Lactic acid O-carboxyanhydride
Appearance
Names | |
---|---|
IUPAC name
5-Methyl-1,3-dioxolane-2,4-dione
| |
Identifiers | |
3D model (JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.116.276 |
EC Number |
|
PubChem CID
|
|
CompTox Dashboard (EPA)
|
|
| |
| |
Properties | |
C4H4O4 | |
Molar mass | 116.072 g·mol−1 |
Melting point | 28 °C (82 °F; 301 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Lactic acid O-carboxyanhydride (lac-OCA) is an organic compound. It is used as a monomer equivalent to lactic acid or lactide in the preparation of poly(lactic acid). When this monomer undergoes ring-opening polymerization, one equivalent of carbon dioxide gas is released for every lactic acid unit incorporated into the polymer:[1]
This compound is prepared by treatment of lactic acid or its salts with phosgene or one of its equivalents, e.g. diphosgene.[1]
References
[edit]- ^ a b Kricheldorf, Hans R.; Jonté, J. Michael (1983). "New polymer syntheses". Polymer Bulletin. 9 (6–7): 276–283. doi:10.1007/BF00262719.