Fast scanning calorimetry

Fast scanning calorimetry (FSC) is the future method that allows avoiding any crystallization or reorganiza-... 

Multiple Melting Peaks and Fast Scanning Calorimetry 806... 

Figure 1 Different types of differential scanning calorimeters, (a) Three-dimensional cylindrical calorimeter (Tian-Calvet). (b) Three-dimensional calorimeter with power compensation, (c) Two-dimensional plate-like calorimeter, (d) Scheme of a twin-chip sensor (Mettler Toledo Flash 1 DSC ) for fast scanning calorimetry.

For fast scanning calorimetry, it is therefore important to consider that in any scanning calorimeter some thermal resistance exists between the sample and the measuring system. As a consequence, a temperature difference appears across this effective thermal resistance, pth/ because the heat flow rate O has to be transferred across this resistance ... 

Figm 17 Relaxafion map of iPS, PET, and iPP from cooling rate-dependent calorimetric data measured by fast scanning calorimetry on cooling (squares) and DSC (stars). The diagrams correspond to VFTH curves (solid fines) at A=12, -570 K, and T =333,311, and 223 K for... 

No shift in the glass-transition temperature (exceeding the error limits of 3 K) with film thickness is seen in the results shown in Figure 41, similar to the results from fast scanning calorimetry presented by Efremov et and reproduced... 

Differential scanning calorimetry (DSC) is fast, sensitive, simple, and only needs a small amount of a sample, therefore it is widely used to analyze the system. For example, a polyester-based TPU, 892024TPU, made in our lab, was blended with a commercial PVC resin in different ratios. The glass transition temperature (Tg) values of these systems were determined by DSC and the results are shown in Table 1. 

L.M. Oberoi, K.S. Alexander, A.T. Riga, Study of interaction between ibuprofen and nicotinamide using differential scanning calorimetry, spectroscopy, and microscopy and formulation of a fast-acting and possibly better ibuprofen suspension for osteoarthritis patients, J. Pharm. Sci. 94 (2005) 93-101. 

Fig. 6.24. Differential scanning calorimetry measurements of the heat released during equilibration of n-type a-Si H after (a) fast and b) slow cooling (Matsuo et al. 1988).

The presence of a miscibility gap at equilibrium interferes with the requirements for an absolute asymmetric synthesis from racemic (2). On the other hand, fast cooling of samples of racemate from the melt is associated with the formation of a new phase, almost isomorphous to the eutecticum, but with an internal composition of each crystallite being 50(/ ) 50(5 ) (Scheme 5, c). The existence and nature of this phase was confirmed by two independent routes by differential scanning calorimetry (Figures 2 and 4 a) and from product distribution studies. 

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