ISSN 1070-4272, Russian Journal of Applied Chemistry, 2016, Vol. 89, No. 10, pp. 1655−1661. © Pleiades Publishing, Ltd., 2016.
Original Russian Text © A.B. Glazyrin, M.I. Abdullin,
2016, published in Zhurnal Prikladnoi Khimii, 2016, Vol. 89, No. 10, pp. 1337−1344.
AND POLYMERIC MATERIALS
Chemical modiﬁ cation is one of the methods allow-
ing preparation of polymer products with new properties
on the basis of already known commercially produced
polymers. In chemical modiﬁ cation, it is important to
elucidate the relationship between the nature of the func-
tional group introduced into the initial polymer macro-
chain, the degree of functionalization, and the properties
of the modiﬁ ed polymer. This allows prediction of the
properties of polymer products and hence of the ﬁ elds
of their possible application.
Previously we demonstrated the possibility of pre-
paring new polymer products based on syndiotactic
1,2-polybutadiene (1,2-PB) by introducing functional
groups of different chemical nature into macromolecules
via С=С bonds of the polymer [1–14]. Modiﬁ ed 1,2-PB
is of interest from the viewpoint of its practical use in di-
verse ﬁ elds: as component of adhesive compounds and
sealants for various purposes [5, 15] and of energetic
polymer materials , as technological additive to ther-
moplastic compounds [6, 10], and as a mechanophore,
i.e., a polymer product capable to respond on the action
of external mechanical forces by changing the composi-
tion or structure of macromolecules .
Modiﬁ cation of syndiotactic 1,2-PB, which is a ther-
moplastic, is accompanied by changes in its physico-
chemical characteristics. In particular, it inﬂ uences the
glass transition and yield point of the polymer and the
viscosity of the polymer melt, i.e., the parameters that
determine the temperature interval of processing and the
application ﬁ elds of polymer materials and items.
This study was aimed at revealing how the degree
of modiﬁ cation and nature of functional groups in mac-
romolecules of modiﬁ ed syndiotactic 1,2-PB inﬂ uence
such practically important properties of polymer prod-
ucts as glass transition and ﬂ uidity parameters and the
rheological characteristics of the polymer melt.
These data are important for directional synthesis of
modiﬁ ed 1,2-polydienes with required properties and
for evaluation of the possible application ﬁ elds of the
new polymer products.
We used for modiﬁ cation commercial syndiotactic
1,2-PB of JSRRB-830 grade (produced by Jараn
Synthetic Rubber Co.) with the following characteristics:
number-average MM 65 × 10
, degree of polydispersity
1.78, content of 1,2-units 84% (with 1,4-polymerization
units as the remainder), degree of syndiotacticity 86%,
and crystallinity 26%.
Properties of Modiﬁ ed Polymers
Based on Syndiotactic 1,2-Polybutadiene
A. B. Glazyrin* and M. I. Abdullin
Bashkir State University, Ufa, Bashkortostan, 450074 Russia
Received October 21, 2016
Abstract—The inﬂ uence of the chemical modiﬁ cation on the properties of syndiotactic 1,2-polybutadiene deriva-
tives that contain various functional groups in macromolecules and show promise for practical use was studied.
The dependence of the glass transition point and the ﬂ uidity and rheological properties of modiﬁ ed polydiene
melts on the nature of the functional group in the macrochain and on the degree of the polymer functionalization
was revealed. The possibility of directional synthesis of modiﬁ ed polymer products with the required operation
characteristics on the basis of syndiotactic 1,2-polybutadiene was demonstrated.