Effect of the Modification
of Aluminosilicate Ash Microsphere Surfaces
on Physical-Mechanical Properties of Polyurethane Foam
L. P. Varlamova
, V. K. Cherkasov
, N. M. Semenov
, V. A. Egorov
S. A. Ryabov
, and V. A. Izvozchikova
Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Nizhni Novgorod, Russia
Lobachevskii Nizhni Novgorod State University, Nizhni Novgorod, Russia
Research Institute of Chemistry, Lobachevskii Nizhni Novgorod State University, Nizhni Novgorod, Russia
Received November 27, 2008
Abstract—The rigid polyurethane foam materials based on ODF-M complex oligoester filled by hollow silica-
alumina microspheres with various surface nature were studied. Physical-mechanical properties of the obtained
materials were studied.
ISSN 1070-4272, Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 6, pp. 1098–1101. © Pleiades Publishing, Ltd., 2009.
Original Russian Text © L.P. Varlamova, V.K. Cherkasov, N.M. Semenov, V.A. Egorov, S.A. Ryabov, V.A. Izvozchikova, 2009, published in Zhurnal
Prikladnoi Khimii, 2009, Vol. 82, No. 6, pp. 1040–1042.
At present aluminosilicate ash microspheres (AM)
taken from the ash-ablation formed upon coal
combustion at heat power plants gain ever-growing use
as filling agents of various polymers.
The effect of aluminosilicate ash microspheres on
physical-mechanical properties of filled polyurethane
foam (PUF) obtained on the basis of a polyether was
studied earlier . It was shown that the inclusion of
AM results in increasing viscosity of the filled
composition and in changing its strength properties.
Therewith the thermal conductivity coefficient of the
filled material remains unchanged.
To prepare polyurethane foams, polyols based on
both polyethers and complex oligoesters are used.
Thus it is known that the nature of a polyester exerts a
crucial effect on the strength properties of PUF
compositions . The main physical-mechanical
characteristics: strength, thermal conduction, and water
adsorption of PUF compositions based on complex
oligoesters are lower than those of the compositions
based on polyethers. In this connection development
engineers of products are facing an important problem
to create materials based on complex oligoesters and
possessing a high level of operational properties due to
the inclusion of active filling agents.
The aim of this work was to study an opportunity of
using AM as a filling agent for rigid PUF material
based on complex oligoesters ODF-M (technical
specifications 2226-003-58646534-2006). Hollow
unfractionated AM (technical specifications 14.2-
25595170-001-2003) with particle size from 60 up to
300 μm and bulk weight of 0.40–0.68 g cm
in the work.
It is known that microspheres are modified by
various finishing agents to provide a strong adhesion
between a filling agent and a polymeric matrix .
Copolymers of derivatives of (meth)acrylic acid
(sodium salt, amide, and methyl ether) of various
molecular weight, and also silane derivatives such as
γ-aminopropylethoxysilane (AGM-9) were used in the
present work as modificators of AM surfaces . The
kinematic viscosity of 1% solutions of copolymers was
determined according to GOST 18249. The kinematic
viscosity of the low-molecular (LM) copolymer is
20 cP and that of the high-molecular (HM) copolymer,
200 cP. Ash microspheres were treated on a rotor
evaporator at the degree of depositing a finishing agent
of about 1% of the AM weight.