Results 221 to 230 of about 81,401 (281)

Fundamental aspects of heterogeneous Ziegler–Natta olefin polymerization catalysis: an experimental and computational overview

, 2020
MgCl2 supported Ziegler–Natta (Z–N) catalysts have emerged as the most exciting chemical process for polyolefin technology, which is responsible for the production of ∼150 million tons of polyolefin (polyethylene and polypropylene) per annum.
Jugal Kumawat, Virendrakumar Gupta
semanticscholar   +1 more source

Machine Learning-Aided Structure Determination for TiCl4–Capped MgCl2 Nanoplate of Heterogeneous Ziegler–Natta Catalyst

ACS Catalysis, 2019
Dynamic reconstruction under a physicochemical environment is an intrinsic property of solid surfaces, in particular when associated with catalysis on nanosized or nanostructured materials.
Gentoku Takasao, Toru Wada, Ashutosh Thakur, P. Chammingkwan, M. Terano, Toshiaki Taniike   +5 more
semanticscholar   +1 more source

The blocky structure of Ziegler–Natta “random” copolymers: myths and experimental evidence

, 2020
The crystallization behavior of butene–ethylene random isotactic copolymers prepared with a Ziegler–Natta catalyst, in particular the surprising crystallization of form II of isotactic polybutene in samples with a high ethylene concentration, provides ...
C. De Rosa, O. Ruiz de Ballesteros, Rocco di Girolamo, Anna Malafronte, F. Auriemma, G. Talarico, Miriam Scoti   +6 more
semanticscholar   +1 more source

Assessing 1,9-Decadiene/Propylene Copolymerization with Ziegler-Natta Catalysts to Long-Chain-Branched Polypropylene

Industrial & Engineering Chemistry Research, 2020
1,9-decadiene/propylene copolymerization is assessed as a way for Ziegler-Natta catalysts to access long chain-branched polypropylene.
Yang Liu, Yawei Qin, Jin‐Yong Dong
semanticscholar   +1 more source

Direct Preparation of Transparent Isotactic Polypropylene with Supported Ziegler–Natta Catalysts Containing Novel Eco-friendly Internal Electron Donors

, 2020
This study reported novel eco-friendly Ziegler-Natta catalysts containing bio-derived maleic rosinate tri-n-butyl and maleic rosinate tri-n-octyl as internal electron donors for propylene polymeriz...
Jiaojiao Zhang, Feng Nan, Hongchao Yu, Shaomeng Zhang, Xiaoqi Xia, Qigu Huang, J. Yi, Hongming Li, Zhong Zhao   +8 more
semanticscholar   +1 more source

Layer‐lattices in Ziegler–Natta catalysts

Journal of Polymer Science Part B: Polymer Physics, 1988
AbstractSome layered inorganic compounds of interest in old and new polymerization processes by Ziegler‐Natta stereospecific catalysis have been studied. The results are reported of an investigation concerning the crystallographic disorder phenomena in α‐TiCl3, VCl3, FeCl3, ball‐milled α‐MgCl2, β‐MgCl2, and in a new catalytic system produced according ...
ZANNETTI, ROBERTO, MAREGA, CARLA, MARIGO, ANTONIO, A. Martorana   +3 more
openaire   +1 more source

Crystallization Behavior of Copolymers of Isotactic Poly(1-butene) with Ethylene from Ziegler–Natta Catalyst: Evidence of the Blocky Molecular Structure

, 2019
The crystallization and thermal properties of copolymers of isotactic poly(1-butene) (iPB) with ethylene (iPBEt) synthesized with a Ziegler–Natta catalyst and ethylene (E) content between 7 and 45 ...
C. De Rosa, O. Ruiz de Ballesteros, F. Auriemma, G. Talarico, Miriam Scoti, Rocco di Girolamo, Anna Malafronte, F. Piemontesi, Dario Liguori, I. Camurati, G. Morini   +10 more
semanticscholar   +1 more source

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

Journal of Macromolecular Science, Part A, 2020
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.
Mohammad Hossein Jandaghian, Yasaman Maddah, Ehsan Nikzinat, Maryam Masoori, A. Sepahi, R. Rashedi   +5 more
semanticscholar   +1 more source

Role of a Multidentate Carbonate Donor in MgCl2-Supported Ziegler–Natta Olefin Polymerization Catalysis: An Experimental and Computational Approach

Journal of Physical Chemistry C, 2019
A new multidentate carbonate (3,3,3′,3′-tetramethyl-2,2′,3,3′-tetrahydro-1,1′-spirobiindane-5,5′,6,6′-tetracarbonate) is studied as a potential internal electron donor for Ziegler–Natta (Z–N) catal...
Jugal Kumawat, Parthiv M. Trivedi, Virendrakumar Gupta   +2 more
semanticscholar   +1 more source

High Throughput Experimentation Protocol for Quantitative Measurements of Regioselectivity in Ziegler–Natta Polypropylene Catalysis

Industrial & Engineering Chemistry Research, 2019
This paper introduces a high throughput experimentation method for fast and accurate evaluations of regioselectivity in Ziegler–Natta (ZN) propene polymerizations.
A. Vittoria, Alessio Mingione, R. Abbate, R. Cipullo, V. Busico   +4 more
semanticscholar   +1 more source