Results 41 to 50 of about 50,243 (307)

Living radical polymerization of ethylene: A challenge overcome?

, 2014
It's alive! A significant step forward in the controlled radical polymerization of ethylene through the reversible addition–fragmentation chain‐transfer process was reported recently by Monteil and co‐workers. Control over molecular weight, dispersity of
Schmidt, B. V. K. J., Schmidt, Bernhard V.K.J., Schmidt, B., Barner-Kowollik, Christopher, Barner-Kowollik, C.   +4 more
core   +1 more source

Kinetic Aspects of Polyester Solid State Polymerization

, 2009
The chapter describe the solid state polymerization of polyesters, and in particular it deals with 3.1. Introduction 3.2. Phenomena involved in solid state polymerization of polyesters 3.2.1. Possible reactions in solid state polymerization of polyesters
PILATI, Francesco, F. Pilati, TOSELLI, MAURIZIO, M. Toselli   +3 more
core   +1 more source

Optimization of the Production of Rubber Compounds Using Mathematical Models

Advanced Engineering Materials, EarlyView.
Rubber compounds were mixed in a batch internal mixer, and symbolic regression was used to derive mathematical models linking recipe and process parameters to ram path, torque, and mixing quality (incorporation, dispersion, distribution). Subsequent optimization with evolutionary algorithms identified operating conditions that reduce specific energy ...
Anke Bardehle, Andreas Limper, Ulrich Giese, Carlos Lucke, Mario Beiner, Christoph Gögelein, Lisa Leuchtenberger‐Engel, Christian Hopmann   +7 more
wiley   +1 more source

A simple and versatile nickel platform for the generation of branched high molecular weight polyolefins

Nature Communications, 2020
High-performance transition metal catalysts are a major driving force in academic and industrial polyolefin research. Here the authors show the synthesis and (co)polymerization studies of a simple and versatile α-imino-ketone nickel system, which is ...
Tao Liang, Shabnam B. Goudari, Changle Chen   +2 more
doaj   +1 more source

Imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalysts for ethylene polymerization and ethylene/1-hexene copolymerization [PDF]

Polyolefins Journal, 2016
A novel imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is investigated. The catalyst is prepared by modification of (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalysts via supporting vanadium ...
Ting Fu, Ruihua Cheng, Xuelian He, Zhen Liu, Zhou Tian, Boping Liu   +5 more
doaj   +1 more source

‐Based Ethylene Polymerization

, 2006
We report a simple method for tuning catalytic propertyof a metallocene-based catalyst, Cp2ZrCl2, for ethylene polymerization by the direct adsorption Of Cp2ZrCl2 onto multi-walled carbon nanotubes (MWCNTs). The direct interactions between MWCNTs and the
Lee, KB, Jung, YH, Kyung‐Bok Lee, Youngkyu Do, Park, S, Yoon, SW, Insung S. Choi, Do, Youngkyu, Sungjin Park, Dong Jin Kim, Choi, Insung, Paik, HJ, Kim, DJ, Seung Woong Yoon, Young Hwan Jung, Hyun‐jong Paik   +15 more
core   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Polymerization of Ethylene Catalyzed by Vanadium(III) Complexes

Orbital: The Electronic Journal of Chemistry, 2017
Thirty five  complexes of 1,2- bis(benzimidazole, benzothiazole and benzoxazole)benzene,  1,2-bis(benzimidazole, benzothiazole and benzoxazole)-4-methyl-benzene, 1,2-bis  (benzimidazole, benzothiazole and benzoxazole)4-bromobenzene, 1, 2-bis ...
Hamdi Ali Elagab
doaj   +3 more sources

The effect of iodo substituents in bis(phenoxyimine) zirconium complexes on the catalytic performance of homogeneous ethylene polymerization reactions [PDF]

Polyolefins Journal, 2018
Eight different zirconium phenoxyimine complexes were synthesized, characterized and tested as catalysts for ethylene polymerization. The phenoxyimine compounds were prepared by condensation of substituted salicylaldehydes with aliphatic and aromatic ...
Andrea Rimkus, Helmut Alt
doaj   +1 more source

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source