Method used to determine thermal histories of polymers such as melting points and glass transition points.
a test widely used to characterize waxes, DSC measure the amount of energy consumed under controlled heating and cooling rates. Curves of heat flow versus temperature provide insight into the thermal characteristics of wax, including crystalline transitions such as solid-to-solid, solid-to-liquid, and liquid-to-solid. Common values obtained from the curves include the initial and ending temperatures for heat flow and heat of fusion, measured in joules per gram. Also called Thermographic Analysis (TGA)
Analytical method that independently measures the rate of heat flow to a sample against a reference standard of the same temperature. Data are obtained by monitoring the differential heat flow as a function of temperature. DSC can measure heat capacities, phase transitions, dehydration, and decomposition reactions.
In DSC the sample and a reference material are heated and cooled in a defined manner. DSC provides a rapid method for the determination of the temperature profile of a polymeric material. This includes e.g. measurement of heat capacity, specific heat, melting, crystallisation and glass transition temperatures, heat (enthalpy) of fusion, crystallization, study of thermal stability or reaction kinetics and in certain cases identification of the polymer or polymer mixture.
DSC is used to determine the glass transition temperature and the degree of cure of an FRP laminate by measuring the heat flow into and out of a sample as the material which is heated at a constant heating rate under a nitrogen purged atmosphere. The degree of cure may be determined by repeated heating of a sample beyond the glass transition temperature. If the laminate was undercured, the glass transition temperature will continue to increase.
Determination of the heat flow into or out of a PIM sample. Usually it is applied to lower temperatures where the polymer melts, crystallizes or evaporates.
A technique for measuring the temperature, direction, and magnitude of thermal transitions in a sample material by heating/cooling and comparing the amount of energy required to maintain its rate of temperature increase or decrease with an inert reference material under similar conditions.
Differential scanning calorimetry or DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference are measured as a function of temperature. Both the sample and reference are maintained at very nearly the same temperature throughout the experiment. Generally, the temperature program for a DSC analysis is designed such that the sample holder temperature increases linearly as a function of time.
