Results 71 to 80 of about 856 (180)

Natural and synthetic isoprene rubbers obtained using Ziegler–Natta catalysts

Тонкие химические технологии
Objectives. To compare the properties of rubber compounds and rubbers based on natural rubber RSS1 and synthetic isoprene rubbers obtained using Ti, Nd, Gd catalysts, both when used individually in the formulation of rubber compounds and when synthetic ...
A. A. Zuev, V. L. Zolotarev, I. P. Levenberg, L. A. Kovaleva, I. Sh. Nasyrov   +4 more
doaj   +1 more source

An Investigation on Polymerization of Ethylene by Ziegler-Natta Catalyst in the Presence of a Promoter: Polymerization Behavior and Polymer Microstructure

Bulletin of Chemical Reaction Engineering & Catalysis, 2018
The effect of a halocarbon (ethyl chloride) as a promoter on a Ziegler-Natta catalyst composed of‌ T‌iCl4 (catalyst), AlEt3 (activator) and Mg(OEt)2 (support) in the polymerization of ethylene have been investigated.
Yaghoob Gholami, Majid Abdouss, Sadegh Abedi, Farhad Azadi, Pezhman Baniani, Maryam Arsalanfar   +5 more
doaj   +1 more source

Effects of various poisoning compounds on the activity and stereospecificity of heterogeneous Ziegler–Natta catalyst

Science and Technology of Advanced Materials, 2008
A TiCl4/ethylbenzoate/MgCl2 Ziegler–Natta catalyst was pretreated with chemically different poisoning compounds to investigate their effects on the catalyst activity and stereospecificity for propylene polymerization.
Kitti Tangjituabun et al
doaj  

Paramagnetic species in Ziegler Natta catalysts

, 2023
Abstract: This doctoral thesis investigates the nature and behavior of paramagnetic Ti(III) species in industrial Ziegler-Natta catalysts (ZNCs) used for the polymerization of polyethylene and polypropylene and is the result of a collaborative effort between the EPR laboratories of the University of Torino, the University of Antwerp and the Giulio ...
openaire   +2 more sources

Ziegler-Natta/茂金属催化剂制备超高分子量聚α-烯烃的研究

四川大学学报. 自然科学版, 2012
以传统的Ziegler-Natta（Z-N）/茂金属（Cp2ZrCl2）催化剂为主催化剂,以三乙基铝[（C2H5）3Al]为助催化剂,采用本体聚合法合成了具有超高分子量的烯烃类聚合物.采用正交试验的方法获得了最佳的催化剂配比条件（A为0.02 g、B为0.03 g、C为0.15 mL）.凝胶渗透色谱测得在该条件下所合成聚合物的Mw为1.12×10～7,Mn为2.96×10～6,多分散系数Mw/Mn为3.79.以旋转粘度计测得该条件下聚合物溶液的表观粘度为27 mPa·s.实验证明,通过采Ziegler ...
殷德刚, 赵梦奇, 吐尼莎古丽·阿吾提, 石伟, 姚美芹, 司马义·努尔拉   +5 more
doaj  

Síntese e caracterização de copolímeros de propeno com 1-hexeno e 1,5-hexadieno Synthesis and characterization of propylene/1-hexene and propylene/1,5-hexadiene copolymers

Polímeros, 2012
Copolímeros de propeno com 1-hexeno e 1,5-hexadieno, contendo diferentes teores de comonômeros, foram obtidos utilizando técnicas de polimerização em lama e em massa com catalisadores Ziegler-Natta heterogêneos de alta atividade.
Aline F. Lima, Grazielle R. Borges, Lauriane M. Candeco, José C. Pinto, Márcio Nele, Susana Liberman   +5 more
doaj  

Influence of the Ethanol Content of Adduct on the Comonomer Incorporation of Related Ziegler-Natta Catalysts in Propylene (Co)polymerizations. [PDF]

Polymers (Basel), 2023
Mehdizadeh M, Karkhaneh F, Nekoomanesh M, Sadjadi S, Emami M, Teimoury H, Salimi M, Solà M, Poater A, Bahri-Laleh N, Posada-Pérez S.   +10 more
europepmc   +1 more source

Ziegler–Natta Catalysts: Applications in Modern Polymer Science

SynOpen, 2023
Keshav Taruneshwar Jha, Abhimannu Shome, Pooja A Chawla   +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