Vol. 81 No. 1 (2022)
INGREDIENTS

Modified Magnetite as a Component of a Curing System for Sulfur-Modified Chloroprene Rubber

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  • A.A. Khachaturov,
  • A.O. Milova,
  • E.E. Potapov,
  • A.N. Kovaleva

Published 2022-07-24

How to Cite

[1]
Khachaturov А., Milova А., Potapov Е. and Kovaleva А. 2022. Modified Magnetite as a Component of a Curing System for Sulfur-Modified Chloroprene Rubber. Kauchuk i Rezina. 81, 1 (Jul. 2022), 38–43.

Abstract

The influence of natural (iron-ore concentrate of magnetite containing about 70% iron) and synthetic magnetite in the presence of traditional
curing agents (ZnO and MgO) on the curing processes and properties of sulfur-modified chloroprene rubber vulcanizates was studied.
Modification of the surface of magnetite with polyfunctional compounds: glycine (NH2-CH2-COOH), cysteine (HOOC-CH(NH2)-CH2-SH) and
urotropin (C6H12N4) improves the complex of stress-strain properties of chloroprene rubber vulcanizates, in this case amino acids glycine and
cysteine are more efficient. Synthetic magnetite was obtained by chemical co-precipitation of iron salts Fe3+ and Fe2+ in a ratio of 2:1, and
has a larger specific surface area than natural (natural from 0,23 to 0,64 m2/g, and synthetic 210 m2/g according to BET method). Systems
with synthetic magnetite demonstrated higher stress-strain properties than systems with natural magnetite. Modified magnetite can be
recommended for obtaining composite materials with a set of unique properties, combined with a high level of stress-strain properties.

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