The stronger reinforcing effect of the APStreated fibers can be rationalized in terms of the higher reactivity of the NH2 functions toward the epoxy moieties of the matrix compared with that of the mercapto (SH) groups.
The stronger reinforcing effect of the APStreatedfibers can be rationalized in terms of the higherreactivity of the NH2 functions toward the epoxy moietiesof the matrix compared with that of the mercapto(SH) groups.