Statistical copolymers of norbornene (NBE) with cyclopentene (CP) were prepared by ring-opening metathesis polymerization, employing the 1st-generation Grubbs' catalyst, in the presence or absence of triphenylphosphine, PPh₃. The reactivity ratios were estimated using the Finemann-Ross, inverted Finemann-Ross, and Kelen-Tüdos graphical methods, along with the computer program COPOINT, which eva...

Due to the rapid cooling of the slag infiltrated into the mold-strand gap, it is expected that the rate of devitrification of the glass formed plays a key role in determining the proportion of crystalline phases influencing mold heat transfer. In this investigation, a novel procedure to calculate Time-Temperature-Transformation (TTT) curves of mold slags is presented. It is based on the integra...

The 3D metal–organic framework (MOF), MIL-88B, built from the trivalent metal ions and ditopic 1,4-Benzene dicarboxylic acid linker (H2BDC), distinguishes itself other MOFs for its flexibility high thermal stability. MIL-88B was synthesized by a rapid microwave-assisted solvothermal method at power (850 W). iron-based [Fe3.O.Cl.(O2C–C6H4–CO2)3] exposed oxygen iron content of 29% 24%, respective...

The present study reports the results obtained after analysis of thermal stability and decomposition kinetics widely used synthetic derivative estradiol, ethinylestradiol (EE), as a pure active pharmaceutical ingredient. As investigational tools, Fourier transformed infrared spectroscopy (FTIR), analysis, modeling EE were employed. kinetic was realized using three methods, namely Kissinger, Fri...

In this study, the crystallization behavior of a 65GeO2-15PbO-10MgF2-10MgO glass (prepared by the conventional melt quenching technique) has been investigated. The microstructure and crystallization behaviors of this glass were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), non-isothermal differential thermal analysis (DTA) and Fourier transform infrared spectr...

In the present study, a new copolymer containing pyrazole substituted 1,3-diphenyl-1H-pyrazol-5-yl methacrylate (DPMA) and styrene (St) units, [poly(DPMA-co-St)], was synthesized. Thermal degradation kinetics of system investigated in detail with thermogravimetric analysis (TGA) technique. An increase thermal stability from 252.02 °C to 274.89 observed depending on change heating rate (5 °C/min...

The reaction mechanisms during thermal decomposition in As-S systems are complex to describe due the physicochemical characteristics of arsenic and its sulfides. Non-isothermal tests were carried out a NETZSCH DTA/TG analysis equipment, interrupted vertical oven adapted for this purpose; both an inert nitrogen atmosphere. information obtained experimentally was analyzed correlated determine pha...

Amorphous alloy ribbons of (Fe50Ni50)73.5Si13.5B9Nb3Cu1 were fabricated by rapid cooling technique on single copper wheel. After fabrication, the crystalline structure examined X-ray diffraction method. The results show that samples possess a complete amorphous state. crystallization process was studied using differential thermal analyzer (DSC). DSC analysis there are two exothermic peaks corre...

Fe-rich soft magnetic alloys are candidates for applications as sensors and actuators. Spring magnets can be obtained when these added to hard compounds. In this work, two nanocrystalline Fe-Zr-B-Cu produced by mechanical alloying, MA. The increase in boron content favours the reduction of crystalline size. Thermal analysis (by differential scanning calorimetry) shows that, temperature range co...