Citation
Sambhi M. S., . Degradative studies related to the Plasticity Retention Index of the Standard Malaysian Rubber Scheme. II. Kinetics of degradation. pp. 107-114. ISSN 0127-7065
Abstract
Linear relationships obtained between intrinsic viscosities and Wallace plasticity data make it possible to express plasticity data in terms of number-average degrees of polymerisation and to use plasticity data in a quantitative fashion. The successful use of kinetic expressions that do not incorporate diffusion parameters lends support to the findings that for early stages of thermal-oxidative degradation diffusion effects are not of significance particularly for air-saturated natural rubber samples. If initially chain scission of natural rubber follows zero-order or pseudo-zero-order kinetics and becomes autocatalytic in due course then it is likely that the degradation plasticity data can be represented by typical first-order type of kinetic equations. However deviations are bound to occur as chain scission of natural rubber can follow varying kinetic paths.
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Abstract
Linear relationships obtained between intrinsic viscosities and Wallace plasticity data make it possible to express plasticity data in terms of number-average degrees of polymerisation and to use plasticity data in a quantitative fashion. The successful use of kinetic expressions that do not incorporate diffusion parameters lends support to the findings that for early stages of thermal-oxidative degradation diffusion effects are not of significance particularly for air-saturated natural rubber samples. If initially chain scission of natural rubber follows zero-order or pseudo-zero-order kinetics and becomes autocatalytic in due course then it is likely that the degradation plasticity data can be represented by typical first-order type of kinetic equations. However deviations are bound to occur as chain scission of natural rubber can follow varying kinetic paths.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Natural rubber |
| AGROVOC Term: | Vulcanization |
| AGROVOC Term: | Thermal treatment |
| AGROVOC Term: | Thermal degradation |
| AGROVOC Term: | Polymerization |
| AGROVOC Term: | Ageing |
| AGROVOC Term: | Data |
| AGROVOC Term: | Linear models |
| AGROVOC Term: | Viscosity |
| AGROVOC Term: | Plasticity |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 05:14 |
| URI: | http://webagris.upm.edu.my/id/eprint/23550 |
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