Rheology involves the study of the deformation and flow of matter. The goal is to
establish relationships between stress and deformation for (non-Newtonian) materials
where neither Newton's law nor Hooke's law suffice to explain their mechanical
behaviour. Many materials exhibit a non-Newtonian behaviour and the area is
relevant in many fields of study from industrial to technological applications such as
concrete technology, geology, polymers and composites, plastics processing, paint
flow, hemorheology, cosmetics, adhesives, etc ......
Number of the equipments used in everyday life remarkably increased after the
invention of synthetic polymers, especially of styrene-butadiene rubber in 1930 and of
PVC in 1936, and thanks to fast-developing polymer technologies. Polymers are light,
cheap and ductile inert materials, which have good mechanical and thermal
properties, suitable to use for various purposes and are highly resistant to corrosion.
Thanks to such properties, they play an essential and ubiquitous role in many