Effect of self-nucleation on crystallization and melting behavior of polypropylene and its copolymers

✍ Scribed by Y. Feng; X. Jin

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 157 KB
• Volume: 72
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19990620)72:12<1559::aid-app8>3.0.co;2-f

✦ Synopsis

The effect of self-nucleation on the crystallization and melting behavior of isotactic polypropylene (i-PP) and low ethylene content propylene-ethylene copolymers were investigated. Isothermal crystallization kinetics were studied using the Avrami equation and Lauritzen-Hoffman nucleation theory. It was found that self-nucleation can enhance the crystallization. The surface free energy e decreased for the selfnucleated sample. The melting behavior was affected by the preselected temperature, T s , at which the polymer was partially melted.