Synthesis and Characterization of PS-PIB-PS Triblock Copolymers

Storey, Robson F.; Chisholm, Bret J.; Choate, Kim R.

doi:10.1080/10601329409349773

Cited by 29 publications

(2 citation statements)

References 27 publications

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“…On the other hand, the late addition of styrene leads to contamination of block copolymer with polystyrene and polyisobutylene due to the low stability of living polyisobutylene chains under monomer-starved conditions [20,24]. It should be noted that synthesis of block copolymers of isobutylene and styrene, with very rare exceptions [25], was performed using TiCl 4 as a co-initiator, which requires using it in very high concentrations [1][2][3][4][15][16][17][18][19][20][21][22][23][24]26,27]. Another serious limitation of the known procedures of SIBS preparation is the invariable use of cumbersome glove box technique [1][2][3][4][15][16][17][18][19][20][21][22][23][24]26,27].…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that synthesis of block copolymers of isobutylene and styrene, with very rare exceptions [25], was performed using TiCl 4 as a co-initiator, which requires using it in very high concentrations [1][2][3][4][15][16][17][18][19][20][21][22][23][24]26,27]. Another serious limitation of the known procedures of SIBS preparation is the invariable use of cumbersome glove box technique [1][2][3][4][15][16][17][18][19][20][21][22][23][24]26,27]. However, Ivan et al reported that living cationic polymerization of isobutylene using DiCumOH/TiCl 4 /DTBP initiating system could be successfully conducted in open air (laboratory hoods).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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Star-block polymers of multiple polystyrene-b-polyisobutylene arms radiating from a polydivinylbenzene core

Asthana

Kennedy

1999

J. Polym. Sci. A Polym. Chem.

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Copolymers

Leiza¹,

Asúa²

2002

Kirk-Othmer Encyclopedia of Chemical Technology

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The preparation, properties, use, and characterization of synthetic copolymers is reviewed and future trends are discussed. The different copolymer structures are detailed and the nomenclature is explained. The copolymerization reactions (free radical including controlled free radical, anionic, cationic, ring‐opening, catalytic, and step growth) are discussed emphasizing the copolymer structures attainable through each polymerization mechanism. Industrially important random, alternating, block, graft, star, and hyperbranched copolymers are discussed in terms of the processes used to produce them and the properties achieved. Their main uses and trade names are also detailed. Future trends are discussed.

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Synthesis and Characterization of PS-PIB-PS Triblock Copolymers

Cited by 29 publications

References 27 publications

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

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

Star-block polymers of multiple polystyrene-b-polyisobutylene arms radiating from a polydivinylbenzene core

Copolymers

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