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Study on propylene polymerization in the presence of phenolic antioxidant ( I rganox 1076) and characterization of stabilized polymers
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.21402
Subject(s) - polymerization , crystallinity , antioxidant , polymer , catalysis , fourier transform infrared spectroscopy , materials science , nuclear chemistry , crystallization , polymer chemistry , chemistry , organic chemistry , chemical engineering , composite material , engineering
The aim of this study was to investigate different concentrations of Irganox 1076 on Ziegler–Natta catalyst performance during propylene polymerization. Antioxidant masking was conducted by addition of different molar ratio of triethylaluminum (TEAL). Proton nuclear magnetic resonance and Fourier transform infrared spectroscopy spectra confirmed the complete conversion of antioxidant to aluminum aryloxide form. The different concentrations of masked antioxidant with different molar ratio of TEAL were used during polymerization and the catalyst activity was evaluated. Morphology, particle size distribution, melt temperature, crystallization temperature, degree of crystallinity, oxidative induction time, and isotacticity of products in the presence of masked antioxidant were evaluated. Results showed that incomplete masking of OH phenolic antioxidant led to significant catalyst activity reduction. J. VINYL ADDIT. TECHNOL., 21:285–289, 2015. © 2014 Society of Plastics Engineers