Dynamic simulation and experimental evaluation of EPDM synthesis with ET(IND)2ZRCL2/MAO catalyst system

✍ Scribed by Mônica Carcuchinski Haag; João Henrique Zimnoch Dos Santos; Jairton Dupont; Argimiro Resende Secchi

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 210 KB
• Volume: 76
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000418)76:3<425::aid-app18>3.0.co;2-9

✦ Synopsis

A mathematical model for the homogeneous terpolymerization of ethylenepropylene-diene (EPDM) in a semibatch reactor using Et(Ind) 2 ZrCl 2 /MAO as a catalyst system was developed and reported herein. In this study, we developed a kinetic model in order to explain the catalyst and EPDM properties such as catalyst activity, weightaverage molecular weight, and terpolymer composition, which were experimentally and theoretically obtained. For this system, a lower E/P feed ratio leads to a lower molecular weight and a broader initial molecular weight distribution, while the increase in diene concentration leads to a decrease in the catalyst activity without broadening the MWD of the resulting polymers. The proposed model accounts for these experimental trends and for some data in the literature.