Results 61 to 70 of about 317,213 (327)

AC-Calorimetry at High Pressure and Low Temperature

open access: yes, 2003
Recent developments of the AC-calorimetric technique adapted for the needs of high pressure experiments are discussed. A semi-quantitative measurement of the specific heat with a Bridgman-type of pressure cell as well as a diamond anvil cell is possible ...
Wilhelm, Heribert
core   +2 more sources

Non-equilibrium heat capacity of polytetrafluoroethylene at room temperature [PDF]

open access: yes, 2007
Polytetrafluoroethylene can be considered as a model for calorimetric studies of complex systems with thermodynamics transitions at ambient temperature. This polymer exhibits two phase transitions of different nature at 292 K and 303 K.
Bourgeois, O.   +3 more
core   +2 more sources

Evaluating Dielectric Properties for Semicrystalline Thermoplastics to Analyze the Thermal and Rheological Properties in Laser‐Based Powder Bed Fusion of Plastics

open access: yesAdvanced Engineering Materials, EarlyView.
This study aims to establish a link between the dielectric properties of polyamide 12 (PA12) and its thermal and rheological properties using dielectric analysis (DEA). A standardized methodology is introduced to determine melting and crystallization temperatures.
Benedikt Burchard   +2 more
wiley   +1 more source

Classroom experiments with artificial sweeteners: growing single crystals and simple calorimetry

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2022
An easily accessible experimental set-up to grow large single crystals of two sweeteners readily available in supermarkets, erythritol and xylitol, is described.
Johan Wouters, Luc Van Meervelt
doaj   +1 more source

Study on Intumescent Flame Retarded Polystyrene Composites with Improved Flame Retardancy [PDF]

open access: yes, 2010
The flame retardancy and thermal stability of ammonium polyphosphate/tripentaerythritol (APP/TPE) intumescent flame retarded polystyrene composites (PS/IFR) combined with organically-modified layered inorganic materials (montmorillonite clay and ...
Lu, Hongdian, Wilkie, Charles A.
core   +1 more source

Investigation of Iron‐Aluminide‐Like Phase Composition in Complex Concentrated Fe32Cu12Ni11Ti16Al29 Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This work reveals the phase composition and quantitative morphology analysis of precipitation‐hardened Fe32Cu12Ni11Ti16Al29 complex‐concentrated alloy. The precipitates are shown to have a high coherency. Morphology transition between sphere, cuboidal, and elongated morphology is observed. Finally, the overaging behavior is captured using microhardness.
Rostyslav Nizinkovskyi   +4 more
wiley   +1 more source

Toughness of Confined Auxetic Foams

open access: yesAdvanced Engineering Materials, EarlyView.
Auxetic (negative Poisson's ratio) materials offer benefits such as impact mitigation, thermal insulation, vibration damping, and reduced shear strain, although their fracture mechanics are largely unexplored. This study investigates damage initiation and propagation in confined re‐entrant auxetic foams from polyurethane via experimental ...
Adrianos E. F. Athanasiadis   +3 more
wiley   +1 more source

Combustion calorimetry with fluorine: constant pressure flame calorimetry

open access: yesJournal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1960
Instruments and methods have been developed and are described for the measurement of heats of reaction between fluorine and other gaseous materials. Verification of the amount of reaction of hydrogenous materials is possible. The estimated accuracy of measurements is about 0.3 percent. Lack of certainty of the magnitude of corrections to be applied for
G. T. Armstrong, R. S. Jessup
openaire   +2 more sources

Nanoscale Quantum Calorimetry with Electronic Temperature Fluctuations

open access: yes, 2018
Motivated by the recent development of fast and ultra-sensitive thermometry in nanoscale systems, we investigate quantum calorimetric detection of individual heat pulses in the sub-meV energy range.
Brange, F.   +3 more
core   +1 more source

A conceptual approach for noncontact calorimetry in space [PDF]

open access: yes, 1991
A concept is developed and described which allows to measure the heat capacity and the effective thermal conductivity of stable and undercooled liquid metals and alloys in an electromagnetic levitation apparatus.
Fecht, H. J., Johnson, W. L.
core   +1 more source

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