Table 1: Low levels (−) and high levels (+) of variables in the fractional factorial design.

Levels
Factors+

(A) Polymer concentration (%)7.510
(B) Water phase fraction0.50.66
(C) Composition of PLLA in PHBV50/5075/25
(D) Amount of HA (%)510
(E) Molecular weight of PLLA (dL g−1)1.61.9