Conclusions on Rubber Resistance to Liquids

If it is true that, more often, it is desirable to have rubber with a great resistance to liquids, sometimes it is preferable to have rubber able to control the transport of the diffusing substance. This is the case with a transdennal system (patch) for drug delivery. 

In a few words only, as this subject is outside the scope of this book, there are various advantages for these kinds of drug delivery systems  

On the other hand, when different rubber compounds are cured together, as seen with the components of a tire made of rubber In various compositions, a diffusion of the active agent, at least at the interface, is of great interest, as it makes the binding of these components more efQdent. As shown in Section 7.3, it is possible to increase and control this diffusion phenomenon. 

Brown R.P. 1979. Physical Testing of Rubbers, Applied Science Publishers, London. 

Flory P.J. and J. Rehner. 1943. Statistical mechanics of synthetic tire rubber. J. Chem. Phys. 11 521-26. 

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