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Royal Society of Chemistry, CrystEngComm, 8(17), p. 1778-1782

DOI: 10.1039/c5ce00119f

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Polymorphism of a polymer precursor: metastable glycolide polymorph recovered via large scale high-pressure experiments

Journal article published in 2015 by Ian B. Hutchison, Amit Delori, Xiao Wang, Konstantin V. Kamenev, Andrew J. Urquhart ORCID, Iain D. H. Oswald ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

A novel polymorph of glycolide, the pre-cursor to polyglycolic acid, has been observed at 0.6 GPa. Large scale high-pressure production has been performed and the seeds successfully used to aid crystallisation of the polymorph at ambient pressure. PIXEL calculations confirm the metastable nature of the polymorph. Subsequent experiments show that, whilst initially stable for 12 days, this may be a case of disappearing polymorphism.