1. structure, properties, synthesis and application
Polylactic acid:
structure, properties, synthesis and application
Tatyana N. Volgina
Department of Technology of basic organic synthesis and high-molecular compounds

2. Purposes of presentation
Modern data of PLA synthesis
Unusual properties of PLA
Perspectives of application of PLA

3. What is the main ecological problem ?
It is destructed during thousand years
Oil and gas
Dirty Planet
Industrial wastes

4. What is PLA? Biodegradable Biocompatible Thermoplastic
Aliphatic polyether

5. How to obtain PLA? - H2O enzyme hydrolysis dextrose fermentation
starch
enzyme hydrolysis
- H2O
lactic acid
microbiological process
fermentation
dextrose

6. Lactid polymerization
ring formation
-H2O
PLA Low Molecular Weight
PLA High Molecular Weight

7. PLA as packaging materials
PLA holds
temperatures
from -40 °C
to 250 °C

8. Gattinoni Wedding Dress made from PLA fibers
PLA as fibers
Gattinoni Wedding Dress made from PLA fibers

9. PLA as the solid substrate

10. PLA as implant materials

11. PLA as an engineering plastics

12. Biodegradation of PLA: In the composting plant, a cup is completely decomposed by microorganisms within about 5 weeks (Source: NatureWorks LLC)

13. Biodegradation is a complex process
The main factors of biodegradation: air, water, day light, temperature, microorganisms
Aerobic conditions
Waste
Microorganisms
CH4 + H2S + NH3
Anaerobic conditions
CO4 + H2O + NO2
The main products of biodegradation: carbon dioxide, methane, water

14. PLA is a new alternative for consumption
Conclusion
PLA is a new alternative for consumption