Citation
Abu Amu, . and Sidek Dulngali, . Easy processing epoxidised natural rubber. pp. 119-132. ISSN 0127-7065
Abstract
The latest production technique in the preparation of epoxidised natural rubber (ENR) has resulted in a promising new form of ENR which can be easily processed in large internal mixers. The new samples of ENR (ENR 25 and ENR 50 i.e. ENR containing 25 and 50 mole per cent of epoxidation respectively) are characterised by their significantly low gel contents and high basic nature. The commercial production of this new form of ENR by Kumpulan Guthrie Sendirian Berhad (KGSB) is anticipated in 1989. The mill-sticking problem which was encountered when mixing ENR on small laboratory mills at high temperatures can now be avoided. The method of solving the problem involves a partial sulphur crosslinking that enhances the cohesive strength of the ENR. This improvement in the cohesive strength of ENR coupled with the incorporation of additional level of stearic acid prevents the rubber from sticking to the two-roll mill. It is to be noted that the results obtained from this study were based on small laboratory mills where high shear is created during the milling process. The results obtained may not be related to commercial operations where the magnitude of the shearing force is different from that based on small-scale operations.
Download File
Full text available from:
Official URL: http://vitaldoc.lgm.gov.my:8060/vital/access/servi...
|
Abstract
The latest production technique in the preparation of epoxidised natural rubber (ENR) has resulted in a promising new form of ENR which can be easily processed in large internal mixers. The new samples of ENR (ENR 25 and ENR 50 i.e. ENR containing 25 and 50 mole per cent of epoxidation respectively) are characterised by their significantly low gel contents and high basic nature. The commercial production of this new form of ENR by Kumpulan Guthrie Sendirian Berhad (KGSB) is anticipated in 1989. The mill-sticking problem which was encountered when mixing ENR on small laboratory mills at high temperatures can now be avoided. The method of solving the problem involves a partial sulphur crosslinking that enhances the cohesive strength of the ENR. This improvement in the cohesive strength of ENR coupled with the incorporation of additional level of stearic acid prevents the rubber from sticking to the two-roll mill. It is to be noted that the results obtained from this study were based on small laboratory mills where high shear is created during the milling process. The results obtained may not be related to commercial operations where the magnitude of the shearing force is different from that based on small-scale operations.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Natural rubber |
| AGROVOC Term: | Epoxides |
| AGROVOC Term: | Processing |
| AGROVOC Term: | Mastication |
| AGROVOC Term: | Vulcanization |
| AGROVOC Term: | Mixing |
| AGROVOC Term: | High temperature |
| AGROVOC Term: | Milling |
| AGROVOC Term: | Small scale enterprises |
| AGROVOC Term: | Viscosity |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 04:44 |
| URI: | http://webagris.upm.edu.my/id/eprint/23525 |
Actions (login required)
 |
View Item |
