Citation
Sylla X., . and Achi A. Koman, . and Don A. Allet, . and Bonfils F., . and Beuve J. Sainte, . and Laigneau J. C., . Steric exclusion chromatography study of natural rubber films prepared from fresh field latex. pp. 143-153. ISSN 0127-7065
Abstract
Cyclohexane was used to replace tetrahydrofuran (THF) as the elution phase in analysis of natural rubber by steric exclusion chromatography. The films -which were prepared from fresh field latex and dissolved in cyclohexane had high gel rates up to 50 in some cases and overestimated average molecular -weights. These problems were linked to certain hydrophilic non-rubber constituents and more particularly to the crosslinking they seem to bring about under certain conditions. This study showed that these crosslinking which are not covalent could be overcome by adding hydroxylamine neutral sulphate to the latex prior to film preparation or by washing the films in deionised water before dissolving them. Using a mixed solvent such as a cyclohexane and THF mixture (95/5 v/v) to dissolve this type of samples also significantly limited the proportion of gel.
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Abstract
Cyclohexane was used to replace tetrahydrofuran (THF) as the elution phase in analysis of natural rubber by steric exclusion chromatography. The films -which were prepared from fresh field latex and dissolved in cyclohexane had high gel rates up to 50 in some cases and overestimated average molecular -weights. These problems were linked to certain hydrophilic non-rubber constituents and more particularly to the crosslinking they seem to bring about under certain conditions. This study showed that these crosslinking which are not covalent could be overcome by adding hydroxylamine neutral sulphate to the latex prior to film preparation or by washing the films in deionised water before dissolving them. Using a mixed solvent such as a cyclohexane and THF mixture (95/5 v/v) to dissolve this type of samples also significantly limited the proportion of gel.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Natural rubber |
| AGROVOC Term: | Latex |
| AGROVOC Term: | Chromatography |
| AGROVOC Term: | Molecular weight |
| AGROVOC Term: | Hydrophilicity |
| AGROVOC Term: | Cross-linking |
| AGROVOC Term: | Washing |
| AGROVOC Term: | Hevea brasiliensis |
| AGROVOC Term: | Mechanical properties |
| AGROVOC Term: | Elasticity |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 03:58 |
| URI: | http://webagris.upm.edu.my/id/eprint/23388 |
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