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Effect of phenolic, phosphite, lactone, and their mixtures of antioxidants on Z iegler– N atta catalyst performance during propylene polymerization
Author(s) -
Ranji A.,
Arabi H.,
Jahani Y.
Publication year - 2015
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.21394
Subject(s) - catalysis , polymerization , antioxidant , chemistry , polymer , organic chemistry , natta , materials science
This study investigated the use of antioxidants and mixtures of these antioxidants during slurry propylene polymerization using the Ziegler–Natta catalyst. Antioxidant masking using triethylaluminium is the key to reducing the destructive effect of antioxidants containing OH phenolic groups on Ziegler–Natta catalyst performance. According to the synergistic properties, antioxidant mixtures with different ratios were evaluated for their masking conditions and amounts of antioxidant added. Polymer characteristics such as catalyst activity, isotacticity, oxidative induction time, and particle‐size distribution of the products in the presence of different amounts of antioxidants were evaluated. The results showed that phosphite and lactone antioxidants have more effect on catalyst performance during polymerization than phenolic antioxidants. J. VINYL ADDIT. TECHNOL., 21:299–304, 2015. © 2014 Society of Plastics Engineers