The surface energy of PHBV, maple wood fiber and talc are
listed in Table 3. These values have been taken from the various
reference sources [12,14–21].
Interfacial strength of the reinforcement and matrix can be well
correlated with the interfacial energy/interfacial tension [22]. A
generalized expression for an estimation of the interfacial tension
between the two condensed interfaces is given by Giese and Van
Oss [13,23,24].