PLLA (Poly-L-Lactic Acid)
PLLA are biocompatible, non-toxic and harmless to human body after being degraded in the body through metabolism.
Therefore, PLLA are widely used in the medical field, such as controlled-release and slow-release drug carrier; tissue engineering scaffolds, cardiovascular scaffolds, bone fixation, and bone repair materials (such as absorbable screws, absorbable bone plates), microcapsules for injection, microspheres, implants and animal organ support elastomers, etc.
Product Index:
| Test Items | Detection Method | Testing requirements |
| Appearance | Visual Inspection | White or light brown solid |
| Intrinsic Viscosity | Ubbelohde Viscometer Method | 0.3-5.0dL/g |
| Molecular Weight Distribution | GPC | ≤2.0 |
| Specific Optical Rotation | Polarimeter Chloroform 0.01g/mL | -155°~-160° |
| Water Content | Karl Fischer moisture Analyzer | ≤0.5% |
| Ash Content | Gb/T9345.1-2008 | ≤0.5% |
| Monomer Residue | GC | ≤2% |
| Solvent Residue | HS-GC-MS | ≤1000ppm |
| Tin Residue | AAS | ≤150ppm |
| Heavy Metals（pb） | Heavy Metal Inspection Method | ≤10ppm |
| Glass Transition Temperature | Melting point | Dry weight loss | Residue on Ignition | Heavy metal Total content (Pb) | Catalyst residue | Monomer residue | Solvent residue |
| 60～65℃ | 170～180℃ | ≤0.5% | ≤0.5% | ≤10ppm | ≤150ppm | ≤2% | 0.1% |
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