Investigation of the relaxation properties of butadiene-styrene block copolymers

The influence of the presence of uncoupled polystyrene-block-polybutadiene (SB) diblock chains to polystyrene-block-polybutadiene-block-polystyrene (SBS) triblock copolymers on the mechanical properties of the latter has been studied by means of tensile testing and dynamic mechanical analysis preparing several lamellae forming SBS/ SB blends through solution casting. The microphase-separated morphology of the samples was investigated by transmission electron microscopy. Both large strain deformation tensile deformation behaviour and viscoelastic properties of the SBS block copolymers were found to be affected appreciably by the presence of uncoupled SB diblock. The storage modulus of linear SBS was found to drop more sharply in the plateau region than for the radial SBS at the same SB content. At low SB content (up to 20 wt.-% for linear SBS and still higher for radial one), the overall tensile properties was not negatively influenced. On the whole, star block copolymers were found to be less sensitive towards the presence of diblock.DOI: http://dx.doi.org/10.3126/njst.v12i0.6493 Nepal Journal of Science and Technology 12 (2011) 149-156

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Morphology of pyrolysed polystyrene-isoprene-styrene and polystyrene-butadiene-styrene block copolymers

Journal of Applied Polymer Science ◽

10.1002/app.22870 ◽

2005 ◽

Vol 99 (5) ◽

pp. 2549-2553

Author(s):

B. D. Sarwade ◽

R. R. Sanghavi ◽

D. B. Sarwade ◽

S. N. Asthana

Keyword(s):

Block Copolymers ◽

Butadiene Styrene

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Magnetic Properties of Barium Ferrite Dispersed Within Polystyrene-Butadiene-Styrene Block Copolymers

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2009.ns50 ◽

2009 ◽

Vol 9 (6) ◽

pp. 3678-3683 ◽

Cited By ~ 1

Author(s):

M. Chipara ◽

R. Skomski ◽

N. Ali ◽

D. Hui ◽

D. J. Sellmyer

Keyword(s):

Magnetic Properties ◽

Block Copolymers ◽

Barium Ferrite ◽

Butadiene Styrene

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The Results of the Compromise Task Solution Directed for Development of Polymer-Modified Binder

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.899.67 ◽

2021 ◽

Vol 899 ◽

pp. 67-72

Author(s):

V.D. Polonik ◽

A.S. Kukleva ◽

N.D. Avdeev ◽

M.D. Shlyaptseva ◽

Vadim G. Nikol'skii ◽

...

Keyword(s):

Block Copolymers ◽

Softening Point ◽

Mutual Influence ◽

Brittleness Temperature ◽

Styrene Butadiene Styrene ◽

Modified Binder ◽

Styrene Butadiene ◽

Butadiene Styrene

This work presents the results of optimization compositions of polymer-modified binder (PMB) by a compromise task. The conducted study of influence two prescription factors – containing styrene-butadiene-styrene and sulfur – on which is a set of indicators of polymer-bitumen binders were carried out. The regularities of these factors of mutual influence were established by such indicators as the Fraas brittleness temperature, penetration, softening point, ductility. The dosages of SBS and sulfur have been determined by ensuring the achievement of the required level of PBB indicators in accordance with GOST R 52056-2003 «Bitumen-polymer road binders are based on styrene-butadiene-styrene block copolymers. Specifications».

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The Properties of a Styrene Butadiene Block Copolymer with a High Styrene Content

International Polymer Science and Technology ◽

10.1177/0307174x1404101009 ◽

2014 ◽

Vol 41 (10) ◽

pp. 45-50

Author(s):

A.A. Alekseev ◽

A.V. Lobanov ◽

V.S. Osipchik ◽

V.S. Glukhovskoi ◽

V.M. Aristov ◽

...

Keyword(s):

Block Copolymer ◽

Block Copolymers ◽

Absorption Band ◽

Ir Spectra ◽

Structure And Properties ◽

Styrene Content ◽

Styrene Butadiene ◽

Butadiene Styrene

The structure and properties of block copolymers (BCPs) of styrene and butadiene of grade StiroTEP-70 (styrene:butadiene = 70:30, Mw/Mn = 1.43–1.45) are discussed. Analysis of IR spectra enables the BCP to be treated as polystyrene-stat-copoly(butadiene/styrene/1,2-butadiene)-polystyrene. It is suggested that the absorption band at 542 cm-1 be considered as characteristic when identifying polymers with extensive polystyrene phases. At temperatures of 190–230°C, the BCP is partially crosslinked, and at 260°C it breaks down. The BCP is processed well at temperatures up to 200°C.

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