| POLYMER CLASS | Polyesters |
| COMMON NAMES | Polylactic acid, Poly(L-lactide), Poly(D,L-lactide) |
| STRUCTURE BASED NAME | Poly(2-hydroxypropionic acid) |
| ACRONYMS | PLA |
| CAS # | 33135-50-1 |
| CurlySMILES | C{-}(C)C(=O)O{n+} |
| CAS # | 26100-51-6 |
| COMMON NAMES | Lactic acid |
| SMILES | OC(=O)C(O)C |
| Std. InChI | 1S/C3H6O3/c1-2(4)3(5)6/h2,4H,1H3,(H,5,6) |
| Std. InChIKey | JVTAAEKCZFNVCJ-UHFFFAOYSA-N |
| STRUCTURE |
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| PROPERTY | UNIT | VALUE / RANGE | PREFERRED |
| Molar Volume Vm | mL mol-1 | 56.7 - 57.7 | 57.2 |
| Density ρ | g mL-1 | 1.25 - 1.27 | 1.26 |
| Solubility Parameter δ | MPa1/2 | 19.2 - 21.1 | 20.2 |
| Molar Cohesive Energy Ecoh | J mol-1 | 21100 - 25200 | 23300 |
| Glass Transition Temperature Tg | K | 326 - 337 | 332 |
| Molar Heat Capacity Cp | J (mol K)-1 | ~ 99 | |
| Entanglement Molecular Weight Me | g mol-1 | 5700 - 14400 | 8700 |
| Index of Refraction n | none | 1.44 - 1.50 | 1.47 |
| PROPERTY | UNIT | VALUE / RANGE | PREFERRED |
| Molecular Weight of Repeat unit | g mol-1 | 72.06 | |
| Van-der-Waals Volume VvW | mL mol-1 | 35.64 | |
| Molar Volume Vm | mL mol-1 | 51.7 - 54.9 | 54.9 |
| Density ρ | g mL-1 | 1.31 - 1.39 | 1.31 |
| Solubility Parameter δ | MPa1/2 | 20.0 - 20.9 | 20.3 |
| Molar Cohesive Energy Ecoh | J mol-1 | 20800 - 24000 | 22600 |
| Glass Transition Temperature Tg | K | 285 - 342 | 312 |
| Molar Heat Capacity Cp | J (mol K)-1 | 86 - 100 | 93 |
| Entanglement Molecular Weight Me | g mol-1 | 3900 - 4900 | 4300 |
| Index of Refraction n | none | 1.47 - 1.49 | 1.48 |
Last updated: December 31, 2015