Results 41 to 50 of about 630 (116)

Preparation of Ultrahigh Molecular Weight Polyethylene/Graphene Nanocomposite In situ Polymerization via Spherical and Sandwich Structure Graphene/Sio2 Support

Nanoscale Research Letters, 2018
Reduced graphene oxide/SiO2 (RGO/SiO2) serving as a novel spherical support for Ziegler-Natta (Z-N) catalyst is reported. The surface and interior of the support has a porous architecture formed by RGO/SiO2 sandwich structure.
Enqi Su, Wensheng Gao, Xinjun Hu, Caicai Zhang, Bochao Zhu, Junji Jia, Anping Huang, Yongxiao Bai   +7 more
doaj   +1 more source

Influência do envelhecimento de catalisadores Ziegler-Natta à base de neodímio sobre a polimerização de 1,3-butadieno Influence of ageing of neodymium based Ziegler-Natta catalyst on butadiene polymerization

Polímeros, 2007
Catalisadores envelhecidos em diferentes tempos (0, 5, 15, 40, 80 e 160 dias) e diferentes temperaturas (10, 25 e 40 °C) foram testados na polimerização 1,4-cis do 1,3-butadieno.
Ivana L. Mello, Bluma G. Soares, Fernanda M. B. Coutinho, Denise S. S. Nunes   +3 more
doaj   +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

Polimerização 1,4 - cis de butadieno com o sistema catalítico tetracloreto de titânio/triisobutilalumínio/iodo 1,4 cis-Polymerization of butadiene by the catalyst system titanium tetrachloride/triisobutylaluminium/iodine

Polímeros, 2000
Foi utilizado o sistema catalítico tipo Ziegler-Natta modificado, constituído por TiCl4/I2/Al(i-Bu)3 para a síntese de polibutadieno com alto teor de unidades 1,4-cis.
Neusa M. T. Pires, Marcos A. S. Costa, Fernanda M. B. Coutinho   +2 more
doaj   +1 more source

Evaluation of the Reactivity of Methanol and Hydrogen Sulfide Residues with the Ziegler-Natta Catalyst during Polypropylene Synthesis and Its Effects on Polymer Properties. [PDF]

Polymers (Basel), 2023
Hernández-Fernández J, González-Cuello R, Ortega-Toro R.   +2 more
europepmc   +1 more source

Experimental-Density Functional Theory (DFT) Study of the Inhibitory Effect of Furan Residues in the Ziegler-Natta Catalyst during Polypropylene Synthesis. [PDF]

Int J Mol Sci, 2023
Hernández-Fernández J, Puello-Polo E, Marquez E.   +2 more
europepmc   +1 more source

Impact of Traces of Hydrogen Sulfide on the Efficiency of Ziegler-Natta Catalyst on the Final Properties of Polypropylene. [PDF]

Polymers (Basel), 2022
Hernández-Fernández J, Cano H, Aldas M.   +2 more
europepmc   +1 more source

Theoretical-Experimental Study of the Action of Trace Amounts of Formaldehyde, Propionaldehyde, and Butyraldehyde as Inhibitors of the Ziegler-Natta Catalyst and the Synthesis of an Ethylene-Propylene Copolymer. [PDF]

Polymers (Basel), 2023
Hernández-Fernández J, Ortega-Toro R, Castro-Suarez JR.   +2 more
europepmc   +1 more source

Ultra-high molecular weight polyethylene synthesis using externally modified Si-Mg-Ti based Z-N catalyst system [PDF]

Polyolefins Journal
Ultra-high molecular weight polyethylene (UHMWPE) was synthesized using Bi-supported SiO2/MgCl2/TiCl4 (Si-Mg-Ti) Ziegler-Natta catalyst in conjugation with triethyl aluminum (TEA).
Hiren Bhajiwala, Virendrakumar Gupta
doaj   +1 more source

Coordination copolymerization monitoring of ethylene and alfa-olefins by in-line Raman spectroscopy. [PDF]

RSC Adv, 2022
Comparán-Padilla VE, García-Zamora M, Infante-Martínez R, Díaz JA, Villarreal-Cárdenas L, Rodríguez-Hernández MT, Pérez-Camacho O.   +6 more
europepmc   +1 more source