Stereochemistry of Poly lactic Acid

Isotactic poly(L-lactide) or poly(D-lactide) LLLLLL or -DDDDDD- 170-190 55-65 

Random optical copolymers Random level of meso- or D-lactide in L-lactide or D-lactic acid in L-lactic acid 130-170 45-65 

Form Space Group Chain Orientation No. of Helices/ Unit Cell Helical Conformation a (nm) b (nm) c (nm) Q( (degree) /3 (degree) 7 (degree) 

---