Differential scanning calorimeter Thermal analysis

Differential Scanning Calorimeter (DSC) thermograms were obtained on a Perkin Elmer DSC-2 run at 10°C per minutes. Dynamic Mechanical Thermal Analysis (DMTA) spectra were obtained on a Polymer Labs DMTA at a frequency of 1Hz with a temperature range from -150°C to +150°C at a scan rate of 5°C per minute. 

Thermal Analysis - Differential Scanning Calorimetry (DSC) and thermal gravimetric analysis (TGA) were used to characterize the thermal properties of the polymers synthesized. DSC analysis was performed on a Perkin-Elmer Differential Scanning Calorimeter, Model 2C with a thermal analysis data station. Thermal gravimetric analysis (TGA) was carried out on a DuPont thermal gravimeter, Model 951. From the DSC and TGA plots of poly (N-pheny 1-3,4-dimethylene-... 

Thermal Properties. The glass transition temperature (Tg) and the decomposition temperature (Td) were measured with a DuPont 910 Differential Scanning Calorimeter (DSC) calibrated with indium. The standard heating rate for all polymers was 10 °C/min. Thermogravimetric analysis (TGA) was performed on a DuPont 951 Thermogravimetric Analyzer at a heating rate of 20 °C/min. 

ARC = Accelerating Rate Calorimeter (Columbia Scientific Instrument Corp.) DSC = Differential Scanning Calorimeter DTA = Differential Thermal Analysis RC1 = Reactor Calorimeter (Mettler-Toledo Inc.) RSST = Reactive System Screening Tool (Fauske and Associates) VSP = Vent Size Package (Fauske and Associates) ... 

Figure 2.6C shows the temperature difference between reference and sample as recorded by differential thermal analysis (DTA). Note also the similar differential scanning calorimeter (DSC) curve later in Figure 2.13. 

E. S. Watson, M. J. O Neil, J. Justin,N. Brenner.X Differential Scanning Calorimeter for Quantitative Differential Thermal Analysis. Anal. Chem. 1964, 36, 1233-1238. 

Dough Moulding Compound Dynamic Mechanical Thermal Analysis Direct Resin Injection and Venting Differential Scanning Calorimeter Differential Thermal Analysis Elongation at Break... 

The glass transition (Ta) and melting (Tm) temperature of the pure component polymers and their blends were determined on a Perkin-Elmer (DSC-4) differential scanning calorimeter and Thermal Analysis Data Station (TADS). All materials were analyzed at a heating and cooling rate of 20°C min-1 under a purge of dry nitrogen. Dynamic mechanical properties were determined with a Polymer Laboratories, Inc. dynamic mechanical thermal analyzer interfaced to a Hewlett-Packard microcomputer. The... 

Watson, E. S., O Neill, M. J., Justin, J. and Brenner, N. 1964. A differential scanning calorimeter for quantitative differential thermal analysis. Anal. Chem. 36, 1233— 1237. 

The reactivity value is obtained by using the peak temperature of the lowest differential thermal analysis (DTA) or differential scanning calorimeter (DSC) exotherm value as shown in column 2 of Table VI. Alternatively, it can be obtained from a qualitative description of the instability (or... 

Figure 1. The Ferkin-Elmer laboratory for thermal analysis. From left to right the DSC-1B differential scanning calorimeter with evolved gas analyzer, the TGS-1 thermobalance (top to bottom), the recorder chart control, model UU-1 temperature programmer control, and model TMS-1 control unit. At right is the model TMS-1 thermomechanical analyzer.

Differential Scanning Calorimetry (DSC) Studies. Hairless mouse abdomen stratum corneum, extracted lipids and protein residues were studied with a Perkin Elmer 4 differential scanning calorimeter (DSC) equipped with a thermal analysis data system (TADS). Scanning rates were 10°C per minute over the temperature region -10 to 237°C. Stratum corneum, extracted lipid and protein residue samples obtained from the abdomen of the hairless mice (average 10 mg/sample) were studied in the desiccated state following evaporation of any residue water or solvents by vacuum drying at 10 4 Torr. 

