Zobrazeno 1 - 10
of 2 995
pro vyhledávání: '"Ziegler-Natta catalyst"'
Autor:
Masayoshi Saito, Hiroshi Kashimura, Takuo Kataoka, Masahide Murata, Yusuke Sakuda, Hiroyuki Yamada, Hideyuki Takahashi
Publikováno v:
Polyolefins Journal, Vol 11, Iss 2, Pp 115-124 (2024)
This report is on the characterization of active Ti center in heterogeneous Ziegler-Natta catalysts with Soft X-ray Emission Spectrometer (SXES). Since titanium in the catalyst has various chemical bonds, it is important to grasp the chemical bond st
Externí odkaz:
https://doaj.org/article/ea546f98fc1a4d3ba26697c205109c11
Publikováno v:
Polyolefins Journal, Vol 11, Iss 2, Pp 83-93 (2024)
Polypropylene is one of the most widely used synthetic resins, which is mainly synthesized with Ziegler-Natta catalysts. In this paper, the functionalized Ziegler-Natta catalyst is applied to prepare high-performance polypropylene. A new way to synth
Externí odkaz:
https://doaj.org/article/148e8d62ea6e46c589472e9f951e6fe1
Autor:
Hiren Bhajiwala, Virendrakumar Gupta
Publikováno v:
Polyolefins Journal, Vol 11, Iss 1, Pp 61-70 (2024)
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). The impact of temperature and the presence of a chain-terminating age
Externí odkaz:
https://doaj.org/article/b28f804b78064b9b87dba0a6210048ed
Publikováno v:
International Journal of Molecular Sciences, Vol 25, Iss 19, p 10585 (2024)
Acetylene and methylacetylene are impurities commonly found in the raw materials used for the production of polymers such as polypropylene and polyethylene. Experimental evidence indicates that both acetylene and methylacetylene can decrease the prod
Externí odkaz:
https://doaj.org/article/27c7d95a114243d08e242260be3e66e0
Autor:
Thanyaporn Pongchan, Praonapa Tumawong, Wanna Phiwkliang, Sutheerawat Samingprai, Piyasan Praserthdam, Bunjerd Jongsomjit
Publikováno v:
South African Journal of Chemical Engineering, Vol 46, Iss , Pp 56-64 (2023)
The effect of different prepared magnesium sources including MgCl2 (ZN-THF), metallic magnesium powder (ZN-O), and MGE (ZN-MGE) as the support of titanium-based Ziegler-Natta catalysts on behaviors of gas-phase ethylene/1-hexene copolymerization was
Externí odkaz:
https://doaj.org/article/deac36ee36834b4eb8526dee3f2b6dc5
Publikováno v:
Hecheng xiangjiao gongye, Vol 47, Iss 4, Pp 348-348 (2024)
The precursor MgCl2 · nROH of supported Ziegler Natta catalyst was prepared by chemical activation method, and different pre catalysts TiCl4/MgCl2 (C-Cat) were prepared by loading TiCl4. At the same time, the pre catalysts TiCl4/MgCl2 (P-Cat) and C-
Externí odkaz:
https://doaj.org/article/c932a409c2cb4275b2e8619419adc4b4
Publikováno v:
SynOpen, Vol 07, Iss 03, Pp 293-296 (2023)
Externí odkaz:
https://doaj.org/article/379f7e0445cc4f1fadc2c65ab560c703
Publikováno v:
Polymers, Vol 16, Iss 5, p 605 (2024)
This study outlines the investigation into how the compounds CO2, CO, and O2 interact with the active center of titanium (Ti) on the surface of MgCl2 and how these interactions impact the productivity of the Ziegler–Natta catalyst, ultimately influ
Externí odkaz:
https://doaj.org/article/3c90c00141c94d2c940035975841b948
Autor:
Huasheng Feng, Changxiu Li, Junling Zhou, Xiaofan Zhang, Shuxuan Tang, Xiangya Xu, Zhihui Song
Publikováno v:
Polymers, Vol 16, Iss 4, p 559 (2024)
Experimental investigations and density functional theory (DFT) calculations were carried out to study the comprehensive effect of different 3,5-heptanedioldibenzoate (HDDB) optical isomers as the internal electron donor on the catalytic performance
Externí odkaz:
https://doaj.org/article/28ec545477744cb8a01d0c2938d81d30
Publikováno v:
Polymer Testing, Vol 124, Iss , Pp 108084- (2023)
The creep resistance of polymer determines the dimensional stability of product under stress. The isotactic polybutene-1 (iPB) with outstanding high-temperature creep resistance and stress-crack resistance is applied widely in the field of hot-water
Externí odkaz:
https://doaj.org/article/f21da4eb08024724897d56fcec64e250