Electrically conductive epoxidised natural rubber-polyaniline dodecylbenzenesulfonate blends prepared by solution mixing

Cook S., . and Foot P. J. S., . and Tinker A. J., . and Yong K. C., . and Morgan H., . and Md Aris A., . Electrically conductive epoxidised natural rubber-polyaniline dodecylbenzenesulfonate blends prepared by solution mixing. pp. 59-77. ISSN 1511-1768

Epoxidised natural rubber (ENR) and polyaniline dodecylbenzenesulfonate (PAni.DBSA) were predicted to be miscible on the basis of simple solubility parameter calculations. Blends with electrical conductivities up to 10 3S.cm 1 were prepared for the first time by solution mixing. The lowest estimated electrical conductivity percolation threshold for these blends was 2.9 wt or 2.5 volume of added PAni.DBSA. NMR spectroscopy showed that the epoxide level of the host ENR decreased with increasing PAni.DBSA loading (due to the sensitive nature of ENR to acidic conditions). This decrease was a direct sign of ring opening in the ENR molecular structure. The ring opening of ENR was also identified indirectly through the increasing absorption value of FT-IR peaks in the region of 3390 cm 1 and through the trends observed by differential scanning calorimetry (DSC). Electrical conductivity measurement and morphology studies by optical microscopy and transmission electron microscopy (TEM) revealed that the ring opening did not affect the electrical properties of the blends.

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Abstract

Epoxidised natural rubber (ENR) and polyaniline dodecylbenzenesulfonate (PAni.DBSA) were predicted to be miscible on the basis of simple solubility parameter calculations. Blends with electrical conductivities up to 10 3S.cm 1 were prepared for the first time by solution mixing. The lowest estimated electrical conductivity percolation threshold for these blends was 2.9 wt or 2.5 volume of added PAni.DBSA. NMR spectroscopy showed that the epoxide level of the host ENR decreased with increasing PAni.DBSA loading (due to the sensitive nature of ENR to acidic conditions). This decrease was a direct sign of ring opening in the ENR molecular structure. The ring opening of ENR was also identified indirectly through the increasing absorption value of FT-IR peaks in the region of 3390 cm 1 and through the trends observed by differential scanning calorimetry (DSC). Electrical conductivity measurement and morphology studies by optical microscopy and transmission electron microscopy (TEM) revealed that the ring opening did not affect the electrical properties of the blends.

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Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Epoxides
AGROVOC Term:	Mixing
AGROVOC Term:	Blending
AGROVOC Term:	morphology
AGROVOC Term:	Electrical properties
AGROVOC Term:	Polymerization
AGROVOC Term:	Electrical conductivity
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 03:10
URI:	http://webagris.upm.edu.my/id/eprint/23063

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