Polymorphic Behavior and Mechanical Properties of Isotactic 1-Butene–Ethylene Copolymers from Metallocene Catalysts

2014 ◽  
Vol 47 (13) ◽  
pp. 4317-4329 ◽  
Author(s):  
Claudio De Rosa ◽  
Odda Ruiz de Ballesteros ◽  
Finizia Auriemma ◽  
Rocco Di Girolamo ◽  
Carmela Scarica ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallocene Catalysts ◽  
Polymorphic Behavior ◽  
Ethylene Copolymers

Mechanical properties of isotactic 1-butene-ethylene copolymers from Ziegler-Natta catalyst

Polymer ◽  
2021 ◽  
Vol 216 ◽  
pp. 123408
Author(s):  
Odda Ruiz de Ballesteros ◽  
Finizia Auriemma ◽  
Rocco Di Girolamo ◽  
Anna Malafronte ◽  
Miriam Scoti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ethylene Copolymers ◽  
Natta Catalyst ◽  
Ziegler Natta Catalyst

Microhardness of ethylene copolymers and correlation with their mechanical properties

1991 ◽  
Vol 10 (13) ◽  
pp. 739-741 ◽  
Author(s):  
C. Fonseca ◽  
J. M. Pere�a ◽  
J. G. Fatou
Keyword(s):  
Mechanical Properties ◽  
Ethylene Copolymers

Crystallization Properties and Polymorphic Behavior of Isotactic Poly(1-Butene) from Metallocene Catalysts: The Crystallization of Form I from the Melt

2009 ◽  
Vol 42 (21) ◽  
pp. 8286-8297 ◽  
Author(s):  
Claudio De Rosa ◽  
Finizia Auriemma ◽  
Odda Ruiz de Ballesteros ◽  
Fortunata Esposito ◽  
Domenico Laguzza ◽  
...  
Keyword(s):  
Metallocene Catalysts ◽  
Polymorphic Behavior ◽  
Crystallization Properties

Mechanical Properties of Syndiotactic Propylene−Ethylene Copolymers

2006 ◽  
Vol 39 (1) ◽  
pp. 249-256 ◽  
Author(s):  
Claudio De Rosa ◽  
Finizia Auriemma
Keyword(s):  
Mechanical Properties ◽  
Ethylene Copolymers

scholarly journals Thermal behavior of ethylene copolymers with di- and tri-alkenylsilsesquioxane comonomers synthesized by post-metallocene catalysts

2020 ◽  
Vol 142 (4) ◽  
pp. 1447-1456 ◽  
Author(s):  
Paweł Groch ◽  
Katarzyna Dziubek ◽  
Krystyna Czaja ◽  
Beata Sacher-Majewska
Keyword(s):  
Thermal Stability ◽  
Thermal Behavior ◽  
Polymer Chain ◽  
Nucleating Agent ◽  
Metallocene Catalysts ◽  
Side Group ◽  
Ethylene Copolymers ◽  
Polymerization Conditions ◽  
Thermal Stability Of ◽  
Melting And Crystallization

Abstract This paper reported thermal properties of ethylene copolymers with di- and tri-alkenylsilsesquioxanes (POSS) synthesized by bis(phenoxy-imine) Ti, Zr, V, and V salen-type complexes. Ethylene copolymers with multi-alkenyl POSS obtained by such complexes contain multi-alkenyl POSS incorporated into the polymer chain as a side group. They were characterized by different thermal behavior depending on the kind of multi-alkenyl POSS comonomer, and type of the catalyst used, as well as polymerization conditions and thus the structure of the copolymer chain. Ethylene/POSS copolymers differed in incorporation of POSS into the polymer chain, content of specific unsaturation groups, and molecular weight, as well as heterogeneity of polymer chain compositions. The incorporation of multi-alkenyl POSS into the polymer chain affected melting and crystallization processes of copolymers in different ways. The POSS units could act as a nucleating agent of macromolecules. The increasing POSS content in E/POSS copolymers resulted in increasing thermal stability of obtained products, regardless of the kind of multi-alkenylsilsesquioxanes used. Thermal stability of such copolymers increased with decreasing content of trisubstituted vinylene groups (internal saturations) as well. The highest improvement of thermal stability over 85 °C in comparison with PE was observed in case of E/POSS copolymers synthesized by bis(phenoxy-imine) zirconium catalyst. The composition heterogeneity of E/POSS copolymers was found to affect markedly thermal stability of E/POSS copolymers.

scholarly journals Poly (1-butene-ran-ethylene) Monomodal Copolymers from Metallocene Catalysts: Structural and Morphological Differences with Increasing Ethylene Content

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1133
Author(s):  
Carla Marega ◽  
Federica Malizia ◽  
Stefano Spataro
Keyword(s):  
Metallocene Catalysts ◽  
X Ray Diffraction ◽  
Ethylene Copolymers ◽  
X Ray ◽  
Ethylene Content ◽  
Morphological Differences ◽  
Melt Adhesives ◽  
Hot Melt ◽  
Crystal Modifications ◽  
Microscopic Techniques

Samples of random poly(butene-ran-ethylene) copolymers produced with metallocene catalysts were studied in order to elucidate the different behaviors of this particular class of materials as a function of increasing ethylene (C2) content. The samples cooled down from the melt are semi-crystalline or amorphous and crystallize in different crystal modifications, depending on the amount of C2. Thermal analysis, X-ray diffraction, and microscopic techniques were used to follow the changes of the materials with aging time and to understand the structural and morphological behavior with the aim of highlighting possible peculiar properties, which may be of great interest in the application of such materials in the field of Hot Melt adhesives.

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