Cationic polymerization of β-pinene in the presence of alkylaluminum chlorides as catalysts

  • Maksim I. Hulnik Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus; Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus
  • Olga V. Kuharenko Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus; Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus
  • Sergei V. Kostjuk Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus https://orcid.org/0000-0002-7466-3662

Abstract

Cationic polymerization of β-pinene, a naturally occurring monomer, was studied in the presence of different alkylaluminum chlorides ((iBu)3Al2Cl3, Et3Al2Cl3 и Мe2AlCl) in the solvent mixture dichloromethane/methylcyclohexane (DCM/MCH) at –78 °C. The effect of catalyst concentration [(iBu)3Al2Cl3] and various electron donors on the polymerization rat and molecular-weight characteristics of synthesized poly(β-pinenes) was investigated. Controlled cationic polymerization of β-pinene was carried out in the presence СumCl/Мe2AlCl initiating system. The polymers with controlled molecular weight up to 6400 g/mol and relatively low polydispersity (Mw/Mn < 1.42) were synthesized. Microstructure of synthesized poly(β-pinene) was investigated by 1H NMR spectroscopy.

Author Biographies

Maksim I. Hulnik, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus; Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus

postgraduate student at the faculty of chemistry, Belarusian State University, and junior researcher at the laboratory of catalysis of polymerization processes, Research Institute for Physical Chemical Problems, Belarusian State University

Olga V. Kuharenko, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus; Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus

student at the faculty of chemistry, Belarusian State University, and technician at the laboratory of catalysis of polymerization processes, Research Institute for Physical Chemical Problems, Belarusian State University

Sergei V. Kostjuk, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus

doctor of science (chemistry), docent; head of the department of high molecular weight compounds, faculty of chemistry, Belarusian State University, and head of the laboratory of catalysis of polymerization processes, Research Institute for Physical Chemical Problems, Belarusian State University

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Published
2020-08-25
Keywords: β-pinene, cationic polymerization, alkylaluminum chlorides, controlled cationic polymerization, electron donor, proton trap
Supporting Agencies This work was supported by the state program of scientific research «Chemical technologies and materials» (subprogram «Wood chemistry», project 4.1.12 «Synthesis of new polymer materials based on terpene monomers and rosin» (No. 20180174)).
How to Cite
Hulnik, M. I., Kuharenko, O. V., & Kostjuk, S. V. (2020). Cationic polymerization of β-pinene in the presence of alkylaluminum chlorides as catalysts. Journal of the Belarusian State University. Chemistry, 2, 98-107. https://doi.org/10.33581/2520-257X-2020-2-98-107