Copolymers between polylactic acid and polyethylene glycol, also alganic glycol were synthesized disocynate (MDI) prepared characterized. Swelling behaviors loss of weight these polyurethanes studied by immersion the gels in various buffer solutions. Particularly polyurethane foam showed highest EWC (equilibrium water constant) timedependent pH-dependent swelling.

To determine the optimal ratio of nano-hydroxyapatite (n-HA) to polylactic acid (PLLA) in the novel three-dimensional porous PLLA/n-HA composite scaffolds, low-temperature rapid prototyping technology was employed to fabricate the composite materials with different n-HA contents. Mechanical properties and degradation behaviors of the composites were examined, and the scaffold microstructure and...