Lactic acid O-carboxyanhydride

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Lactic acid O-carboxyanhydride
Lactic acid O-carboxyanhydride.png
Identifiers
CAS number 17578-13-1
ChemSpider 11239219
Jmol-3D images Image 1
Properties
Molecular formula C4H4O4
Molar mass 116.07 g mol−1
Melting point 28 °C (82 °F; 301 K)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

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]

ROP of lac-OCA.png

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]

  1. ^ a b Kricheldorf, Hans R.; Jonté, J. Michael (1983). "New polymer syntheses". Polymer Bulletin 9 (6–7): 276–283. doi:10.1007/BF00262719.