A silane coupling agent containing isocyanate was designed and employed to modify the interface of
quartz fiber reinforced silicon containing arylacetylene( PSA) composite. The flexural properties, dielectric properties,
heat-resistant properties and mechanical properties of GF/ PSA composite were compared. The results showed
that, the interfacial adhesion performances between the fibers and the resin are improved by the chemical bonding between
the coupling agent and the active groups on fibers surfaces. The interlaminar shear strength of the treated quartz
fiber-PSA composite has been greatly improved by 24. 7% compared with those untreated. The results revealed that
the flexural strength of composite increased 12. 4% after modified. The treating process on quartz fiber by IPTS had
ignored effect on the dielectric properties of composite, and the insulating properties of composite are still excellent.
No glass transition happened under the tested conditions, which meant the addition of IPTS wouldn’ t influence the
heat-resistant of composite.