Kinetic behavior of the reaction between silica and epoxidized liquid rubber
Abstract The use of epoxidized rubber as compatibilizer in silica-filled rubber compounds has been proposed in literature. However, the investigation of the reaction kinetics between the epoxy groups and the hydroxyl groups at the silica surface is not yet described. It is a difficult task, mainly b...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Polímeros
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| Series: | Polímeros |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282016000400291&lng=en&tlng=en |
| _version_ | 1811262052203757568 |
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| author | Marcus Vinícius Braum Marly Antônia Maldaner Jacobi |
| author_facet | Marcus Vinícius Braum Marly Antônia Maldaner Jacobi |
| author_sort | Marcus Vinícius Braum |
| collection | DOAJ |
| description | Abstract The use of epoxidized rubber as compatibilizer in silica-filled rubber compounds has been proposed in literature. However, the investigation of the reaction kinetics between the epoxy groups and the hydroxyl groups at the silica surface is not yet described. It is a difficult task, mainly because of the high dilution of the system due the difficulty of incorporating high levels of silica in a matrix containing epoxidized rubbers of high molecular weight. In this work, a mixture of precipitated silica and an epoxidized liquid rubber (EpLHPB) was prepared and the reaction between silanols and epoxy groups was followed by DSC under isothermal conditions, at 150, 160 and 170 °C. An autocatalytic data treatment was applied to determine the kinetic parameters of the reaction. Furthermore, it was possible to estimate the amount of epoxy groups required for the saturation of the external surface of the silica, resulting in 5.4 epoxy groups/nm2. |
| first_indexed | 2024-04-12T19:17:02Z |
| format | Article |
| id | doaj.art-71d241df08954ad9b6336680f49b829c |
| institution | Directory Open Access Journal |
| issn | 1678-5169 |
| language | English |
| last_indexed | 2024-04-12T19:17:02Z |
| publisher | Associação Brasileira de Polímeros |
| record_format | Article |
| series | Polímeros |
| spelling | doaj.art-71d241df08954ad9b6336680f49b829c2022-12-22T03:19:42ZengAssociação Brasileira de PolímerosPolímeros1678-516926429129610.1590/0104-1428.2180S0104-14282016000400291Kinetic behavior of the reaction between silica and epoxidized liquid rubberMarcus Vinícius BraumMarly Antônia Maldaner JacobiAbstract The use of epoxidized rubber as compatibilizer in silica-filled rubber compounds has been proposed in literature. However, the investigation of the reaction kinetics between the epoxy groups and the hydroxyl groups at the silica surface is not yet described. It is a difficult task, mainly because of the high dilution of the system due the difficulty of incorporating high levels of silica in a matrix containing epoxidized rubbers of high molecular weight. In this work, a mixture of precipitated silica and an epoxidized liquid rubber (EpLHPB) was prepared and the reaction between silanols and epoxy groups was followed by DSC under isothermal conditions, at 150, 160 and 170 °C. An autocatalytic data treatment was applied to determine the kinetic parameters of the reaction. Furthermore, it was possible to estimate the amount of epoxy groups required for the saturation of the external surface of the silica, resulting in 5.4 epoxy groups/nm2.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282016000400291&lng=en&tlng=encompositesepoxidized rubberkineticssilanolssilica |
| spellingShingle | Marcus Vinícius Braum Marly Antônia Maldaner Jacobi Kinetic behavior of the reaction between silica and epoxidized liquid rubber Polímeros composites epoxidized rubber kinetics silanols silica |
| title | Kinetic behavior of the reaction between silica and epoxidized liquid rubber |
| title_full | Kinetic behavior of the reaction between silica and epoxidized liquid rubber |
| title_fullStr | Kinetic behavior of the reaction between silica and epoxidized liquid rubber |
| title_full_unstemmed | Kinetic behavior of the reaction between silica and epoxidized liquid rubber |
| title_short | Kinetic behavior of the reaction between silica and epoxidized liquid rubber |
| title_sort | kinetic behavior of the reaction between silica and epoxidized liquid rubber |
| topic | composites epoxidized rubber kinetics silanols silica |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282016000400291&lng=en&tlng=en |
| work_keys_str_mv | AT marcusviniciusbraum kineticbehaviorofthereactionbetweensilicaandepoxidizedliquidrubber AT marlyantoniamaldanerjacobi kineticbehaviorofthereactionbetweensilicaandepoxidizedliquidrubber |