Results 71 to 80 of about 117,309 (167)

Impact of Commercial Polyolefin Architecture and Composition on Its Ability to Compatibilize High‐Density Polyethylene/Isotactic Polypropylene Blends

Journal of Polymer Science, Volume 64, Issue 14, Page 3057-3072, 15 July 2026.
This research elucidates the relationship between the molecular structure of commercially available ethylene–propylene copolymers and an ethylene/1‐olefin copolymer and its ability to compatibilize high‐density polyethylene/isotactic polypropylene blends. These findings indicate that the compatibilization of these blends with random copolymers benefits
Bailey Eberle, Susan K. Houston, Hannah Giffin, Mark Dadmun   +3 more
wiley   +1 more source

Dimerization of 1-butene via zirconium-based Ziegler-Natta catalyst

, 2000
A zirconium-based Ziegler-Natta catalytic system has been tested in the dimerization of 1-butene. It was found that the concentration of Et2AlCl, Ph3P and PhONa as well as the reaction temperature had great influences on the activity and selectivity of ...
Han, XW, Zhang, WP, He, R, Bao, XH, Li, C   +4 more
core  

The blocky structure of Ziegler-Natta "random" copolymers: Myths and experimental evidence

, 2020
The crystallization behavior of butene-ethylene random isotactic copolymers prepared with a Ziegler-Natta catalyst, in particular the surprising crystallization of form II of isotactic polybutene in samples with a high ethylene concentration, provides ...
De Rosa C., Malafronte A., Di Girolamo R., Auriemma F., Talarico G., Scoti M., Ruiz De Ballesteros O.   +6 more
core   +1 more source

Avaliação das condições de envelhecimento do sistema catalítico versatato de neodímio/hidreto de di-isobutilalumínio/cloreto de t-butila na polimerização de 1,3-butadieno

Polímeros, 2014
O objetivo deste trabalho foi estudar sistemas catalíticos ternários constituídos por versatato de neodímio, cloreto de t-butila e hidreto de di-isobutil-alumínio para a polimerização de 1,4-cis de butadieno em hexano.
Neusa Maria Tocchetto Pires, Bluma Guenther Soares, Fernanda Margarida Barbosa Coutinho, André Luiz Carneiro Simões, Marcos Antonio da Silva Costa   +4 more
doaj   +1 more source

Homogeneous Ziegler-Natta polymerisation: A kinetic approach .2. Transient-state kinetics [PDF]

, 1997
An integrated view is presented of several possible mechanisms applicable to the interpretation of homogeneous Ziegler-Natta polymerisation. In this paper, the transient aspects related to the kinetics of Ziegler-Natta polymerisation are investigated ...
Justino, Jorge, Lemos, F., Costa, C., Marques, M.M., Ribeiro, F.R., Dias, A.R.   +5 more
core   +1 more source

Principais aspectos da polimerização do 1,3-butadieno Principles aspects of butadiene 1,3 polymerization

Polímeros, 2005
Atualmente, há uma grande demanda pelo polibutadieno com alto teor de unidades 1,4-cis, devido às suas excelentes propriedades físicas, tais como alta resistência à abrasão, baixo desenvolvimento de calor, baixa resistência ao rolamento, maior ...
Denise S. S. Nunes, Fernanda M. B. Coutinho, Ivana L. Mello   +2 more
doaj   +1 more source

Electronic Structure, IR and UV-Vis Spectra of Some Suggested Ziegler-Natta Catalysts

Journal of Kufa-Physics, 2018
 Three aluminum metal complexes were suggested as Ziegler-Natta catalysts and studied theoretically at the ground and excited states. Becke’s three parameter exchange with Lee, Yang, and Parr correlation functional) density functional theory and SDD ...
Faeq A. AL-Temimeia, Hamid I. Abboodb
doaj   +1 more source

Propylene Polymerization Performance with Ziegler-Natta Catalysts Combined with U-Donor and T01 Donor as External Donor

, 2022
In propylene (C3) polymerization with Ziegler-Natta catalyst, not only internal donor but also external donor is very important to make isotactic polypropylene (PP) with higher yield.
Hideo Funabashi, Padavattan Govindaswamy, Emiko Wada, Hiroyuki Kono, Toshiya Uozumi   +4 more
core   +1 more source

Direct Observation of the Structural Isomerization of a Cationic Group 4 Ziegler−Natta Insertion Product

, 2016
An experimental model that allows for direct observation of a structural isomerization that is relevant to the group 4 metal-mediated Ziegler−Natta polymerization of α-olefins is presented.
Lawrence R. Sita (1532260), Richard J. Keaton (2504707)   +1 more
core   +1 more source

Übergangsmetall-Katalysatoren für die Olefinpolymerisation: 2. Herstellung von stereo-regularen Poly(1-olefinen)

CHIMIA, 1996
The insertion polymerization of propene by using chiral transition metal compounds leads to a variety of poly propene products with different stereoregularities.
Rolf Mülhaupt, Bernhard Rieger
doaj   +2 more sources