Molecular fractionation in isotactic polypropylene during isothermal crystallization |
| |
Authors: | C. Feldhüsen W. Wenig |
| |
Affiliation: | Gerhard-Mercator-Universit?t Laboratorium für Angewandte Physik D-47048 Duisburg Germany, DE
|
| |
Abstract: | The nucleation frequency of isotactic polypropylene shows for certain molecular weight distributions during isothermal crystallization a “stepwise” development of the nuclei as a function of time. The resulting curve can be fitted by a superposition of exponential functions assuming a separate nucleation density for each nucleation step. The multimodal nucleation is discussed as a consequence of molecular fractionation effects during crystallization. Received: 23 October 1997 Accepted: 12 May 1998 |
| |
Keywords: | Polypropylene nucleation isothermal crystallization molecular fractionation |
本文献已被 SpringerLink 等数据库收录! |