Results 11 to 20 of about 91,509 (283)

"Synthesis and structural regulation of low vinyl polybutadiene-b-polyvinylpyridine block copolymers "

Hecheng xiangjiao gongye, 2023
A low vinyl polybutadiene (PB)-polyvinylpyridine （PVP） diblock copolymers (lvPB-b-PVP) with the same segment length of PB but different segment length of PVP and controllable molecular weight and its distribution was designed and synthesized using ...
WANG Bo, YANG Jia-xin, MA Hong-wei, LI Yang, HAN Li
doaj   +1 more source

Recent advances in the polymerization of butadiene over the last decade [PDF]

Polyolefins Journal, 1999
The stereospecific polymerization of conjugated dienes began in 1954 with the first catalysts obtained by combining TiCl4 or TiCl3 with aluminum-alkyls, i.e.
Giovanni Ricci, Giuseppe Leone
doaj   +1 more source

Rich methane laminar flames doped with light unsaturated hydrocarbons. Part II: 1,3butadiene [PDF]

, 2007
In line with the study presented in the part I of this paper, the structure of a laminar rich premixed methane flame doped with 1,3-butadiene has been investigated.
Allara, Barbé, Baulch, Belmekki, Benson, Benson, Bounaceur, Brezinsky, Cavallotti, Cole, Colket, Da Costa, Dagaut, Dagaut, Dayma, Ellis, F. Battin-Leclerc, Fournet, Granata, Gueniche, H.A. Gueniche, Heyberger, Hidaka, Hidaka, Hidaka, Laskin, Leung, Lindstedt, Marinov, McEnally, McEnally, Miller, Muller, Olten, P.A. Glaude, Perrin, Perry, R. Fournet, Rasmussen, Simmie, Skjøth-Rasmussen, Troe, Tsang, Tsang, Wang, Warnatz, Warth, Westmoreland   +47 more
core   +5 more sources

A novel synthetic strategy for styrene–butadiene–styrene tri-block copolymer with high cis-1,4 units via changing catalytic active centres [PDF]

Royal Society Open Science, 2019
A styrene–butadiene–styrene tri-block copolymer (SBS) with a high cis-1,4 unit content (greater than 97%) was synthesized by a novel synthetic strategy based on changing the catalytic active centres using n-butyllithium and a nickel-based catalyst ...
Jie Liu, Xin Min, Xuan Zhang, Xiuzhong Zhu, Zichao Wang, Tong Wang, Xiaodong Fan   +6 more
doaj   +1 more source

Dynamics of Pd Subsurface Hydride Formation and Their Impact on the Selectivity Control for Selective Butadiene Hydrogenation Reaction

Nanomaterials, 2023
Structure-sensitive catalyzed reactions can be influenced by a number of parameters. So far, it has been established that the formation of Pd-C species is responsible for the behavior of Pd nanoparticles employed as catalysts in a butadiene partial ...
Esther Asedegbega-Nieto, Ana Iglesias-Juez, Marco Di Michiel, Marcos Fernandez-Garcia, Inmaculada Rodriguez-Ramos, Antonio Guerrero-Ruiz   +5 more
doaj   +1 more source

How Topological Differences between Two Oxide Surfaces Determine Selectivity—The Case of the Dehydra-Decyclization of Tetrahydrofuran

Chemistry, 2023
Production of butadiene from biomass-based tetrahydrofuran (THF) is explored as an alternative to the existing petroleum-based processes. Metal oxide catalysts have been shown to exhibit varying product selectivities when reacted with THF.
Sai Praneet Batchu, Stavros Caratzoulas, Dionisios G. Vlachos   +2 more
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Safety assessment of the substance (butadiene, styrene, methyl methacrylate, butyl acrylate) copolymer cross-linked with divinylbenzene or 1,3-butanediol dimethacrylate for use in food contact materials [PDF]

, 2016
Publisher ...
Andrew Smith, André Penninks, Christina Tlustos, Claudia Bolognesi, Corina‐Aurelia Zugravu, Detlef Wölfle, Eric Barthélémy, Eugenia Lampi, Holger Zorn, Jean‐Pierre Cravedi, Karl‐Heinz Engel, Kettil Svensson, Konrad Grob, Laurence Castle, Maria de Fátima Tavares Poças, Maria Rosaria Milana, Martine Kolf‐Clauw, null null, Paul Fowler, Rainer Gürtler, Roland Franz, Sirpa Kärenlampi, Trine Husøy, Vittorio Silano, Wim Mennes   +24 more
core   +1 more source

Conversion of Ethanol to Butadiene over Binary MgO-SiO₂ Mixed Oxides Prepared by the Ammonia Evaporation Method

Chemistry, 2023
The ammonia evaporation method, originally applied for the preparation of highly dispersed silica-supported copper catalysts, was used to synthesize magnesia-silica for the one-step conversion of ethanol to 1,3-butadiene.
Ismail Bin Samsudin, Stephan Jaenicke, Gaik-Khuan Chuah   +2 more
doaj   +1 more source

The Importance of Thermal Treatment on Wet-Kneaded Silica–Magnesia Catalyst and Lebedev Ethanol-to-Butadiene Process

Nanomaterials, 2021
The Lebedev process, in which ethanol is catalytically converted into 1,3-butadiene, is an alternative process for the production of this commodity chemical. Silica–magnesia (SiO2–MgO) is a benchmark catalyst for the Lebedev process.
Sang-Ho Chung, Adrian Ramirez, Tuiana Shoinkhorova, Ildar Mukhambetov, Edy Abou-Hamad, Selevedin Telalovic, Jorge Gascon, Javier Ruiz-Martínez   +7 more
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Síntese de catalisadores Ziegler-Natta: algumas rotas e suas dificuldades Synthesis of Ziegler-Natta catalysts: some routes and their difficulties

Química Nova, 1997
The Ziegler-Natta catalyst and the polymerization thereof are systems which require careful handling and special treatment of chemicals. In spite of the use of inert atmosphere and dry chemicals, some Ziegler-Natta systems may present low activities or ...
Thaís H. S. Costa, Marcos A. S. Costa, Luiz Claudio de Santa Maria, Fernanda M. B. Coutinho, Neusa M. T. Pires   +4 more
doaj   +1 more source