Morphology development of tertiary blends of olefin-based elastomers, polypropylene and oil

摘要

The discovery of Olefin Block Copolymers (OBC) brought opportunities to develop novel soft compounds for the consumer durables market. These new soft compounds are primarily blends that include a rigid polymer, a rubber, and an oil. This work was aimed at developing fundamental understanding on morphology development of OBC/PP/Oil blends at two different oil levels. The results showed that mechanical properties are dominated by the development of two phase morphologies at low and high rubber volume fractions. A dynamic mechanical analysis at low strains showed that the storage modulus behavior at high rubber volume fractions could be explained with known composite models.