)carbodiimide hydrochloride (EDC). Cross-linking using EDC involves the activation of carboxylic acid groups to give O-acylisourea groups, which form cross-links after reaction with free amine groups. Treatment of dermal sheep collagen (DSC) with EDC (E-DSC)...
In many instances computer forensic practitioners come across digital photographs within an investigation. Examples include law enforcement examining computers for child pornography, intellectual property disputes involving proprietary digital images, or file recovery for individuals who have lost personal photos due to accidental deletion or electronic media corruption. More technical examples...
To answer the question “How does lanthanide doping in iron oxide affect cure kinetics of epoxy-based nanocomposites?”, we synthesized samarium (Sm)-doped Fe3O4 nanoparticles electrochemically and characterized it using Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive X-Ray analysis (EDX), tran...
In this study, the aging and deterioration mechanisms in the plastic bonded explosives (PBXs) and their components as well as standard methods for their evaluating are presented. Also, the techniques developed for the prediction of chemical lifetime and service life of PBXs will be reviewed and analyzed. These methods cite the lifetime prediction methods based on weight/energy loss by thermal a...
The objective of this study was to formulate and evaluate the drug-polymer interaction of mefenamic acid (MA) using two polymers with different characteristics as ethylcellulose (EC) and/or cellulose acetate phthalate (CAP). Microspheres were prepared by the modified emulsion solvent evaporation (MESE). The effect of drug-polymer interaction was studied for each of microspheres. Important param...
Mesoporous TiO2-SiO2 nanocomposite (TS) was synthesized via sol-gel method and Amino-functionalized using 3-(aminopropyl) triethoxysilane. prepared amino-functionalized TiO2-SiO2 (NH2TS) was evaluated for eliminating radioactive Th(IV) ion in comparison with (TS). The prepared nanocomposites were characterized using FT-IR, XRD, DSC-TGA...
Background and purpose: The dissolution of a drug has a major role on its bioavailability. Any change in physico-chemical properties can result in changes in drug release, and furthermore in its bioavailability. Evidence suggest that physicochemical properties of medicinal solids depend on the presence of heat and humidity. In order to overcome such changes, it is necessary to determine the sto...
Abstract Background and purpose: The dissolution of a drug has an important role in its bioavailability. Any change in the physico-chemical properties can result in changes in the drug release, and furthermore in its bioavailability. In order to overcome such changes, it is necessary to determine the storage conditions required for obtaining a desired drug release. Materials and methods: Di...
Differential scanning calorimetry (DSC), temperature programmed desorption mass spectrometry (TPD-MS) and small angle neutron scattering (SANS) were used to investigate CO2 uptake by the Wyodak coal. Adsorption of carbon dioxide on Wyodak coal was studied by DSC. The exotherms evident at low temperatures are associated with the uptake of CO2 suggesting that carbon diox...
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