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Preparation and Characterization of Epoxidized Natural Rubber and Epoxidized Natural Rubber/Carboxylated Styrene Butadiene Rubber Blends |
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| รหัสดีโอไอ | |
| Creator | Saowaroj CHUAYJULJIT,Thongchai NUTCHAPONG,Onusa SARAVARI,Anyaporn BOONMAHITTHISUD |
| Title | Preparation and Characterization of Epoxidized Natural Rubber and Epoxidized Natural Rubber/Carboxylated Styrene Butadiene Rubber Blends |
| Publisher | Metallurgy and Materials Science Research Institute, Chulalongkorn University |
| Publication Year | 2558 |
| Journal Title | Journal of Metals, Materials and Minerals |
| Journal Vol. | 25 |
| Journal No. | 1 |
| Page no. | 27-36 |
| Keyword | Epoxidized natural rubber,Carboxylated styrene butadiene rubber,Rubber blend,Physical properties,Oil resistance |
| ISSN | 8576149 |
| Abstract | In this study, epoxidized natural rubber (ENR) with 30 mol% epoxidation (ENR-30) was first prepared from natural rubber (NR) latex via 'in situ' performic epoxidation using 0.5 M hydrogen peroxide and 0.75 M formic acid at 50?C for 4 hours. The prepared ENR-30 was blended with three different loadings of carboxylated styrene butadiene rubber (XSBR) (10, 20 and 30 wt%) in the latex stage. All ENR-30/XSBR blends had longer scorch time and cure time than neat ENR-30 as examined on a moving die rheometer. The tensile properties (tensile strength, modulus at 300% strain and elongation at break), thermal stability and oil resistance of the ENR-30/XSBR blends were investigated. The incorporation of XSBR into ENR-30 caused an increase in the modulus at 300% strain but deteriorated the tensile strength and elongation at break. However, the elongation at break of the blends was still high (540-630%) as compared to that of the neat ENR-30 (690%). The results from the thermal gravimetric analysis revealed an increased initial degradation temperature but a decreased thermal stability at high temperatures. The oil resistance of ENR-30 and ENR-30/XSBR blends in terms of the percentage volume change after immersion in the ASTM Oil No.1 and IRM 903 oil was better than that of the NR. |
