Vi. Dubkova et al., EDGE WETTING ANGLES AND CONVERSION DEPTH OF EPOXY BINDER IN COMPOSITIONS WITH NICKEL-CONTAINING CARBON-FIBERS, Doklady Akademii nauk BSSR, 41(3), 1997, pp. 59-63
Dynamics of edge wetting angles of nickel-containing carbon fibers (Ni
-YB) by an epoxy binder and by some of its components depending on the
fiber carbonization temperature and the metal content was analysed. A
n ambiguous influence of nickel-containing carbon fibers on the physic
ochemical processes taking place on the filler-epoxy binder interface
was revealed. On the one hand, the introduction of metal into carbon f
ibers leads to the improvement of wetting nickel-containing carbon fib
ers by the epoxy binder. On the other hand, this results in reduction
in conversion depth of epoxy oligomer into the three-dimensional produ
ct. Its low-molecular component was revealed to make a major contribut
ion to the reduction in wetting angles of Ni-YB by the binder. At the
same time it is found that improvement of wetting nickel-containing ca
rbon fibers with epoxy oligomer matrix in contrast to the composites w
ith unmodified carbon fibers is not a determinal factor in increasing
the adhesion strength and improving physicomechanical characteristics.