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Your search keyword '"Maryam Masoori"' showing total 3 results
Start Over Author "Maryam Masoori" Topic 01 natural sciences
3 results on '"Maryam Masoori"'

1. Investigation of the effect of Mg(OEt)2 manipulation on the ethylene and 1-butene co-polymerization performance of Ziegler-Natta catalysts

Author

Saeed Houshmandmoayed, Razieh Davand, Yasaman Maddah, Abdolhannan Sepahi, Mohammad Hossein Jandaghian, Reza Rashedi, Kamal Afzali, Ehsan Nikzinat, and Maryam Masoori

Subjects
Ethylene, Materials science, Polymers and Plastics, biology, 1-Butene, 02 engineering and technology, General Chemistry, Natta, 010402 general chemistry, 021001 nanoscience & nanotechnology, biology.organism_classification, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Polymerization, Polymer chemistry, Materials Chemistry, Ceramics and Composites, Particle size, Ziegler–Natta catalyst, 0210 nano-technology
Abstract

Although Ziegler-Natta catalysts were discovered more than four decades ago, many aspects of their characteristics are not fully understood. The effect of the support particle size on the final pro...

Published
2021
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2. Investigation of the effects of heat treatment parameters during synthesis of titanium-magnesium-based Ziegler-Natta catalysts

Author

Reza Rashedi, Abdolhannan Sepahi, Maryam Masoori, Yasaman Maddah, Ehsan Nikzinat, and Mohammad Hossein Jandaghian

Subjects
inorganic chemicals, Materials science, Polymers and Plastics, chemistry.chemical_element, macromolecular substances, 02 engineering and technology, Natta, 010402 general chemistry, 01 natural sciences, Catalysis, Aluminium, Materials Chemistry, Alkyl, chemistry.chemical_classification, biology, Magnesium, technology, industry, and agriculture, General Chemistry, Polymer, 021001 nanoscience & nanotechnology, biology.organism_classification, 0104 chemical sciences, chemistry, Chemical engineering, Polymerization, Ceramics and Composites, 0210 nano-technology, Titanium
Abstract

Many researchers have studied the effects of donors, promoters and alkyl aluminum compounds on the polymerization catalysts, the polymerization process and the final properties of polymers. Neverth...

Published
2020
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3. Copolymerization of ethylene α-olefin using MgCl2-ethanol adduct catalysts

Author

Seyed Mohammad Mahdi Mortazavi, Saeid Ahmadjo, Maryam Masoori, and Mohammad Vakili

Subjects
chemistry.chemical_classification, Olefin fiber, Ethylene, Materials science, Polymers and Plastics, Comonomer, 02 engineering and technology, General Chemistry, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Polymerization, Polymer chemistry, Materials Chemistry, Ceramics and Composites, Copolymer, Ziegler–Natta catalyst, 0210 nano-technology
Abstract

The effects of the type and concentration of comonomers 1-hexene and 1-octene in the copolymerization of ethylene were investigated using pre polymerized Ziegler-Natta (catalyst a) and without pre polymerized (catalyst b) catalysts in the presence of hydrogen as a chain transfer agent. The properties of produced polymers were characterized by a set of techniques: (SEM), (EDX), (DSC), (GPC). TIBA and DEAC were used as co catalysts. The results of microscopic and SEM images showed the morphology and structure of catalysts (a) and (b) and the obtained spherical polymers. In the presence of 1-hexene, activity of catalyst (a) was at its maximum. The comonomer 1-octene at 32 mmol presented its activity (1.7 × 103 g polymer/(g cat.h)) and after that, the activities decreased. Copolymerization of ethylene and 1-hexene by catalyst (b) showed higher activity (1.6 × 103 g polymer/ polymer/(g cat.h)) at 40 mmol concentration of 1-hexene in comparison to catalyst (a).

Published
2017
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