EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS

Serhat Gündüz; Yavuz Sar; Kaan Çaktı

doi:10.18038/estubtda.812660

TR EN

EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS

Abstract

Gel permeation chromatography (GPC), nuclear magnetic resonance (NMR) spectroscopy, and elemental analysis techniques were used to study the molecular characteristics of six commercially available styrene-butadiene-styrene (SBS) block copolymers which are mostly used for modifying bitumen. The cis-1,4, trans-1,4, and 1,2-vinyl units in the polybutadiene (PB) parts and the styrene contents of the SBS block copolymers were investigated by means of 1H-NMR spectra. In addition carbon and hydrogen contents were estimated using 1H-NMR measurements. These estimated values were confirmed using the results of elemental analysis (EA). The glass transition temperatures (Tg) of SBS block copolymers were obtained using differential scanning calorimetry (DSC). The SBS block copolymers used in this study have different structural properties such as molecular weight and linearity. However, it is observed that the Tg-onset values are directly proportional to the percentage of the 1,2-vinyl units and inversely proportional to the percentage of the trans-1,4 units in the SBS block copolymers.

Keywords

SBS,, Block copolymers, GPC,, NMR, Glass trantision temperature

EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS

Abstract

Gel permeation chromatography (GPC), nuclear magnetic resonance (NMR) spectroscopy, and elemental analysis techniques were used to study the molecular characteristics of six commercially available styrene-butadiene-styrene (SBS) block copolymers which are mostly used for modifying bitumen. The cis-1,4, trans-1,4, and 1,2-vinyl units in the polybutadiene (PB) parts and the styrene contents of the SBS block copolymers were investigated by means of 1H-NMR spectra. In addition carbon and hydrogen contents were estimated using 1H-NMR measurements. These estimated values were confirmed using the results of elemental analysis (EA). The glass transition temperatures (Tg) of SBS block copolymers were obtained using differential scanning calorimetry (DSC). The SBS block copolymers used in this study have different structural properties such as molecular weight and linearity. However, it is observed that the Tg-onset values are directly proportional to the percentage of the 1,2-vinyl units and inversely proportional to the percentage of the trans-1,4 units in the SBS block copolymers.

Keywords

SBS, block copolymers, DSC, NMR, glass transition temperature

Supporting Institution

İstanbul Teknik İnşaat Sanayi ve Ticaret A.Ş.

Thanks

The financial support of İstanbul Teknik Insaat Sanayi ve Ticaret A.S. is gratefully acknowledged.

References

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Details

Primary Language

English

Subjects

-

Journal Section

Research Article

Authors

Serhat Gündüz ^*
0000-0002-4106-4401
Türkiye

Yavuz Sar This is me
0000-0002-4858-678X
Türkiye

Kaan Çaktı This is me
0000-0002-2631-891X
Türkiye

Publication Date

March 26, 2021

Submission Date

October 19, 2020

Acceptance Date

February 27, 2021

Published in Issue

Year 2021 Volume: 22 Number: 1

DOI

https://doi.org/10.18038/estubtda.812660

IZ

https://izlik.org/JA43UT29MW

APA

Gündüz, S., Sar, Y., & Çaktı, K. (2021). EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, 22(1), 45-54. https://doi.org/10.18038/estubtda.812660

AMA

1.Gündüz S, Sar Y, Çaktı K. EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS. Estuscience - Se. 2021;22(1):45-54. doi:10.18038/estubtda.812660

Chicago

Gündüz, Serhat, Yavuz Sar, and Kaan Çaktı. 2021. “EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 22 (1): 45-54. https://doi.org/10.18038/estubtda.812660.

EndNote

Gündüz S, Sar Y, Çaktı K (March 1, 2021) EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 22 1 45–54.

IEEE

[1]S. Gündüz, Y. Sar, and K. Çaktı, “EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS”, Estuscience - Se, vol. 22, no. 1, pp. 45–54, Mar. 2021, doi: 10.18038/estubtda.812660.

ISNAD

Gündüz, Serhat - Sar, Yavuz - Çaktı, Kaan. “EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 22/1 (March 1, 2021): 45-54. https://doi.org/10.18038/estubtda.812660.

JAMA

1.Gündüz S, Sar Y, Çaktı K. EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS. Estuscience - Se. 2021;22:45–54.

MLA

Gündüz, Serhat, et al. “EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, vol. 22, no. 1, Mar. 2021, pp. 45-54, doi:10.18038/estubtda.812660.

Vancouver

1.Serhat Gündüz, Yavuz Sar, Kaan Çaktı. EFFECT OF POLYBUTADIENE COMPOSITION ON THE GLASS TRANSITION TEMPERATURE OF SBS BLOCK COPOLYMERS. Estuscience - Se. 2021 Mar. 1;22(1):45-54. doi:10.18038/estubtda.812660

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