Paper number 419

ADHESIVE INTERACTIONS IN INTERPHASES: COMPETITION BETWEEN ACID-BASE AND DIFFUSION MECHANISMS

Elena Pisanova, Serge Zhandarov, and Edith Mäder

Institute of Polymer Research
Hohe Str. 6, Dresden 01069, Germany

Summary

Bond strength between reinforcing fibers and polymer matrices can be controlled in two ways: 1) by intensification of molecular interaction at the interface and 2) by creation of a strong continuous layer (interphase) between the components. In this paper, we consider the possibilities of controlling interfacial strength by means of target-oriented variation of structure, thickness and strength of the interphase artificially created between the fiber and the matrix. Sublayers of different nature and thickness (0.05-30 µm) were deposited on carbon and glass fibers by means of various techniques: from a solution; by electrodeposition from a fluidized bed; by coating the fiber in vacuum with the polymer dispersion using an electron gun. The bond strength was measured using the pull-out and fragmentation tests.

Keywords

interphase, acid-base interactions, glass fibers, carbon fibers, fiber coating, micromechanical tests.