Results 81 to 90 of about 117,309 (167)

Dramatic Enhancement of Activities for Living Ziegler−Natta Polymerizations Mediated by “Exposed” Zirconium Acetamidinate Initiators:  The Isospecific Living Polymerization of Vinylcyclohexane

, 2016
Dramatic Enhancement of Activities for Living Ziegler−Natta Polymerizations Mediated by “Exposed” Zirconium Acetamidinate Initiators:  The Isospecific Living Polymerization of ...
Kumudini C. Jayaratne (2443618), Lisa A. Koterwas (2984184), Lawrence R. Sita (1532260), David A. Henningsen (2982693), Richard J. Keaton (2504707)   +4 more
core   +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

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

The evolution of new generaton 'single-site' Ziegler-Natta polymerization catalysts [PDF]

, 2000
Since the discovery of stereospecific polymerization of olefins by K. Ziegler and G. Natta in 1955, tremendous developments have occurred in the area of designing polymerization catalysts.
Bajgur, Chandrasekhar S., Sivaram, S.
core   +1 more source

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  

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  

The Lanthanide Ziegler−Natta Model:  Aluminum-Mediated Chain Transfer

, 2016
C2-symmetric tetraalkylaluminate complexes rac-[Me2Si(2-Me-C9H5)2]Y(μ-R)2AlR2 and terminal alkyl complexes rac-[Me2Si(2-Me-C9H5)2]YR(THF) (R = Me, Et, iBu) are quantitatively formed via a special silylamide elimination reaction.
Wolfgang Scherer (1265952), Peter Sirsch (1265934), Michael G. Klimpel (3076794), Jörg Eppinger (419593), Reiner Anwander (1367811)   +4 more
core   +2 more sources

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

Catalisadores De Ziegler-natta Suportados Em Oxidos Modificados,processo Para Sua Preparacao E Processo De Polimerizacao De Olefinas

, 1992
Patente de invenção: “CATALISADORES DE ZIEGLER-NATTA SUPORTADOS EM ÓXIDOS MODIFICADOS, PROCESSO PARA SUA PREPARAÇÃO E PROCESSO DE POLIMERIZAÇÃO DE OLEFINAS”. A presente invenção trata de catalisadores de Ziegler-Natta suportados em óxidos modificados, do
Joekes Ines, Jerico Soraya, Nobre Marcos Antonio, Schuchardt Ulf Friedreich   +3 more
core  

Quality control for Ziegler-Natta catalysis via spectroscopic fingerprinting [PDF]

, 2018
Commercial olefin polymerization catalysts are typically produced at a manufacturing site before transport to production facilities for storage and eventual use.
Vantomme, Aurélien, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Pletcher, Paul, Welle, Alexandre, Weckhuysen, Bert M.   +5 more
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