Isothermal crystallization of the oil or fat was monitored by a Perkin Elmer DSC 7 differential scanning calorimeter. Sample sizes range from 5 to 10 mg. The oil sample is heated to a temperature of 80°C at a heating rate of 5°C/min from ambient and held at that temperature for at least 10 min in order to totally erase all past crystallization memories. The sample was then cooled at a rate of 5°C/min until the desired crystallization temperature had been reached. The sample temperature was then maintained at this crystallization temperature for 2 h to monitor the complete crystallization behavior of the sample. Partial areas under the thermal curve were determined by means of the Perkin Elmer Pyris partial area analysis software. 

The aging and combustion kinetics of coke deposited on an HZSM-5 zeolite-based catalyst in the MTG process have been studied. The kinetic study of coke combustion in air was carried out at 500-550°C in a differential scanning calorimeter, by following the evolution of the combustion products with on-line FTIR analysis. The results provide evidence for limitations on coke reactivity that can be attributed to the combined effects of several circumstances (e.g. bad oxygen-coke contact and heterogeneous distribution of coke within the zeolite crystal). The need is demonstrated for a thermal aging treatment which equilibrates reproducibly the coke prior to combustion. The aging of coke is also limited by a peculiar coke deposit in the microporous stmcture of the zeolite. 

For thermal analysis, shoot and root meristems were analyzed using a differential scanning calorimeter (DSC) Mettler TA 4000. Samples were rapidly cooled to — 100°C and then warmed in the DSC from —100 to 100°C at 10°C min . The data were analyzed using TCII TA Processor and Graph Ware TA 72 software. The ratio of unfrozen water was calculated from the... 

The melting behavior and determination of crystalline content were studied with a Perkin-Elmer DSC-1 differential scanning calorimeter. The heating rate was 8 C/min, the sample size, 12.0 mg for LDPE and 3.0 mg for HDPE, and n-C H-p. The runs were performed in a nitrogen atmosphere. Before analysis all samples were given the same thermal treatment by heating to 150 C and cooling down to room temperature in a controlled manner. 

Electrical resistivity measurement adopted conventional four probes method. Seebeck coefficient was measured by the standard DC method. Thermal conductivity k was calculated from density, specific heat, and thermal diffiisivity. Specific heat measurement was carried out by use of a differential scanning calorimeter (DSC model 8230, Rigaku, Japan) compared with a standard material of a -AI2O3. The values of thermal diffiisivity obtained from a differential phase analysis of photo-pyroelectric signal (AL- A 0 analysis) [9]. All measiu ements were done at room temperature. 

Thermal analysis of polymers was performed on DuPont Model 910 Differential Scanning Calorimeter and a Perkin Elmer Model TQS-2 Thermal Gravimetric Analyzer using a heating rate of 10°C/min. Both systems were interfaced to an Omnitherm Data Station for experiment control, and data acquisition and processing. 

The aim here is simply to present an overview of the various features on offer. The range of instruments extends from differential scanning calorimeters in a suitcase for on-site use to spatially resolved micro-thermal analysis equipment for samples as minute as 2 x 2 fim. Between these rather extreme examples there is a wide choice of commercial DTA and DSC equipment which allows samples to be studied at temperatures ranging from — 150°C to about 1600°C. For higher temperature measurements (above 1600°C) the equipment becomes increasingly more specialised. The detailed specification of equipment is often difficult (sometimes impossible ) to decipher - there appears to be no common practice between manufacturers. Information can best be obtained by raising questions directly with the manufacturers. Even so, hands-on experience is to be recommended when choosing equipment. 

E 1356 (1998) Test method for glass transition temperatures by differential scanning calorimeter or differential thermal analysis... 

DMTA dynamic mechanical thermal analysis DSC differential scanning calorimeter... 

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