The Influence of Molecular Weight Distribution of Solution-Polymerised Styrene Butadiene Rubber on the Properties of Rubber Mixes and Vulcanisates

Borisenko, V. N.; Akhmetov, I.G.; Galimov, R. R.; Сахабутдинов, А. Г.

doi:10.1177/0307174x1604300502

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Previous studies reported that high‐molecular‐weight SBR exhibits high T min (minimum torque) and T max (maximum torque) values . Moreover, high T max values were observed for SBR with narrow MWD (in which case a relatively uniform vulcanization network is formed) and high crosslink density . Herein, RAFT ESBR exhibited lower T min , T max , and T max – T min (Δ torque ) values than those of ESBR 1502.…”

Section: Resultsmentioning

confidence: 73%

“…Mooney viscosity is a measure of processability. In general, when the MWD of a polymer is narrowed at constant weight‐average molecular weight ( M w ), the amount of low‐molecular‐weight chains is reduced, which increases the Mooney viscosity and decreases the processability . However, the Mooney viscosity of RAFT ESBR [ML 1 + 4 (100°C) was around 24, and the value of 36 for ESBR 1502] was low in view of its narrow MWD, confirming the excellent processability of this polymer.…”

Section: Resultsmentioning

confidence: 97%

“…On the other hand, the nature of anionic polymerization allows easy MWD control, and the produced SSBR exhibits a narrow MWD, which has several advantages. According to Borisenko et al ., although narrow‐MWD SBR exhibits decreased processability, the reduced hysteresis loss results in improved thermal/abrasion resistance and dynamic viscoelastic characteristics . Based on the results of the above studies, SSBR with a narrow MWD and low RR is mainly used.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of emulsion styrene butadiene rubber by reversible addition–fragmentation chain transfer polymerization and its properties

Mun

Hwang

Kim

2018

J of Applied Polymer Sci

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Emulsion polymerization is generally used to synthesize styrene butadiene rubber (SBR), and the molecular weight of this rubber can be easily increased. However, the broad molecular weight distribution (MWD) of SBR increases energy loss and adversely affects the dynamic viscoelastic properties. To overcome this disadvantage, reversible addition-fragmentation chain transfer (RAFT) polymerization, which is a type of living polymerization, is applied to emulsion polymerization for preparing RAFT emulsion SBR (ESBR). The molecular weight and microstructure of RAFT ESBR are compared to those of commercially available ESBR 1502 by gel permeation chromatography and proton nuclear magnetic resonance spectroscopy. The aforementioned two polymers are used to prepare unfilled ESBR compounds, which are compared in terms of key physical properties (abrasion resistance, mechanical properties, and dynamic viscoelastic properties). It is confirmed that various physical properties of RAFT ESBR are improved due to its narrow MWD.

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Section: Resultsmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of emulsion styrene butadiene rubber by reversible addition–fragmentation chain transfer polymerization and its properties

Mun

Hwang

Kim

2018

J of Applied Polymer Sci

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Effect of Reversible Addition-Fragmentation Chain Transfer Emulsion Styrene–butadiene Rubber on the Properties of Silica Compounds

Mun

Hwang

Kwag

et al. 2020

Rubber Chemistry and Technology

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In recent years, solution styrene–butadiene rubber (SSBR), which has a narrow molecular weight distribution, controllable microstructure, and chain end functionality, is mainly used as base rubber for passenger car tire tread compounds. However, SSBR has a lower molecular weight than that of emulsion SBR (ESBR) because it is difficult to increase the molecular weight of SSBR. In contrast, ESBR can easily increase the molecular weight; however, it has a broad molecular weight distribution. The reversible addition-fragmentation chain transfer (RAFT) polymerization technique is applicable to the emulsion polymerization. Polymers with narrow molecular weight distributions can be obtained by the RAFT polymerization because the RAFT agent prevents the coupling reaction of the growing chain radicals. In this case, ESBR having a narrow molecular weight distribution, which is an advantage of SSBR, and a high molecular weight, which is an advantage of ESBR, can be synthesized. Therefore, we synthesized RAFT ESBR and fabricated its compounds with silica filler. We confirmed that the physical properties of the RAFT ESBR silica compound are different from those of the ESBR silica compound. In addition to the narrow molecular weight distribution of the RAFT ESBR, the trithiocarbonyl group of the RAFT agent in the RAFT ESBR chain molecules affects the physical properties.

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The Influence of Molecular Weight Distribution of Solution-Polymerised Styrene Butadiene Rubber on the Properties of Rubber Mixes and Vulcanisates

Cited by 2 publications

References 4 publications

Synthesis of emulsion styrene butadiene rubber by reversible addition–fragmentation chain transfer polymerization and its properties

Synthesis of emulsion styrene butadiene rubber by reversible addition–fragmentation chain transfer polymerization and its properties

Effect of Reversible Addition-Fragmentation Chain Transfer Emulsion Styrene–butadiene Rubber on the Properties of Silica Compounds

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