Polymerisation Kinetics and Molecular Characteristics of “Lithium” Polybutadiene: Influence of Monomer Concentration and Initiating System

Akhmetov, I.G.; Boreiko, N.P.; Burganov, R. T.; Glukhovskoi, V.S.; Kalashnikova, O.A.; Козлов, В. Г.; Салахов, И. И.; Зиганшина, Э. Ф.

doi:10.1177/0307174x1003700602

Cited by 1 publication

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“…Preliminary results of experiments showed that most optimal is an AMD:NBL molar ratio of 1:1, which ensures a high rate of the copolymerisation process and the production of a copolymer with the required molecular weight characteristics and microstructure. An analysis of the molecular weight characteristics of s-SBR specimens synthesised with the given molar ratio ( Table 1) makes it possible to establish that a reduction in the concentration of initiating system leads to a regular increase in the average molecular weights, while increase in the monomer conversion is accompanied with a practically linear increase in the number-average molecular weight (M n ), which is characteristic of anionic processes of polymerisation [13]. It must also be pointed out that increase in the monomer:NBL molar ratio leads to a certain increase in polydispersity.…”

Section: The Influence Of the Concentration Of An Initiating System Cmentioning

confidence: 99%

The Influence of the Concentration of an ‘n-butyllithium–amine-containing Modifier’ Initiating System on the Copolymerisation of 1,3-butadiene and Styrene

Vagizov

Khusainova

Akhmetov

et al. 2017

International Polymer Science and Technology

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The influence of the concentration of an initiating system consisting of n-butyllithium and an amine-containing modifier on the copolymerisation of 1,3-butadiene and styrene in a hexane solvent was studied. The molecular characteristics and the microstructure of specimens of the obtained solution-polymerised styrene butadiene rubber (s-SBR) were determined by gel permeation chromatography on a Breeze liquid chromatograph (Waters) and by IR spectroscopy on a Spectrum GX 100 spectrometer (PerkinElmer) in accordance with ISO 21561/2. It was shown that a reduction in the amount of the initiating system is accompanied with a reduction in the copolymerisation rate and in the monomer conversion, and also with an increase in the average molecular weights of the copolymer. It was established that a reduction in the initiating system concentration in the reaction medium leads to a reduction in the content of 1,2-units in the rubber. A comparative analysis of data for rubber compounds based on the synthesised s-SBR and data for rubber compounds based on standard rubber indicates that their mechanical properties are at the same level. However, the tg δ at 60°C (determined on an RPA 2000 instrument) for rubber compounds based on a trial specimen has a lower value, which will make it possible to produce tyre rubbers providing a lower tyre rolling resistance.

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Section: The Influence Of the Concentration Of An Initiating System Cmentioning

confidence: 99%

The Influence of the Concentration of an ‘n-butyllithium–amine-containing Modifier’ Initiating System on the Copolymerisation of 1,3-butadiene and Styrene

Vagizov

Khusainova

Akhmetov

et al. 2017

International Polymer Science and Technology

Self Cite

View full text Add to dashboard Cite

show abstract

Polymerisation Kinetics and Molecular Characteristics of “Lithium” Polybutadiene: Influence of Monomer Concentration and Initiating System

Cited by 1 publication

References 2 publications

The Influence of the Concentration of an ‘n-butyllithium–amine-containing Modifier’ Initiating System on the Copolymerisation of 1,3-butadiene and Styrene

The Influence of the Concentration of an ‘n-butyllithium–amine-containing Modifier’ Initiating System on the Copolymerisation of 1,3-butadiene and Styrene

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