Premium
Effect of prepolymerization on propylene polymerization
Author(s) -
Monji Majid,
Abedi Sadegh,
Pourmahdian Saeed,
Taromi Faramarz Afshar
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29692
Subject(s) - polymer , scanning electron microscope , isothermal process , polymerization , materials science , polymer chemistry , catalysis , morphology (biology) , silane , chemical engineering , copolymer , chemistry , composite material , organic chemistry , physics , genetics , biology , engineering , thermodynamics
Polymerization of propylene was performed using MgCl 2 . EtOH.TiCl 4 .ID.TEA.ED catalyst system in hexane, where internal donor (ID) was an organic diester and external donor (ED) was a silane compound and also triethyl aluminum (TEA) as activator. A new method called isothermal/nonisothermal method (INM), a combination of isothermal and nonisothermal methods, was applied to produce the spherical polymer particles. The effects of the INM method and prepolymerization temperature on the final polymer morphology, M w , and catalyst activity were also investigated. The morphology of the polymers was evaluated through scanning electron microscopy (SEM) images. GPC results were used for molecular weight ( M w ) evaluation. It was found that the polymers had a better morphology when they were prepared using INM method. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009