Dependence of the network structure of cured styrene butadiene rubber on the sulphur content
An investigation about the dependence of the physical properties of styrene-butadiene rubber copolymers (cured with different sulphur content, in order to obtain various networks) on the crosslink density was carried out by means of dynamical mechanical analysis, differential scanning calorimetry an...
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2004
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00323861_v45_n17_p6037_Salgueiro http://hdl.handle.net/20.500.12110/paper_00323861_v45_n17_p6037_Salgueiro |
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paper:paper_00323861_v45_n17_p6037_Salgueiro2023-06-08T15:00:11Z Dependence of the network structure of cured styrene butadiene rubber on the sulphur content Free volume Nanohole SBR copolymer Copolymers Crosslinking Differential scanning calorimetry Glass transition Polysulfides Positron annihilation spectroscopy Dynamical mechanical analysis Nanoholes Positron annihilation lifetime spectroscopy Styrene 1,3 butadiene copolymer rubber styrene derivative sulfur article chemical analysis chemical structure cross linking density differential scanning calorimetry dynamics glass transition temperature positron spectroscopy polymer science An investigation about the dependence of the physical properties of styrene-butadiene rubber copolymers (cured with different sulphur content, in order to obtain various networks) on the crosslink density was carried out by means of dynamical mechanical analysis, differential scanning calorimetry and positron annihilation lifetime spectroscopy. SBR specimens were cured with different sulphur content, in order to obtain various networks. On increasing the crosslink density, the glass transition temperature increases and the fractional free volume decreases. The thermal expansion coefficient of the free volume decreases in the rubbery phase by increasing the crosslink density, owing to the slower rate of expansion of nanoholes; furthermore, it seems influenced by the percentage of polysulfide density. The density of nanoholes is independent of the temperature, but decreases on adding sulphur. The results can be framed within the Simha-Somcynsky free volume theory. © 2004 Published by Elsevier Ltd. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00323861_v45_n17_p6037_Salgueiro http://hdl.handle.net/20.500.12110/paper_00323861_v45_n17_p6037_Salgueiro |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Free volume Nanohole SBR copolymer Copolymers Crosslinking Differential scanning calorimetry Glass transition Polysulfides Positron annihilation spectroscopy Dynamical mechanical analysis Nanoholes Positron annihilation lifetime spectroscopy Styrene 1,3 butadiene copolymer rubber styrene derivative sulfur article chemical analysis chemical structure cross linking density differential scanning calorimetry dynamics glass transition temperature positron spectroscopy polymer science |
| spellingShingle |
Free volume Nanohole SBR copolymer Copolymers Crosslinking Differential scanning calorimetry Glass transition Polysulfides Positron annihilation spectroscopy Dynamical mechanical analysis Nanoholes Positron annihilation lifetime spectroscopy Styrene 1,3 butadiene copolymer rubber styrene derivative sulfur article chemical analysis chemical structure cross linking density differential scanning calorimetry dynamics glass transition temperature positron spectroscopy polymer science Dependence of the network structure of cured styrene butadiene rubber on the sulphur content |
| topic_facet |
Free volume Nanohole SBR copolymer Copolymers Crosslinking Differential scanning calorimetry Glass transition Polysulfides Positron annihilation spectroscopy Dynamical mechanical analysis Nanoholes Positron annihilation lifetime spectroscopy Styrene 1,3 butadiene copolymer rubber styrene derivative sulfur article chemical analysis chemical structure cross linking density differential scanning calorimetry dynamics glass transition temperature positron spectroscopy polymer science |
| description |
An investigation about the dependence of the physical properties of styrene-butadiene rubber copolymers (cured with different sulphur content, in order to obtain various networks) on the crosslink density was carried out by means of dynamical mechanical analysis, differential scanning calorimetry and positron annihilation lifetime spectroscopy. SBR specimens were cured with different sulphur content, in order to obtain various networks. On increasing the crosslink density, the glass transition temperature increases and the fractional free volume decreases. The thermal expansion coefficient of the free volume decreases in the rubbery phase by increasing the crosslink density, owing to the slower rate of expansion of nanoholes; furthermore, it seems influenced by the percentage of polysulfide density. The density of nanoholes is independent of the temperature, but decreases on adding sulphur. The results can be framed within the Simha-Somcynsky free volume theory. © 2004 Published by Elsevier Ltd. |
| title |
Dependence of the network structure of cured styrene butadiene rubber on the sulphur content |
| title_short |
Dependence of the network structure of cured styrene butadiene rubber on the sulphur content |
| title_full |
Dependence of the network structure of cured styrene butadiene rubber on the sulphur content |
| title_fullStr |
Dependence of the network structure of cured styrene butadiene rubber on the sulphur content |
| title_full_unstemmed |
Dependence of the network structure of cured styrene butadiene rubber on the sulphur content |
| title_sort |
dependence of the network structure of cured styrene butadiene rubber on the sulphur content |
| publishDate |
2004 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00323861_v45_n17_p6037_Salgueiro http://hdl.handle.net/20.500.12110/paper_00323861_v45_n17_p6037_Salgueiro |
| _version_ |
1768545821817569280 |