
114 HIGH PERFORMANCE POLYMERS
4.4.2 Fibers
Many attempts have been made to increase the
rigidity of PPE molding compositions by admixing
reinforcing fibers composed of inorganic or organic
material in the resin. Already by 1974, glass fibers
had been suggested as reinforcing material [65,66].
In order to improve the fiber-matrix adhesion in
the composition, unsized fibers with siloxanes that
contain the Si−−H bond have been reported [67].
The treatment of the fibers with vinylsilanes or γ -
glycidoxypropyltrimethoxysilanes is advantageous to
improve the adhesion [68].
Another commonly used surface modification
method of the reinforcing fibers consists in the
treatment ...