How can this tiny sample > give you specific heat, modulus, expansion coefficient,weight change, transition t e m p e r a t u r e s . . . and more???? Read how Thermal Methods, the newest techniques of material characterization, offer you both quantitative and qualitative data and reproducible results. Thermal Methods are unique techniques for identifying material characteristics. What you do is subject a milligram-size sample of material to precisely c o n t r o l l e d temperature changes. Property changes measured by a specif ic transducer are recorded and can give you a world of information about the material. More specifically, it can identify the material for you, show differences between chemically similar materials, and show thermal or mechanical history of the sample. The thermogram, the record of this response, is like a fingerprint: positive identification.
Thermal Methods can also give you information on the chemical behavior of materials. You can detect and measure polymerization of monomers and prepolymers. You can measure partial curing (B stage) of thermosetting resins. And that's only the beginning. You can study chemical reaction kinetics in detail, such as rates of crystallization or polymerization. You can study physical changes in detail such as sublimation, vaporizat i o n , f u s i o n , crystal-crystal t r a n sitions, and first-order and secondorder transitions (glass transitions). Also, changes in weight, volume, elastic and compressive moduli and
creep phenomena. And the best part of all this is that all these measurements are easy to make, analyses are fast (many taking less than ten minutes) and data are reproducible. Du Pont offers the only complete Thermal Methods Laboratory including capabilities for Differential Thermal Analysis, Differential Scanning Calorimetry, T h e r m o m e c h a n i c a l Analysis and Thermogravimetric Analysis. We have a new bulletin describing the many applications of the Du Pont Thermal Methods Laboratory. For your free copy, write Du Pont, Room 7942, Wilmington, Delaware 19898.
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