Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 6, pp. 907−913.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © S.I. Volfson, N.A. Okhotina, A.I. Nigmatullina, R.K. Sabirov, 2012, published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 6,
OF SYSTEMS AND PROCESSES
Calculation of the Thermodynamic and Adhesive
Properties of Components of Dynamically Vulcanized
S. I. Volfson, N. A. Okhotina, A. I. Nigmatullina, and R. K. Sabirov
Kazan National Research Technological University, Kazan, Russia
Received January 23, 2012
Abstract—The solubility, polarity, compatibility of the components of dynamically vulcanized thermoplastic
elastomers: natural rubber, polypropylene, and layered ﬁ ller, which determine the composition and properties of
composites were computed. On the basis of calculations components for dynamic thermoplastic composites were
selected and composite materials with improved physical and mechanical properties were developed.
Nowadays, dynamically vulcanized thermoplastic
elastomers are one of the most advanced composite ma-
terials having a number of advantages, among which the
possibility of recycling without degradation of proper-
ties and reducing energy consumption providing signiﬁ -
cant reduction in the cost of the ﬁ nished product, are the
most important [1, 2]. Dynamically vulcanized thermo-
plastic elastomers (DVTPE) based on a blend of poly-
propylene (PP) with a nitrile butadiene rubber (NBRS)
are widely used due to availability of components and
their high resistance to hydrocarbons. However, in mix-
ing of polar elastomer and nonpolar thermoplastic phas-
es the bad compatibility of polymers occurs that results
in a composite material characterized by low strain-
DVTPE properties depend on a way of its production
and many factors: a size of the particles of a dispersed
phase, their shape and number in the volume, the
thermodynamic afﬁ nity of the components to each other.
The main problem in synthesis of a composite material
with good mechanical and physical characteristcs is
a way of introduction and uniform distribution of ﬁ ller
particles in the polymer matrix. It is especially difﬁ cult
to implement in a high molecular weight polymers due
to the high viscosity of their alloys.
Structure of the composite material on the basis of
incompatible polymers can be controlled by introduc-
ing special ﬁ llers into the composition and changing the
mixing technology. A layered silicate: montmorillonite
(MMT), was used as the ﬁ ller since it is known that the
layered silicates have the ability in certain conditions to
split on individual plates in the polymer matrix there-
with forming an organic-inorganic composite [3–10].
The introduction of small amounts of MMT particles
leads to signiﬁ cant improvement in operational, physi-
cal and mechanical properties, but also improves the
thermal stability of composites.
A goal of the study is to ﬁ nd optimum components
for DVTPE synthesis and study the effect of layered
silicate montmorillonite on the properties of DVTPE.
In this work we used nitrile butadiene rubber
NBRS-18AMN, NBRS-28AMN, NBRS-40AMN (TU
38.30313-98), polypropylene of a grade Balen 01030
(TU 2211-074-05766563-2005). A content of rubber in
DVTPE was 50–70% since the materials of this compo-
sition have the greatest consumer demand.