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Aspects of the Synthesis of Poly(styrene-block-isobutylene-block-styrene) by TiCl4-Co-initiated Cationic Polymerization in Open Conditions

1
Research Institute for Physical Chemical Problems of the Belarusian State University, 220006 Minsk, Belarus
2
Faculty of Chemistry, Belarusian State University, 220006 Minsk, Belarus
3
Research Institute for Complex Issues of Cardiovascular Diseases, 650002 Kemerovo, Russia
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Alexander Butlerov Institute of Chemistry, Kazan Federal University, 420008 Kazan, Russia
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Arbuzov Institute of Organic and Physical Chemistry, Federal Research Center of the Russian Academy of Sciences, 420088 Kazan, Russia
6
Institute of Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Pradip K. Bhowmik
Received: 20 August 2021 / Revised: 3 September 2021 / Accepted: 4 September 2021 / Published: 1 October 2021
The cationic polymerization of isobutylene and its block copolymerization with styrene using DiCumCl/TiCl4/2,6-lutidine initiating system has been studied in open conditions. It was shown that a higher concentration of proton trap is required in open conditions as compared to the glove box technique in order to have good control over molecular weight and polydispersity. Polyisobutylenes with Mn ≤ 50,000 g mol−1 and low polydispersity (Đ ≤ 1.2) were prepared at [Lu] = 12 mM. The synthesis of poly(styrene-block-isobutylene-block-styrene) triblock copolymer (SIBS) in open conditions required the addition of proton trap into two steps, half at the beginning of the reaction and the second half together with styrene. Following this protocol, a series of triblock copolymers with different length of central polyisobutylene block (from Mn = 20,000 g mol−1 to 50,000 g mol−1) and side polystyrene blocks (Mn = 4000 g mol−1–9000 g mol−1) with low polydispersity (Đ ≤ 1.25) were synthesized. High molecular SIBS (Mn > 50,000 g mol−1) with low polydispersity (Đ < 1.3) containing longer polystyrene blocks (Mn > 6000 g mol−1) demonstrated higher tensile strength (~13.5 MPa). View Full-Text
Keywords: cationic polymerization; living polymerization; isobutylene; styrene; polyisobutylene; poly(styrene-block-isobutylene-block-styrene) cationic polymerization; living polymerization; isobutylene; styrene; polyisobutylene; poly(styrene-block-isobutylene-block-styrene)
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MDPI and ACS Style

Makarevich, M.I.; Nikishau, P.A.; Berezianko, I.A.; Glushkova, T.V.; Rezvova, M.A.; Ovcharenko, E.A.; Bekmukhamedov, G.E.; Yakhvarov, D.G.; Kostjuk, S.V. Aspects of the Synthesis of Poly(styrene-block-isobutylene-block-styrene) by TiCl4-Co-initiated Cationic Polymerization in Open Conditions. Macromol 2021, 1, 243-255. https://0-doi-org.brum.beds.ac.uk/10.3390/macromol1040017

AMA Style

Makarevich MI, Nikishau PA, Berezianko IA, Glushkova TV, Rezvova MA, Ovcharenko EA, Bekmukhamedov GE, Yakhvarov DG, Kostjuk SV. Aspects of the Synthesis of Poly(styrene-block-isobutylene-block-styrene) by TiCl4-Co-initiated Cationic Polymerization in Open Conditions. Macromol. 2021; 1(4):243-255. https://0-doi-org.brum.beds.ac.uk/10.3390/macromol1040017

Chicago/Turabian Style

Makarevich, Miraslau I., Pavel A. Nikishau, Ivan A. Berezianko, Tatiana V. Glushkova, Maria A. Rezvova, Evgeny A. Ovcharenko, Giyjaz E. Bekmukhamedov, Dmitry G. Yakhvarov, and Sergei V. Kostjuk 2021. "Aspects of the Synthesis of Poly(styrene-block-isobutylene-block-styrene) by TiCl4-Co-initiated Cationic Polymerization in Open Conditions" Macromol 1, no. 4: 243-255. https://0-doi-org.brum.beds.ac.uk/10.3390/macromol1040017

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