Results 1 to 10 of about 141 (107)

Ethylene Polymerization through Neutral Nickel Complexes Bearing Cyclic Imides

open access: yesAdvances in Polymer Technology, 2022
The catalyst synthesis of salicylaldimine Ni(II) complexes with bulky imide moieties, ethylene polymerization, and characterization of synthesized polyethylenes are described in this paper.
Hassan Arabi   +2 more
doaj   +1 more source

Iminopyridine Ni(II) Catalysts Affording Oily Hyperbranched Ethylene Oligomers and/or Crystalline Polyethylenes Depending on the Reaction Conditions: Possible Role of In Situ Catalyst Structure Modifications

open access: yesMacromol, 2021
Nickel-based ethylene polymerization catalysts have unique features, being able to produce macromolecules with a variable content of branches, resulting in polymers ranging from semicrystalline plastics to elastomers to hyperbranched amorphous waxes and ...
Ilaria D’Auria   +2 more
doaj   +1 more source

Foam Polyethylene Made of Recycled Polyethylene

open access: yesIOP Conference Series: Materials Science and Engineering, 2021
Abstract The paper deals with the main principles of foam polyethylene production by the addition of recycled polyethylene and a modifier in the initial mixture. Obtaining of the modified foam polyethylene will accomplish two important tasks: solve the environmental problem of recycling polyethylene waste and reduce the cost of the ...
O B Lyapidevskaya   +2 more
openaire   +1 more source

Influence of Ethylene-1-Alkene Copolymers Microstructure on Thermo-Rheological Behavior of Model Blends for Enhanced Recycling

open access: yesMacromol, 2022
Polyethylenes (PE) are the most commonly occurring ingredients for post-consumer recyclates (PCR). The structure–property relationships of different types of model PE-based blends are established using multiple thermo-rheological analyses.
Girish Galgali   +2 more
doaj   +1 more source

Chain-Extended Polyethylene [PDF]

open access: yesPolymer Journal, 1987
The current status of high-strength/high-modulus polyethylene fibres is reviewed with the emphasis on fundamental aspects of ultra-drawing and processability. The drawing mechanism as well as the temperature dependence of the drawability of UHMW-PE (ultra-high-molecular-weight polyethylene) will be discussed.
Lemstra, P. J.   +2 more
openaire   +1 more source

Radio-Oxidation of Electric Cabled Models: Ageing Evaluation at the Atomic Scale

open access: yesEnergies, 2022
The functionality of electric cables, being the safety components of plants, has to be ensured. In nuclear power plants, when they are in the reactor building, these cables can suffer γ irradiation even in normal operating conditions.
Muriel Ferry, Frederic Miserque
doaj   +1 more source

Polymerization of Ethylene Catalyzed by Vanadium(III) Complexes

open access: yesOrbital: 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

Relaxation and physicomechanical characteristics of polyethylenes with different molecular weights

open access: yesТонкие химические технологии, 2019
Objectives. Determination of the influence of molecular weight on the modulus of elasticity, yield, strength, and retardation processes in polyethylene.Methods.
R. A. Alekhina   +3 more
doaj   +1 more source

6-Arylimino-2-(2-(1-phenylethyl)naphthalen-1-yl)-iminopyridylmetal (Fe and Co) Complexes as Highly Active Precatalysts for Ethylene Polymerization: Influence of Metal and/or Substituents on the Active, Thermostable Performance of Their Complexes and Resultant Polyethylenes

open access: yesMolecules, 2020
A series of 6-arylimino-2-(2-(1-phenylethyl)naphthalen-1-yl)iminopyridines and their iron(II) and cobalt(II) complexes (Fe1–Fe5, Co1–Co5) were synthesized and routinely characterized as were Co3 and Co5 complexes, studied by single crystal X-ray ...
Wenhua Lin   +6 more
doaj   +1 more source

Comparison of transosseous suture and suture anchors in the fixation of rotator cuff tears: a biomechanical experimental study

open access: yesActa Orthopaedica et Traumatologica Turcica, 2021
Objectives: This study was designed to compare the primary fixation strength of transosseous sutures and suture anchors in rotator cuff repair.\nMethods: Thirty-two sheep shoulders were divided into four homogeneously equal groups.
Ata Can lar   +4 more
doaj  

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