Distribution of ester plasticisers between two rubber phases: estimation of partition coefficients and comparison with theory


Citation

Aris Ahmad, . and Tinker A. J., . and Aubrey D. W., . Distribution of ester plasticisers between two rubber phases: estimation of partition coefficients and comparison with theory. pp. 1-13. ISSN 0127-7065

Abstract

Partition coefficients have been determined for a range of ester plasticisers distributed between natural rubber and epoxidised natural rubber by placing rubber sheets in contact. Partition coefficient is found to depend on solubility parameters of plasticiser and rubbers crosslink density in each rubber and overall level of plasticiser. A comparison between experiment and theory was made by using the Flory-Rehner hypothesis and the assumption of equal activity In a of plasticiser in the two rubbers at equilibrium. The correspondence between the resulting estimates of polymer-solvent interaction parameter and expectations from observed values is good suggesting that the observed Kd values are in accord with theory.


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Abstract

Partition coefficients have been determined for a range of ester plasticisers distributed between natural rubber and epoxidised natural rubber by placing rubber sheets in contact. Partition coefficient is found to depend on solubility parameters of plasticiser and rubbers crosslink density in each rubber and overall level of plasticiser. A comparison between experiment and theory was made by using the Flory-Rehner hypothesis and the assumption of equal activity In a of plasticiser in the two rubbers at equilibrium. The correspondence between the resulting estimates of polymer-solvent interaction parameter and expectations from observed values is good suggesting that the observed Kd values are in accord with theory.

Additional Metadata

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Item Type: Article
AGROVOC Term: Esters
AGROVOC Term: Natural rubber
AGROVOC Term: Solubility
AGROVOC Term: Density
AGROVOC Term: Polymers
AGROVOC Term: Epoxides
AGROVOC Term: Friction coefficient
AGROVOC Term: Experiments
AGROVOC Term: Equilibrium theory
Depositing User: Ms. Suzila Mohamad Kasim
Last Modified: 24 Apr 2025 06:28
URI: http://webagris.upm.edu.my/id/eprint/23377

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