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Effects of sulfur vulcanization system on cure characteristics, physical properties and thermal aging of epoxidized natural rubber |
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| รหัสดีโอไอ | |
| Creator | Anyaporn BOONMAHITTHISUD |
| Title | Effects of sulfur vulcanization system on cure characteristics, physical properties and thermal aging of epoxidized natural rubber |
| Contributor | Amnouy LARPKASEMSUK, Laksamon RAKSAKSRI, Saowaroj CHUAYJULJIT, Phasawat CHAIWUTTHINAN |
| Publisher | Metallurgy and Materials Science Research Institute, Chulalongkorn University |
| Publication Year | 2562 |
| Journal Title | Journal of Metals, Materials and Minerals |
| Journal Vol. | 29 |
| Journal No. | 1 |
| Page no. | 49-57 |
| Keyword | Epoxide natural rubber, In situ epoxidation, Sulfur vulcanization systems, Tetrabenzylthiuram disulphide |
| URL Website | http://ojs.materialsconnex.com/index.php/jmmm/index |
| Website title | Journal of Metals, Materials and Minerals |
| ISSN | 08576149;26300508 |
| Abstract | The epoxidized natural rubber (ENR) with 40 mol% epoxidation (ENR-40) wasinitially prepared via 'in situ' epoxidation of concentrated natural rubber latex withformic acid (1M to isoprene unit) and hydrogen peroxide (0.75 M to isoprene unit)at 50บC for 8 h. The as-prepared ENR-40 was then cured with three different sulfurvulcanization/curing systems, including conventional (CV), semi-efficiency (semiEV) and efficiency (EV) systems using tetrabenzylthiuram disulphide (TBzTD) as anon-carcinogenic accelerator on a compression molding machine. The effects ofsulfur to accelerator ratio on the cure characteristics, tensile properties (tensilestrength, modulus at 300% strain (M300) and elongation at break), thermal aging,thermal stability and oil resistance were investigated. The results revealed that theEV system exhibited the longest scorch time (ts2) and cure time (t90) and the highestelongation at break (both before and after thermal aging), but the lowest crosslinkdensity. The CV system had the highest crosslink density, tensile strength and M300(both before and after thermal aging) and oil resistance, but the lowest thermalstability. Moreover, the semi-EV system exhibited the highest cure rate and thermalstability, but the lowest ts2, t90 and elongation at break (both before and after thermalaging). |
