Citation
Samsidar Hamzah, . and Gomez J. B., . and Rama Rao P. S., . Ultrastructure of rubber particles in PA 80 latex. I. Changes during sulphur vulcanisation reaction. pp. 118-128. ISSN 0127-7065
Abstract
Latex withdrawn during the various processing stages of sulphur vulcanisation was examined using two types of fixatives: standard osmium tetroxide (OsO4) and potassium permanganate (KMnO4). Observations indicated that samples fixed in 5 KMnO4 for 15 min showed ultra-structural changes in the rubber particles during vulcanisation especially when sections were post-stained with OsO4 vapour. As the process of vulcanisation proceeds the internal stainable material (grain-like appearance) indicating the unoxidised portion of the particle is increased. In a mixture of 80:20 of the vulcanised to unvulcanised latex i.e. PA 80 these two types of particles could be readily differentiated by the trained eye. The distinction appears in the degree of oxidation of the interior of the unvulcanised particles being greater than in vulcanised latex particles.
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Abstract
Latex withdrawn during the various processing stages of sulphur vulcanisation was examined using two types of fixatives: standard osmium tetroxide (OsO4) and potassium permanganate (KMnO4). Observations indicated that samples fixed in 5 KMnO4 for 15 min showed ultra-structural changes in the rubber particles during vulcanisation especially when sections were post-stained with OsO4 vapour. As the process of vulcanisation proceeds the internal stainable material (grain-like appearance) indicating the unoxidised portion of the particle is increased. In a mixture of 80:20 of the vulcanised to unvulcanised latex i.e. PA 80 these two types of particles could be readily differentiated by the trained eye. The distinction appears in the degree of oxidation of the interior of the unvulcanised particles being greater than in vulcanised latex particles.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Rubber |
| AGROVOC Term: | Latex |
| AGROVOC Term: | Vulcanization |
| AGROVOC Term: | Sulphur |
| AGROVOC Term: | Potassium permanganate |
| AGROVOC Term: | Dehydration (treatment) |
| AGROVOC Term: | Ethanol |
| AGROVOC Term: | Electron microscopy |
| AGROVOC Term: | Blending |
| AGROVOC Term: | Cell ultrastructure |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 05:15 |
| URI: | http://webagris.upm.edu.my/id/eprint/23578 |
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