Soft rubber–plastic blends, especially those based on PP as
the plastic, are quite common thermoplastic elastomer
materials [2]. Compounds of these blends are very popular
materials for soft-touch applications such as grips on tools,
sports goods, automotive and medical, because the properties
of the rubber and the PP phase can be easily tailored into a
single product. Understanding the structure–property relationship
in these materials is vital for making blends with tailored
properties. Studies into these relationships are, however, rather
limited, because visualising the blend morphology in these
systems has turned out to be rather difficult.