Results 71 to 80 of about 651 (134)

Understanding the activity and stability of Lewis acid-modified Ziegler–Natta catalysts for the sustainable production of polypropylene

Journal of Taibah University for Science
Cleaner polymer production involves minimizing environmental impact by using efficient catalysts and eco-friendly synthesis methods. Identifying active and stable catalysts is essential.
Rafik Rajjak Shaikh, Yodsamol Sainu, Supareak Praserthdam, Piyasan Praserthdam   +3 more
doaj   +1 more source

Polimerização 1,4-cis de butadieno com sistemas catalíticos Ziegler-Natta à base de neodímio

Química Nova, 2004
Nowadays the catalyst systems based on neodymium are the ones most used in the high cis polybutadiene production. These systems contain a neodymium compound (catalyst), an alkylaluminium compound (cocatalyst) and a halogen compound (halogenating agent ...
Mello Ivana L., Coutinho Fernanda M. B., Soares Bluma G., Nunes Denise S. S., Costa Marcos A. S., Maria Luiz Claudio de Santa   +5 more
doaj  

Fluid-mediated nuclearity control in heterogeneous polyolefin catalysis

Nature Communications
The nuclearity of active sites in heterogeneous Ziegler-Natta catalysts fundamentally governs polyolefin microstructure, yet its dynamic regulation during polymerization remains challenging.
Zaitian He, Jingyuan Sun, Qingyuan Zheng, Wei Li, Lynn F. Gladden, Jingdai Wang, Yongrong Yang   +6 more
doaj   +1 more source

Comparative Study on Kinetics of Ethylene and Propylene Polymerizations with Supported Ziegler⁻Natta Catalyst: Catalyst Fragmentation Promoted by Polymer Crystalline Lamellae. [PDF]

Polymers (Basel), 2019
Zhang Z, Jiang B, He F, Fu Z, Xu J, Fan Z.   +5 more
europepmc   +1 more source

The Effects of Preparation Methods and Internal Electron Donors on Ziegler-Natta Catalyst Performance and Polypropylene Properties. [PDF]

Polymers (Basel)
Li B, Li H, Chen Z, Hu H, Zhou Y, Mao G, Xin S.   +6 more
europepmc   +1 more source

MgCl₂-Supported Titanium Ziegler-Natta Catalyst Using Carbon Dioxide-Based Poly(propylene ether carbonate) Diols as Internal Electron Donor for 1-Butene Polymerization. [PDF]

Polymers (Basel), 2017
Cui X, Bai Q, Ma K, Yang M, Liu B.
europepmc   +1 more source

The Role of Stretching-Induced Phase Transformations in the Mechanical Properties of Isotactic 1‑Butene-ethylene Copolymers from Ziegler-Natta Catalyst. [PDF]

Macromolecules
Malafronte A, Di Girolamo R, Giordano A, De Stefano F, Scoti M, De Rosa C.   +5 more
europepmc   +1 more source

Computational Study on the Inhibition Mechanisms of the Ziegler-Natta Catalyst in the Propylene Polymerization Process: Part 1 Effects of Acetylene and Methylacetylene. [PDF]

Int J Mol Sci
Hernandez-Fernandez J, Bello-León E, Marquez E.   +2 more
europepmc   +1 more source

The production of high efficiency Ziegler-Natta catalyst with dual active sites nature using cyclohexyl chloride as promoter with super activity and produced superior polyethylene with controllable molecular weight distribution. [PDF]

Des Monomers Polym, 2017
Seifali Abbas-Abadi M.
europepmc   +1 more source

Experimental and first-principles investigation on how support morphology determines the performance of the Ziegler-Natta catalyst during ethylene polymerization. [PDF]

Sci Rep
Saelee T, Sitthijun P, Ngamlaor C, Kerdprasit N, Rittiruam M, Khajondetchairit P, Da Silva JLF, Buasuk N, Praserthdam P, Praserthdam S.   +9 more
europepmc   +1 more source