SHEAR STRENGTH OF EPOXYPOLYSULFONE GLASS-REINFORCED PLASTICS 
IN A WIDE RANGE OF LOADING RATES
  
Yu. A. Gorbatkina,a V. I. Solodilov, a  
A. M. Kuperman, a D. V. Pavlovskii, a 
and M. V. Shustovb 

UDC 541.64.539.3

The shear strength of unidirectional epoxypolysulfone 
glass-reinforced plastics in the range of six decimal orders of loading 
rates has been measured. ED-22 epoxydiane resin (analog of DGEBA) 
modified by PSK-1 aromatic polysulfone served as a matrix. It has 
been shown that the strength values linearly increase with increasing 
logarithm of the loading rate; the sensitivity of composites to the 
rate of application of a force increases with increasing quantity 
of PSK-1 introduced into the matrix, and the fracture mechanism of 
composites is the thermofluctuation one. The laws revealed do not 
differ from those established by us earlier for glass-reinforced plastics 
based on epoxy binders modified by active diluents.

aN. N. Semenov Institute of Chemical Physics, Russian 
Academy of Sciences, 4 Kosygin Str., Moscow, 119991; email: 
viva@chph.ras.ru; b D. I. Mendeleev Russian Chemical-Technological 
University, 3 Miusskaya Sq., Moscow, 125190. Translated from 
Inzhenerno-Fizicheskii Zhurnal, Vol. 78, No. 5, pp. 48-54, 
September-October, 2005. Original article submitted 
October 27, 2004.