“…Variations in relative content of comonomers, catalyst type and synthesis conditions allow tuning materials properties, such as mechanical, thermophysical, optical, etc., in a predictable manner and on a wide range. For example, recently synthesized with homogeneous isospecific catalytic system copolymers of propylene with ethylene, 1‐hexene, and 4‐methyl‐1‐pentene3, 4 differ significantly in mechanical characteristics. Depending on the relative content of the comonomers, tensile behavior of these materials3, 4 varied from rigid and quite brittle for the homopolymer to pronounced elastic for the copolymers.…”