Citation
Farley P. S., . Geometrical isomerisation of polyisoprenes. Pt. 1. Occurrence and estimation of trans-alkene functionality in natural rubber. pp. 215-222. ISSN 0127-7065
Abstract
A procedure to measure low levels of trans-alkene content in samples of natural rubber has been developed based on H-NMR spectroscopy at 400 MHz. Modification levels ranging between 0.20 mole and 0.79 mole have been measured in natural rubber originating from a variety of grades of Malaysian rubber. There is no general correlation between trans-alkene content and grade of natural rubber. A combination of spin-counting and comparative NMR analyses has demonstrated that the sol and gel phases of natural rubber are homogeneous with both phases containing the same level of trans-alkene content.
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Abstract
A procedure to measure low levels of trans-alkene content in samples of natural rubber has been developed based on H-NMR spectroscopy at 400 MHz. Modification levels ranging between 0.20 mole and 0.79 mole have been measured in natural rubber originating from a variety of grades of Malaysian rubber. There is no general correlation between trans-alkene content and grade of natural rubber. A combination of spin-counting and comparative NMR analyses has demonstrated that the sol and gel phases of natural rubber are homogeneous with both phases containing the same level of trans-alkene content.
Additional Metadata
Item Type: | Article |
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AGROVOC Term: | Natural rubber |
AGROVOC Term: | Hevea rubber |
AGROVOC Term: | Polymers |
AGROVOC Term: | Isomerization |
AGROVOC Term: | NMR spectroscopy |
AGROVOC Term: | Evaporation |
AGROVOC Term: | Measurement |
AGROVOC Term: | Molecular weight |
AGROVOC Term: | Physical properties |
AGROVOC Term: | Hevea brasiliensis |
Geographical Term: | Malaysia |
Depositing User: | Ms. Suzila Mohamad Kasim |
Last Modified: | 28 Apr 2025 04:43 |
URI: | http://webagris.upm.edu.my/id/eprint/23486 |
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