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Rubber curing and properties
von I. D. Rosca, J. M. Vergnaud
In spite of the fact that it is hard work to try to tell the content of a book in a short paper, nevertheless it is worth doing it in selecting the points which seem perhaps at this instant the most important to the authors. The various parts playing a role not only in the cure of rubber but also for the properties of vulcanised materials are deeply considered in the book.
After a bird’s eye view on the first attempts made in the cure of rubber, the process of heat transfer not only by conduction but also by convection is examined; and following, the process of cure of rubber in mould is studied by considering also the way of heating in the mould and the operational conditions which may appear. Of course, the kinetics of the cure reaction is examined with the various methods ranging from the calorimetry to the methods based on the torque properties of the material during the cure; then, the interest in the injection moulding system is evidently shown.
The outstanding qualities of the final materials appear, coupled with the way through which they have been cured: the mechanical properties either under static or under dynamic conditions; the resistance to liquids. Not only has been established the theory of diffusion through the rubbers of liquids but also, more important, that of the curing agent taking place especially between two rubber materials of different nature, which opens a window for the process of re-treading tyres.
And, finally, to answer the questions set on the future of the economy and of the ecology, a few methods of recycling waste rubber tyres are reviewed by deeply considering those leading to second-hand products of value.