Abstract
Abstract Of the large number of different industrial synthetic rubbers the foremost is butadiene rubber, first produced by the polymerization of butadiene by Lebedev. Nowadays, in order to improve the mechanical properties of the rubber the polymerization is carried out in conjunction with some copolymerizing additive: styrene, acrylonitrile, etc. Styrene rubbers (SKS) and nitrile rubber (SKN) have a number of quite high chemical and mechanical properties and are produced on a full industrial scale. Hydroxyl rubbers, i.e., those where the selected substance for copolymerizing with the butadiene is a hydroxyl-containing monomer, are able to offer a great deal to industry, since the presence of the hydroxyl groups considerably improves their mechanical properties. However, they do not figure among the available industrial grades of synthetic rubber; yet from the data from American scientists they have considerable value. Good results have been given by work effected by Nagibina and others in the Inst. Khim. Nauk SSSR on producing a rubber on the basis of the joint polymerization of butadiene with dimethyl vinyl acetylenyl carbinol under various conditions.
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