Polymerization of propene over the MgCl2‐supported tris(acetylacetonato) chromium catalyst combined with diethylaluminiumchloride
نویسندگان
چکیده
منابع مشابه
Propene-cycloolefin polymerization
Highly active metallocenes and other single site catalysts have opened up the possibility of polymerizing cycloolefins such as norbornene (N) or of copolymerizing them with ethene (E) or propene (P). The polymers obtained show exciting structures and properties. E-N copolymers are industrially produced materials, with variable and high glass transitions depending on the wide range of their micr...
متن کاملQuasi-Living Polymerization of Propene with an Isotactic-Specific Zirconocene Catalyst.
Propene polymerization with isotactic (iso)-specific C₂-symmetric rac-Me₂Si(2-Me-Benz(e)-Ind)₂ZrCl₂ (1) and rac-Me₂Si(2-Me-4-Ph-1-Ind)₂ZrCl₂ (2) were conducted under various conditions for achieving iso-specific living polymerization of propene. When Complex 1 was activated with trialkylaluminum-free modified methylaluminoxane (dMMAO) at -40 °C, the number-average molecular weight (Mn) linearly...
متن کاملPOLYMERIZATION OF PROPENE WITH BuNSiMe2C5Me4TiMe2: EFFECTS OF TRIALKYLALUMINIUMS AS ADDITIVES
ABSTRACT. Propene was polymerized at 0 C with tBuNSiMe2C5Me4TiMe2/MAO. Kinetic features and other parameters indicated quasi-living polymerization. Effects of various trialkylaluminiums as additives have been investigated; it was found that compounds with more bulky groups like iBu3Al, Oct3Al increased the activities significantly whereas Me3Al and Et3Al reduced the activities of the catalyst s...
متن کاملpropene-cycloolefin polymerization
highly active metallocenes and other single site catalysts have opened up the possibility of polymerizing cycloolefins such as norbornene (n) or of copolymerizing them with ethene (e) or propene (p). the polymers obtained show exciting structures and properties. e-n copolymers are industrially produced materials, with variable and high glass transitions depending on the wide range of their micr...
متن کاملDesign of stereoselective Ziegler-Natta propene polymerization catalysts.
After five decades of largely serendipitous (albeit formidable) progress, catalyst design in Ziegler-Natta olefin polymerization, i.e., the rational implementation of new active species to target predetermined polyolefin architectures, has ultimately become a realistic ambition, thanks to a much deeper fundamental understanding and major advances in the tools of computational chemistry. In this...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Polymer Science Part A: Polymer Chemistry
سال: 1999
ISSN: 0887-624X,1099-0518
DOI: 10.1002/(sici)1099-0518(19990315)37:6<691::aid-pola2>3.3.co;2-0