2 The Matrix in FRCs
The polymeric plastic matrix, consisting of polymerised
monomers, has the function of holding the fibers together in
the composite structure. It also transfers stresses between fibers
and protects the fibers from the outside environment such as
chemicals, moisture and mechanical shocks. Thus the matrix
may influence the compressive strength, interlaminar shear and
in-plate shear properties, interaction between the matrix and
the fiber and defects in the composite [5]. Two types of resins,
the cross-linked or linear, are used in FRCs. The cross-linking
polymer is also called a thermoset polymer, referring to
multifunctional or dimethacrylate resins. The linear polymer
is also called a thermoplastic polymer, referring to monofunctional
methacrylate polymers [1].