Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 12, pp. 1939−1949.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © S.A. Safronov, A.N. Gaidadin, A.V. Kuratova, V.A. Navrotskii, D.A. Kutsov, 2012, published in Zhurnal Prikladnoi Khimii, 2012,
Vol. 85, No. 12, pp. 2056−2067.
AND POLYMERIC MATERIALS
Dynamic Thermoplastic Elastomer
Based on Chlorosulfonated Polyethylene
S. A. Safronov, A. N. Gaidadin, A. V. Kuratova, V. A. Navrotskii, and D. A. Kutsov
Volgograd State Technical University, Volgograd, Russia
Received August 29, 2012
Abstract—A new kind of dynamic thermoplastic elastomers based on chlorosulfonated polyethylene and low-
density polyethylene, which combine the advantages of composites of polyoleﬁ n with nitrile rubber and of poly-
oleﬁ n with ethylene–propylene rubber and are free of their drawbacks, was developed. The composite undergoes
self-cross-linking in the course of processing. The speciﬁ c features of the structure of the composite, associated
with the formation of an intermediate interfacial layer, were revealed. The materials exhibit high strength and are
resistant to heat, frost, petroleum products, and ozone.
Thanks to high technological characteristics and
performance, polymer blends prepared by dynamic
vulcanization have found use, efﬁ ciently competing
with elastomers. The most widely used are the materials
based on polyoleﬁ ns and ethylene–propylene rubbers
[1, 2]. They are characterized by high resistance to air,
ozone, frost, acids, and alkalis. However, the resistance
of these dynamic thermoplastic elastomers (TPEs) to oil
and gasoline is poor. To obtain composites resistant to
oil and gasoline, polyoleﬁ ns are usually combined with
a polar, most frequently butadiene–nitrile (NBR), rubber.
Such composites are insufﬁ ciently resistant to oxidizing
media and frost. Therefore, it seemed promising to com-
bine simultaneously a polyoleﬁ n, a nitrile rubber, and an
ethylene–propylene-diene monomer . Unfortunately,
in such composites the necessary compromise between
the resistance to frost, petroleum products, and oxidizing
media was not attained. It can be expected that better re-
sults will be obtained with a polyoleﬁ n combined with its
modiﬁ cation product containing polar functional groups
in the macromolecule. An example of such TPE can be
a composite based on polyethylene and chlorosulfonated
polyethylene (CSM) [4, 5].
It is known [6, 7] that composites based on CSM
exhibit high levels of deformation and strength charac-
teristics, of dynamic properties, and of resistance to heat,
frost, petroleum products, ozone, and atmosphere. Hence,
it can be assumed that the use of CSM as elastomeric
component of TPE will allow preparation of materials
with a set of properties typical of composites based on
both ethylene–propylene and nitrile rubbers. It should be
taken into account that additive variation of parameters
with the composition is not characteristic of TPEs .
Therefore, attainment of a high level of parameters ow-
ing to joint use of polyethylene and CSM is unexpected.
The goal of this study was to develop TPE based on CSM
and low-density polyethylene (LDPE) and to examine the
conditions for preparing the composites and their struc-
tural features, technological properties, and performance.
As polymeric components of TPE we used LDPE of
grade 10803-020 [GOST (State Standard) 16837–77]
and CSM-20I [TU (Technical Speciﬁ cation) 6-55-9–90],
analogue Hapalon 20.
Blended thermoplastic elastomers (TPEs) were pre-
pared in a high-speed Brabender rubber mixer for 10 min
at 140°C and rotor rotation rate of 65 rpm. The amount