Topological, Micromolecular, and Supramolecular Structure of Ethylene-Propylenediene Elastomers and Patterns of their Combination with Nitrile Butadiene Rubbers

• Published in: Russian journal of physical chemistry. B Vol. 16; no. 4; pp. 756 - 763
• Main Authors: Livanova, N. M., Hasova, V. A., Pravada, E. S., Andriasyan, Yu. O., Popov, A. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-08-2022; Springer Nature B.V
• Subjects: Block copolymers; Butadiene; Chain branching; Chemical Physics of Polymer Materials; Chemistry; Chemistry and Materials Science; Copolymers; Elastomers; Ethylene; Physical Chemistry; Propylene; Synthetic rubber; interfacial interaction; structural defects; nitrile butadiene rubber; ethylene-propylene ternary copolymer; rubber mixtures; free volume fraction
• ISSN: 1990-7931; 1990-7923
• DOI: 10.1134/S1990793122040108

This paper considers the features of the interfacial interaction in vulcanizates based on mixtures of nitrile butadiene rubbers (NBRs) with a random and block arrangement of acrylonitrile (AN) units and ethylene propylene diene elastomers (EPDMs) (ethylene-propylene ternary synthetic rubber) with a linear and branched chain structure and different stereoregularity of the propylene units. The effect of the fluctuation network of ethylene units with strong microblockness is established in branched EPDM and paracrystalline isotactic propylene structures in a linear EPDM on the direction and intensity of interfacial interaction. It is shown that the participation of NBR block defect structures in the interfacial interaction of these copolymers is minimized against the background of the contribution of the free volume fraction
trans-
1,4
-
butadiene units in the interdefect regions of the matrix near the defective NBR structures.