An environmentally benign approach for the synthesis of low molar mass polybutenes from mixed C4 monomers using AlCl3/ionic-liquid initiating systems

Kahkeshi, Zahra Izadi; Bahri-Laleh, Naeimeh; Sadjadi, Samahe; Haghighi, Mehdi Nekoomanesh

doi:10.1016/j.mcat.2023.113332

Cited by 3 publications

(1 citation statement)

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“…Nevertheless, such products are also in demand, and the practical use of ILs without additional donors cannot be ruled out. These studies were continued with the use of boehmite as a support for ILs and the use of C4 hydrocarbon feed as a raw material [ 110 ]. The content of isobutylene units in the polymer was 75–85%, with low exo -olefinic content.…”

Section: Three Generations Of Modern Catalystsmentioning

confidence: 99%

Polyisobutylenes with Controlled Molecular Weight and Chain-End Structure: Synthesis and Actual Applications

et al. 2023

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The polymerization of isobutylene allows us to obtain a wide spectrum of polyisobutylenes (PIBs) which differ in their molecular weight characteristics and the chemical structure of chain-end groups. The bulk of the PIBs manufactured worldwide are highly reactive polyisobutylenes (HRPIBs) with –C(Me)=CH2 end-groups and low-molecular weights (Mn < 5 kDa). HRPIBs are feedstocks that are in high demand in the manufacturing of additives for fuels and oils, adhesives, detergents, and other fine chemicals. In addition, HRPIBs and CMe2Cl-terminated PIBs are intensively studied with the aim of finding biomedical applications and for the purpose of developing new materials. Both chain control (molecular weight and dispersity) and chemoselectivity (formation of exo-olefinic or –CMe2Cl groups) should be achieved during polymerization. This review highlights the fundamental issues in the mechanisms of isobutylene polymerization and PIB analysis, examines actual catalytic approaches to PIBs, and describes recent studies on the functionalization and applications of HRPIBs and halogen-terminated PIBs.

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Section: Three Generations Of Modern Catalystsmentioning

confidence: 99%