ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 8, pp. 1282−1287. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © V.V. Chapurkin, V.P. Medvedev, S.V. Chapurkin,
2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 8, pp. 1161−1167.
AND POLYMERIC MATERIALS
Vulcanization of Fluoroelastomers Using Fluorine Peroxides
V. V. Chapurkin
, V. P. Medvedev
, and S. V. Chapurkin
Volgograd State Technical University, pr. Lenina 28, Volgograd, 400131 Russia
LLC Zirax-Nefteservice, ul. Rokossovskogo 133, Volgograd, 400010 Russia
Received August 25, 2015
Abstract—Fluorinated peroxide compounds are used as effective curing and modifying for commercial ﬂ uoro-
elastomers. It is shown that the use of ﬂ uorinated peroxide derivatives of poly- and perﬂ uorocaronyl compounds
allows development of ﬂ uoroelastomer materials with high thermal and chemical resistance.
Fluoroelastomers and rubbers based on them are ap-
plied in the production of advanced technical products
operated in particularly harsh conditions: under high
temperature, in contact with hydrocarbons and corrosive
environments, and also under high mechanical stresses.
To protect chemical equipment when operating in these
conditions the application of ﬁ lm coatings of ﬂ uoropoly-
mer solutions [ﬂ uoroelastomers or ﬂ uoroplastics soluble
(Ftorlak)] was the most successful . It is known that the
presence of ﬂ uorinated groups into the polymer structure
allows improving these materials through imparting a
combination of properties such as: frost and heat resis-
tance, resistance to aggressive environments and solvents,
oleo- and hydrophobicity [2–5].
Vulcanizing agents strongly affect the mechanical
properties, heat and chemical resistance of ﬂ uoroelas-
tomer materials. Peroxide initiators, especially contain-
ing a cumylperoxy group, are the most widely used
for vulcanizing ﬂ uoroelastomers [6–9], but the use of
cumylperoxides is limited by relatively high toxicity of
acetophenone resulted in their decay . Benzoyl perox-
ides are also widely used (BP) , moreover, it is known
that ﬂ uorine-containing benzoyl peroxide are effective
vulcanizing agents of ﬂ uoroelastomers. However, in the
course of the use of diacyl peroxides there occur defective
end groups (carboxyl groups) that leads to lowering heat
and frost resistance and chemical resistance of rubbers .
In order to solve the many problems associated with
the vulcanizing ﬂ uoroelastomers new approaches are
needed in this direction. We have previously shown the
effectiveness of using laser light to crosslink the ﬂ uoro-
elastomer SKF-32 [10, 11]. Use of the laser allows pro-
ducing new anti-friction and protective coatings [12, 13].
However, for the implementation of new approaches to
the creation of products based on ﬂ uoroelastomers with a
new set of properties ﬂ uorine-containing peroxide com-
pounds are required which do not have these drawbacks
but are effective vulcanizing agents of ﬂ uoroelastomers.
The study is devoted to vulcanizing ability of differ-
ent ﬂ uorine-containing peroxide compounds synthesized
based on poly- and perﬂ uorocarbonyl compounds [14,
15], the range of latter is constantly expanding in recent
years [16–18]. The use of ﬂ uorinated peroxides for curing
ﬂ uoroelastomers is a way to increase the ﬂ uorine content
in the macromolecules of the polymer during vulcaniza-
tion, improve their thermal and aggressive resistance.
Fluorinated peroxides serve as modifying agents that
are built into the structure of the vulcanizates obtained
in vulcanaizing ﬂ uororubbers that allows improve new
materials through imparting new additional desired prop-
erties [6, 13, 19].
IR spectra were recorded on a spectrophotometer
Specord IR-75 in a thin ﬁ lm for pure oily substances and
in liquid parafﬁ n for crystalline ones,
H NMR spectra
were recorded on spectrometers Varian Mercury-300 BB