Isothermal differential scanning calorimetry

KNUDSEN J c, ANTANUSE H s, RisBO j and SKIBSTED L H (2002) Induction time and kinetics of crystallization of amorphous lactose, infant formula and whole milk powder as studied by isothermal differential scanning calorimetry, Milchwissenschaft, 57, 543-546. 

Waters, D. N. and J. L. Paddy, "Equations for Isothermal Differential Scanning Calorimetry," Anal. Chem., 60 (1988). 

Isothermal differential scanning calorimetry (DSC) measurements were carried out to investigate the curing kinetics [85]. Conversion vs time curves of DGEBPA-PACP systems prepared with 1 wt % of catalyst and without catalyst at identical curing temperature are overlaid in Fig. 31. 

Isothermal differential scanning calorimetry (DSC) tests were performed on three unsaturated polyester (UPE) samples at three different temperatures (100°C, 110°C, and 120°C). The output for the three DSC tests are presented in the Fig. 2.70. On the graph, label which curve is associated with which test temperature. From the curves in Fig. 2.70 estimate the total heat of reaction, Qt ... 

S.A Shackelford, I.W. Beckmann, .S. Wilkes, Deuterium Isotope Effects In Thermal Decompositbn of Liquid 2,4,6-Trinirotobene AppEcation to Mechanistic Studies Using Isothermal Differential Scanning Calorimetry Analysis, . Org. Chem., 42 (1977) 4201. 

Nucleation from the melt has been studied for palm oil, composed of triglycerides of palmitic and oleic acids, and exhibiting at least three polymorphs (van Putte and Bakker 1987). Nucleation curves (induction time x vs temperature T) of palm oil and palm stearin show discontinuities at 297 and 306 °C respectively, indicating the onset of nucleation, and the demarcation of the occurrence of the polymorphs, as confirmed by isothermal Differential Scanning Calorimetry (DSC) studies (Ng I990a,b). 

The kinetics of curing of a poly(phenylene ether)/epoxy resin system has been investigated by an advanced iso-conversional method. Curing experiments with different PPE/EP ratios were carried out using non-isothermal differential scanning calorimetry. It was shown that the curing mechanism of this system is very complicated [21],... 

Although generally a fast process [25,38,39], it was monitored by isothermal differential scanning calorimetry (DSC) in a few instances. The thermal transition is completed within 1-5 min for polymers Pi [40] but requires from 100 to 1000 min for polymer P6 [41]. The value of the Avrami coefficient in P6 suggests a rod-like mechanism for the growth process. While structures Pi appear to be fairly typical, the extremely slow transition reported for polymer P6 seems to represent an exception, at least in the absence of further studies. Chain structure and molecular mass, however, play an important role in the transition kinetics, contrary to the widely held view, inherited from the literature on MLCs, that nematic ordering is always a fast process. 

The experimental procedure involves initiation of the polymerization by irradiation followed by cutting off the light after a certain time at a degree of conversion chosen, and monitoring the reaction in the dark. As experimental methods, both isothermal differential scanning calorimetry (photocalorimetry, photo-DSC) [2,6, 7, 18-32] and real-time infrared... 

The rate of copolymerization (f) of styrene with BMA was studied by using isothermal differential scanning calorimetry (DSQ. The conversion of monomer as a function of time can be obtained by integration of the DSC diagrams ... 

The first mechanistic application of the condensed phase KDIE approach to the thermochemical decomposition of an energetic material was conducted with liquid 2,4,6—trinitrotoluene (TNT) and its , , —trideuteriomethyl labeled analogue (TNT-da) using isothermal differential scanning calorimetry (IDSC) analysis. This study revemed the first direct experimental evidence that covalent... 

J.W. Beckmann, J.S. Wilkes, R.R. McGuire, "2,4,6—Trinitrotoluene Thermal Decomposition Kinetic Parameters Determined by the Isothermal Differential Scanning Calorimetry Technique", Thermochim. Acta. 19. 111—118 (1977). 

Kinetic experiments with n-butylmethacrylate (n-BMA) have been described in literature in a temperature range of 80-130°C [5,14]. As the extruder temperatures are in the range of 110-130°C, especially the experiments of Ganzeveld and Janssen [5] are relevant for the understanding of the influence of the gel effect on the reaction at higher temperatures. They performed isothermal differential scanning calorimetry (DSC) measurements at temperatures of 110°C, 120°C, and 130°C with n-butylmethacrylate (inhibited) and a combination of two initiators. The inhibitor was not removed from the monomer to imitate the situation in the extruder. The initiators were peroxides with half-life times of 1 hr at 92°C and 132°C and concentrations of 1.2% and 0.5% that were well mixed with the monomer in order to prevent diffusion limitations. 

Graydon, JW, SJ Thorpe, DW Kirk. (1994). Determination of the Avrami exponent for solid state transformations from non-isothermal differential scanning calorimetry. J Non-Cryst Solids 175 31—43. 

Tan CP, Man YBC, Sdamat J, Yusoff MSA. Application of Arrhenius kinetics to evaluate oxidative StabUity in vegetable oUs by isothermal differential scanning calorimetry. J Am Oil Chem Soc 2001 78(11) 1133-1138. 

Tseng et investigated the effects of montmorillonite on the crystallization kinetics of syndiotactic polystyrene (s-PS) with isothermal differential scanning calorimetry analyses. The clay was dispersed into the s-PS matrix via melt... 

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