Rheological measurements temperature effects

In order to investigate the viscoelastic behavior of crosslinked EVA, rheological measurements were made to determine at what temperatures the phase transitions occur and their effect on the dynamic mechanical modulus. The complex dynamic modulus E expression is given by Eq. (6). 

Rheology is perhaps one of the most powerful techniques for paint evaluation during its formulation as well as in its manufacture. Before a paint is manufactured, its appUcation is known and it is essential to control its flow properties for best operation and application. To control the flow properties of the paint, a rheometer must be selected to make flow measurements which permits good interpretation of the flow properties of the paint. This allows the manufacturer to decide whether two batches of the same material or of different materials will have equal flow behavior under all conditions of operational application. The manufacturer could also predict from these flow measurements whether there is any difference in physical properties on paint application. In the preoperational stage, physical effects which occur in manufacturing and storing, such as temperature effects, evaporation, mixing procedures and shelf life must be studied. These physical effects can be correlated to the flow characteristics of the paint formulation. This allows one to achieve a more efficient and better controlled operation in manufacture and application. 

Han CD, Baek DM, Kim JK, Ogawa T, Sakamoto N, Hashimoto T (1995) Effect of volume fraction on the order-disorder transition in low molecular weight polystyrene-Wock-polyisoprene copolymers. 1. Order-disorder transition temperature determined by rheological measurements. Macromolecules 28 5043-5062... 

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