Study of Copolymerization and Functional Copolymers

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Chemistry".

Deadline for manuscript submissions: closed (20 April 2022) | Viewed by 3590

Special Issue Editor


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Guest Editor
Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
Interests: single-site catalysis in polymerization and transformations of α-olefins; coordination catalysis and organocatalysis for ring-opening polymerization; synthesis of high-margin petrochemical products; biodegradable polymers; DFT modeling of the mechanisms of organic reactions and catalytic processes
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Special Issue Information

Dear Colleagues,

A bold and innovative global strategy for the abandonment of conventional plastics for disposable articles forces us to develop new biodegradable materials—as well as to tirelessly improve the characteristics of polyolefins, rubbers and similar polymers. Besides the “green revolution” in the plastics industry, new methods, tools, and ideas in polymer chemistry are of great demand in biomedicine, molecular electronics, energy storage, and other actual areas of science, technology, and human life.

A great diversity of monomers, catalysts, reaction mechanisms, and methods of creating polymer architectures pave the way to new materials with unique properties. Copolymerization is one of the most efficient ways to realize functional copolymers, macromolecules containing “functions” in the broadest sense of the term—both “functionalized” (i.e., containing functional groups and organochemical meaning) and “functioning” (actuated by external stimuli).

This Special Issue focuses on creating a multidisciplinary forum of discussion on recent advances in functional copolymers, with its wide variety of subject matter.

Dr. Pavel Ivchenko
Guest Editor

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Keywords

  • alternating polymerization
  • anionic polymerization
  • cationic polymerization
  • coordination polymerization
  • copolymerization
  • controlled polymerization
  • free-radical polymerization
  • functional polymers
  • ring-opening polymerizations
  • single-site catalysts
  • organocatalysts

Published Papers (1 paper)

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Research

16 pages, 2854 KiB  
Article
Tandem Synthesis of Ultra-High Molecular Weight Drag Reducing Poly-α-Olefins for Low-Temperature Pipeline Transportation
by Ilya E. Nifant’ev, Alexander N. Tavtorkin, Alexey A. Vinogradov, Sofia A. Korchagina, Maria S. Chinova, Roman S. Borisov, Grigory A. Artem’ev and Pavel V. Ivchenko
Polymers 2021, 13(22), 3930; https://doi.org/10.3390/polym13223930 - 14 Nov 2021
Cited by 1 | Viewed by 3220
Abstract
Ultra-high molecular weight poly-α-olefins are widely used as drag reducing agents (DRAs) for pipeline transportation of oil and refined petroleum products. The synthesis of polyolefin DRAs is based on low-temperature Ziegler–Natta (ZN) polymerization of higher α-olefins. 1-Hexene based DRAs, the most effective at [...] Read more.
Ultra-high molecular weight poly-α-olefins are widely used as drag reducing agents (DRAs) for pipeline transportation of oil and refined petroleum products. The synthesis of polyolefin DRAs is based on low-temperature Ziegler–Natta (ZN) polymerization of higher α-olefins. 1-Hexene based DRAs, the most effective at room temperature, typically lose DR activity at low temperatures. The use of 1-hexene copolymers with C8–C12 linear α-olefins appears to offer a solution to the problem of low-temperature drag reducing. The present work aims to develop two-stage synthesis of polyolefin DRAs that is based on selective oligomerization of ethylene in the presence of efficient chromium/aminodiphosphine catalysts (Cr-PNP), followed by polymerization of the olefin mixtures, formed at oligomerization stage, using efficient titanium–magnesium ZN catalyst. We have shown that oligomerization of ethylene in α-olefin reaction media proceeds faster than in saturated hydrocarbons, providing the formation of 1-hexene, 1-octene, and branched C10 and C12 olefins; the composition and the ratio of the reaction products depended on the nature of PNP ligand. Oligomerizates were used in ZN polymerization ‘as is’, without additional treatment. Due to branched character of C10+ hydrocarbons, formed during oligomerization of ethylene, resulting polyolefins demonstrate higher low-temperature DR efficiency at low polymer concentrations (~1 ppm) in comparison with benchmark polymers prepared from the mixtures of linear α-olefins and from pure 1-hexene. We assume that faster solubility and more efficient solvation of the polyolefins, prepared using ‘tandem’ ethylene-based process, represent an advantage of these type polymers over conventional poly(1-hexene) and linear α-olefin-based polymers when used as ‘winter’ DRAs. Full article
(This article belongs to the Special Issue Study of Copolymerization and Functional Copolymers)
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