Study of propylene-1-butene-ethylene terpolymer and reactor blend by TREF and13C-NMR

2001 ◽  
Vol 80 (11) ◽  
pp. 1880-1890 ◽  
Author(s):  
Adilson Arli Silva Filho ◽  
Griselda Barrera Galland
Keyword(s):  
Reactor Blend

Reactor Blend and Nanocomposite of Polyethylene Using a Binary Catalyst of Metallocene/Nickel

2020 ◽  
Vol 62 (6) ◽  
pp. 612-620
Author(s):  
Mohammad Kazemi ◽  
Ali Javidnia ◽  
Navid Ramezanian ◽  
Gholam Hossein Zohuri ◽  
Mohsen Mogheiseh
Keyword(s):  
Binary Catalyst ◽  
Reactor Blend

scholarly journals Ethylene-co-norbornene Copolymerization Using a Dual Catalyst System in the Presence of a Chain Transfer Agent

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 554 ◽  
Author(s):  
Laura Boggioni ◽  
Diego Sidari ◽  
Simona Losio ◽  
Udo Stehling ◽  
Finizia Auriemma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Chain Transfer ◽  
Catalyst System ◽  
Polymer Chains ◽  
Chain Transfer Agent ◽  
Reactivity Ratios ◽  
A Chain ◽  
Reactor Blend ◽  
The Ideal

Ethylene-co-norbornene copolymers were synthesized by a dual catalyst system at three concentrations of norbornene in the feed and variable amounts of ZnEt2, as a possible chain transfer agent. The dual catalyst system consists of two ansa-metallocenes, isopropyliden(η5-cyclopentadienyl)(η5-indenyl)zirconium dichloride (1) and isopropyliden(η5-3-methylcyclopentadienyl)(η5-fluorenyl)zirconium dichloride (2), activated with dimethylanilinium tetrakis(pentafluorophenyl)borate, in presence of TIBA. Values of norbornene content, molecular mass, glass transition temperature, and reactivity ratios r11 and r21 of copolymers prepared in the presence of 1+2 are intermediate between those of reference copolymers. The study of tensile and elastic properties of ethylene-co-norbornene copolymers (poly(E-co-N)s) gave evidence that copolymers were obtained in part through transfer of polymer chains between different transition metal sites. Mechanical properties are clearly different from those expected from a blend of the parent samples and reveal that copolymers obtained in the presence of 1+2 and ZnEt2 consist of a reactor blend of segmented chains produced by exchange from 2 to 1 and 1 to 2 acting as the ideal compatibilizer of chains produced by the chain transfer from 1 to 1, and from 2 to 2.

Low Warpage Nanophase-Separated Polypropylene/Olefinic Elastomer Reactor Blend Composites with Digitally Tuned Glass Fiber Orientation by Extrusion-Based Additive Manufacturing

2021 ◽  
Vol 3 (4) ◽  
pp. 2070-2081
Author(s):  
Carl G. Schirmeister ◽  
Sebastian Schächtele ◽  
Yannic Keßler ◽  
Timo Hees ◽  
Rainer Köhler ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Glass Fiber ◽  
Fiber Orientation ◽  
Reactor Blend
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