Thermal Analysis

Vyazovkin, Sergey

doi:10.1021/ac0605546

Cited by 35 publications

(16 citation statements)

References 176 publications

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“…In particular, Vyazovkin has published detailed review articles on thermal analysis literature. In these reviews, as well as in much of his own work, he provides considerable insight into use of TA methods for investigating the properties of polymer nanocomposites, including limitations [28,29,30]. …”

Section: Introductionmentioning

confidence: 99%

Characterization of Nanocomposites by Thermal Analysis

2012

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In materials research, the development of polymer nanocomposites (PN) is rapidly emerging as a multidisciplinary research field with results that could broaden the applications of polymers to many different industries. PN are polymer matrices (thermoplastics, thermosets or elastomers) that have been reinforced with small quantities of nano-sized particles, preferably characterized by high aspect ratios, such as layered silicates and carbon nanotubes. Thermal analysis (TA) is a useful tool to investigate a wide variety of properties of polymers and it can be also applied to PN in order to gain further insight into their structure. This review illustrates the versatile applications of TA methods in the emerging field of polymer nanomaterial research, presenting some examples of applications of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic mechanical thermal analysis (DMTA) and thermal mechanical analysis (TMA) for the characterization of nanocomposite materials.

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Section: Introductionmentioning

confidence: 99%

Characterization of Nanocomposites by Thermal Analysis

2012

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“…Quantitative measurement of condensed‐phase reaction kinetics is usually performed using conventional thermal analysis techniques1 such as TGA (thermogravimetric analysis) and DSC (differential scanning calorimetry). However, those methods fail in the measurement of fast chemistry processes such as rapid thermal decomposition, ignition and combustion of energetic materials where high heating rates are involved.…”

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confidence: 99%

“…It is known that the high heating rates in those processes are critical and must be attained in order to study rapid condensed phase reactions 2–4. In recent years, many experimental diagnostic methods have been developed to characterize rapid reaction processes 1, 5–12. In particular, T‐Jump/FTIR (Fourier transform infrared) spectroscopy was developed to study the reaction kinetics of condensed‐phase propellants 2, 13.…”

mentioning

confidence: 99%

T‐Jump/time‐of‐flight mass spectrometry for time‐resolved analysis of energetic materials

Zhou

Piekiel

Chowdhury

et al. 2008

Rapid Comm Mass Spectrometry

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We describe a new T-Jump/time-of-flight (TOF) mass spectrometer for the time-resolved analysis of rapid pyrolysis chemistry of solids and liquids, with a focus on energetic materials. The instrument employs a thin wire substrate which can be coated with the material of interest, and can be rapidly heated (10(5) K/s). The T-Jump probe is inserted within the extraction region of a linear TOF mass spectrometer, which enables multiple spectra to be obtained during a single reaction event. By monitoring the electrical characteristics of the heated wire, the temperature could also be obtained and correlated to the mass spectra. As examples, we present time-resolved spectra for the ignition of nitrocellulose and RDX. The fidelity of the instrument is demonstrated in the spectra presented which show the temporal formation and decay of several species in both systems. The simultaneous measurement of temperature enables us to extract the ignition temperature and the characteristic reaction time. The time-resolved mass spectra obtained show that these solid energetic material reactions, under a rapid heating rate, can occur on a time scale of milliseconds or less. While the data sampling rate of 10,000 Hz was used in the present experiments, the instrument is capable of a maximum scanning rate of up to approximately 30 kHz. The capability of high-speed time-resolved measurements offers an additional analytical tool for the characterization of the decomposition, ignition, and combustion of energetic materials.

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“…In nonisothermal kinetic analysis, the reaction rate of thermally stimulated solid‐state reactions is usually described by the following expression [17]: …”

Section: Methodsmentioning

confidence: 99%

Synthesis, characterization, and thermal degradation of novel poly(2‐(5‐bromo benzofuran‐2‐yl)‐2‐oxoethyl methacrylate)

Koca

Kurt

Kırılmış

et al. 2011

Polymer Engineering & Sci

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A novel methacrylate monomer containing benzofuran side group, 2‐(5‐bromo benzofuran‐2‐yl)‐2‐oxoethyl methacrylate (BOEMA), was synthesized from esterification reaction of 2‐bromo‐1‐(5‐bromo benzofuran‐2‐yl) ethanone with sodium methacrylate at 85°C in the presence of 1,4‐dioxane solvent. After characterization with Fourier transform infrared spectrophotometer, nuclear magnetic resonance (1H‐NMR and 13C‐NMR), its homopolymerization was carried out by free radical polymerization at 60°C in the presence of benzoyl peroxide initiator and 1,4‐dioxane solvent. The glass transition temperature (Tg) of the synthesized novel polymer, poly(2‐(5‐bromo benzofuran‐2‐yl)‐2‐oxoethyl methacrylate) [poly(BOEMA)], was determined to be 137°C with differential scanning calorimetry technique. Thermal degradation kinetics of poly(BOEMA) was investigated by thermogravimetric analysis method at different heating rates with 5°C/min intervals between measurements. From dynamic measurements, the analysis of each process mechanism of Coats–Redfern and Van Krevelen methods showed that the most probable model for the decomposition process of poly(BOEMA) homopolymer agrees with the random nucleation, F1 mechanism. The apparent decomposition activation energies of poly(BOEMA) by Kissinger's and Flynn–Wall–Ozawa methods in the studied conversion range were 188.47 and 180.13 kJ/mol, respectively. POLYM. ENG. SCI., 2012. © 2011 Society of Plastics Engineers

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Thermal Analysis

Cited by 35 publications

References 176 publications

Characterization of Nanocomposites by Thermal Analysis

Characterization of Nanocomposites by Thermal Analysis

T‐Jump/time‐of‐flight mass spectrometry for time‐resolved analysis of energetic materials

Synthesis, characterization, and thermal degradation of novel poly(2‐(5‐bromo benzofuran‐2‐yl)‐2‐oxoethyl methacrylate)

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