Translate the text using a dictionary. Write out the words which are the terms for a) the properties and types of polymers; b) their uses

An important section of polymer synthesis is concerned with production of heat resistant polymers capable of withstanding prolonged use at high temperatures. It was suggested that many polymers should be synthesized for this purpose. Very great advancements have been made in work on polymers designed for various electrical purposes, such as for production of insulators, electrically conducting materials, semiconductors, etc.

It should be noted that some inves­tigators have paid much attention to the problem of synthesis of polymeric semiconductors and superconductors. For this purpose polymers with conjugated bonds of the type of polyvinylene, polyacetylene, etc. and their derivatives have been prepared.

The problem of protection of the environment isclosely connected with the problem of production of polymers. This is particularly important in the case of packaging materials. This problem is to be solved in a number of ways, synthesis of special polymers being one of them.

On the other hand, practical necessity would give rise to the task of preparing non-flammable and self-extinguishing polymers, it being extremely important to the building industry and a number of branches of the new technology.

Another great problem is to find ways of preparing a wide assortment of polymers. It should be mentioned that each element makes its own contribution to the combination of properties. A clear example of this is provided by the organo-silicon polymers.