Abstract
AbstractThe properties of butadiene—pentadiene copolymers in which all butadiene and pentadiene units are trans‐1,4, are briefly reported. These copolymers, independently of their composition, are crystalline and their melting temperatures are intermediate between those of trans‐1,4 homopolymers of butadiene and pentadiene. These properties are attributable to the isomorphism between the trans‐1,4 pentadiene units and the units of the high temperature stable modification of trans‐1,4 polybutadiene.In order to emphasize the influence of the isomorphism phenomena of monomeric units on the properties of the macromolecules, the properties of butadiene‐pentadiene copolymers, in which the butadiene units are trans‐1,4 and the pentadiene units are partly 1,2, are also reported.
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