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PLLA crystallization rates increase with nHA content owing to increased nucleation, which compensates a decrease in spherulite growth rate, G, at 100 to 130 °C, and to suppression of the twin peak in G(T) seen in pure PLLA, linked to a transition from the α phase to the disordered α’ phase as T decreases. The decrease in G(T) reflects an increase in viscosity, but nHA may also favour the α’ phase, with consequences not only for the crystallization kinetics but also for resorbtion rates.
Athanasios Nenes, Mária Lbadaoui-Darvas
Anne-Claire Marie Billault--Roux