Abstract
| Original language | English |
|---|---|
| Title of host publication | Proceedings ACS Rubber Division Fall Meeting |
| Place of Publication | Cleveland, USA |
| Publisher | ACS Rubber Division |
| Pages | 1-30 |
| Publication status | Published - 11 Oct 2011 |
| Event | 180th Technical Meeting ACS Rubber Division - Cleveland, United States Duration: 11 Oct 2011 → 13 Oct 2011 Conference number: 180 |
Publication series
| Name | #82 |
|---|---|
| Publisher | ACS Rubber Division |
| ISSN (Print) | 1547-1977 |
Conference
| Conference | 180th Technical Meeting ACS Rubber Division |
|---|---|
| Country | United States |
| City | Cleveland |
| Period | 11/10/11 → 13/10/11 |
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Keywords
- METIS-284223
- IR-87223
Cite this
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Pathway for high-quality reclaim by thermal treatment of sulfur-vulcanized SBR. / Saiwari, Sitisaiyidah; Dierkes, Wilma K.; Noordermeer, Jacobus W.M.
Proceedings ACS Rubber Division Fall Meeting. Cleveland, USA : ACS Rubber Division, 2011. p. 1-30 (#82).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic
TY - GEN
T1 - Pathway for high-quality reclaim by thermal treatment of sulfur-vulcanized SBR
AU - Saiwari, Sitisaiyidah
AU - Dierkes, Wilma K.
AU - Noordermeer, Jacobus W.M.
PY - 2011/10/11
Y1 - 2011/10/11
N2 - De-vulcanization of SBR (Styrene Butadiene Rubber) is a challenge, as the broken polymer chains tend to re-arrange. This influences the properties of the reclaimed and re-vulcanized rubber, and reduces the quality of the recycled material. Within this study, the breakdown of sulfur-cured SBR in a thermal de-vulcanization process is investigated under various conditions: The temperature range for the de-vulcanization is varied from 180 ºC to 300 ºC, and the treatments are done in air and under oxygen exclusion with nitrogen. Depending on the parameters used, the sol fraction increased as expected, crosslink density first decreased, but increased again above a temperature threshold of 220 ºC. The reasons for this increase in crosslink density are complicated intra-molecular rearrangements of chain fragments due to uncontrolled degradation and oxidation effects. This is confirmed by FT-IR and TGA measurements. Preventing oxidation during thermal treatment reduces the degree of rearrangements and results in significantly improved SBR reclaim properties.
AB - De-vulcanization of SBR (Styrene Butadiene Rubber) is a challenge, as the broken polymer chains tend to re-arrange. This influences the properties of the reclaimed and re-vulcanized rubber, and reduces the quality of the recycled material. Within this study, the breakdown of sulfur-cured SBR in a thermal de-vulcanization process is investigated under various conditions: The temperature range for the de-vulcanization is varied from 180 ºC to 300 ºC, and the treatments are done in air and under oxygen exclusion with nitrogen. Depending on the parameters used, the sol fraction increased as expected, crosslink density first decreased, but increased again above a temperature threshold of 220 ºC. The reasons for this increase in crosslink density are complicated intra-molecular rearrangements of chain fragments due to uncontrolled degradation and oxidation effects. This is confirmed by FT-IR and TGA measurements. Preventing oxidation during thermal treatment reduces the degree of rearrangements and results in significantly improved SBR reclaim properties.
KW - METIS-284223
KW - IR-87223
M3 - Conference contribution
T3 - #82
SP - 1
EP - 30
BT - Proceedings ACS Rubber Division Fall Meeting
PB - ACS Rubber Division
CY - Cleveland, USA
ER -