PDLLA
PDLLA

BioDegmer® Poly-DL-lactide 

Polylactide (Poly(lactic acid), PLA) is polymer obtained by the ring-opening polymerization of lactide (cyclic dimer of lactic acid) as monomer. Since lactide has 3 optical isomer as L-lactide, D-lactide, and DL-lactide, the polymers obtained from L-lactide, D-lactide, and DL-lactide are abbreviated to PLLA, PDLA, and PDLLA, respectively. The chemical properties of L-lactide and D-lactide are the same while their steric structures are different, PLLA polymer and PDLA polymer have the same characteristics. On the other hand, PDLLA polymer has sterically different structure with PLLA and PDLA polymers, so that the polymer shows the different characteristics with those polymers. 組成図

Chemical name
Poly(DL-lactic acid)
Poly-DL-lactide
Poly[oxy(1-methyl-2-oxoethylene)]
Poly[3,6-dimehthyl-1,4-dioxane-2,5-dione]
Chemical formula
?(C3H4O2)n?
?O?CO?CH(CH3)?
Formula weight
72.06266
CAS number
26680?10?4, 26100?51?6, 26023?30?3
PoLyInfo PID
P090176, P902489
Characteristics
Amorphous polymer, Transparent polymer

Typical specification of PDLLA

The following shows the specification example of our PDLLA polymer product.
Testing item
Specification
Inherent viscosity 
ηinh = 0.85 ? 1.15 (dL/g) [0.5 g/dL CHCl3, 25 ℃]
Weight averaged
molecular weight(MW)
MW = 100,000 ? 180,000
Glass transition
point(Tg
Tg = 50 ? 60 (℃)
Particle size
Not passing 500 μm mesh screen.
Appearance
No contamination by foreign objects
Normal coloring (white or beige/ivory) (Sensory test with eye)
If you have the specific requirement for PDLLA polymer, please feel free to ask us.

Potential application of PDLLA

PDLLA polymer is amorphous because the polymer composed randomly by the repeating units from L-lactic acid and D-lactic acid. Therefore, the polymer did not show melting point and has inferior mechanical properties than PLLA, so that the polymer is mainly applied for the coating of suture. Recently, the applications for the novel absorbable medical device has been researched and developed.
Applicable examples of the medical device obtained from PDLLA polymers are shown with color in follows: