Topic
Differential scanning calorimetry
About: Differential scanning calorimetry is a research topic. Over the lifetime, 50315 publications have been published within this topic receiving 1152335 citations. The topic is also known as: DSC.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this article, three methods, using the Perkin-Elmer DSC-1 isothermally or as a scanning calorimeter, of obtaining isothermal cure curves in terms of heat of reaction versus time are compared and the merits of each method when applied to fast and slow cure rates are given.
195 citations
••
TL;DR: In this paper, the phase structure of binary blends of poly[(S)-lactide with atactic poly[R, S)-3-hydroxybutyrate (ataPHB) of different molecular weights (M w =9400, 21,000 and 140,000) were investigated by the means of differential scanning calorimetry (DSC) and optical microscopy.
195 citations
••
TL;DR: In this article, optical microscopy, differential scanning calorimetry, and infrared spectroscopy are used to study the high-temperature isothermal crystallization of high-molecular-weight poly(vinylidene fluoride) poly(VVF2).
Abstract: In this study, optical microscopy, differential scanning calorimetry, and infrared spectroscopy are used to study the high‐temperature isothermal crystallization of high‐molecular‐weight poly(vinylidene fluoride) It is shown that there exists a temperature domain in which both the α and β phases of PVF2 can be grown concurrently and in competition with each other to form two distinct populations of spherulites which are characterized by different diameters, band periods, and melting points In addition, a time‐ and temperature‐dependent crystal‐crystal transition from the α phase to the γ form can be induced in this high‐temperature crystallization region to produce spherulites which melt 15–20 ° above the melting point of the original α phase This transformation exhibits nucleation and propagation characteristics which in some regions can compete with the normal growth of the α phase to produce unique ’’wagon‐wheel’’ spherulitic structures
195 citations
••
TL;DR: In this paper, the heat capacities of water and NaCl(aq) were measured from 285 K to a lower temperature of 202 K < T < 236 K, at 0.1 MPa, dependent on composition.
Abstract: The heat capacities of water and NaCl(aq) from 0.05 mol·kg-1 to 6 mol·kg-1 were measured from 285 K to a lower temperature of 202 K < T < 236 K, at 0.1 MPa, dependent on composition. These measurements were performed with a differential scanning calorimeter (DSC). A cooling scan method permitted supercooling of water and aqueous solutions well below their normal freezing points. Calibration methods for the DSC and measurement methods for the heat capacity using cooling scans are described. The uncertainties of temperature and heat-flow calibration coefficient for the DSC were ±0.08 K and ±0.3%, respectively. The heat capacity of dilute NaCl(aq) increases with decreasing temperature below 270 K, qualitatively similar to the effect observed for water. At larger concentrations of NaCl(aq), this behavior reverses and the heat capacity only decreases with decreasing temperature. An equation of state for the NaCl + H2O system was generated on the basis of the present measurements as well as other experimental r...
195 citations
••
TL;DR: In this paper, an equation has been derived that correlates the temperature coefficient of the growth rate with the temperature dependence of the effective activation energy of the overall crystallization rate, which can be measured by differential scanning calorimetry.
Abstract: An equation has been derived that correlates the temperature coefficient of the growth rate with the temperature dependence of the effective activation energy of the overall crystallization rate, which can be measured by differential scanning calorimetry. The dependence is evaluated by using an advanced isoconversional method and is parameterized in terms of the Hoffman-Lauritzen equation. The parameters obtained for the nonisothermal crystallization of the poly(ethylene terephthalate) melt are consistent with the parameters reported for isothermal crystallization.
195 citations