Effect of crystalline structure of polypropylene random copolymers on mechanical properties and thermal degradation kinetics

▸ PP-R consists only of α-crystals. ▸ PP-RCT consists of α- and β-crystals. ▸ PP-RCT presents higher strength at yield and break point than PP-R. ▸ PP-RCT presents better thermostability than PP-R. ▸ The higher activation energy of PP-RCT is attributed to the β-nucleating agent.